In Blog, Inverters, Micro Inverters & Optimisers

Huawei inverter testing

Huawei inverters are the new kid on the solar block. I first published this Huawei inverter review in May 2018. It gained a bit of attention and some online criticism saying it was not accurate. However, Huawei approached me about this review, and apart from some cheeky comments I made, they graciously agreed with the content and said they were working on improvements.

Since then I’ve just visited Huawei’s factory in Suzhou, and their R&D centre in Shanghai. Trent, Nicole and I met with the Stephen Zhou, the general manager for residential inverters and we discussed the points in this blog and the road map for Huawei’s inverters. I’ve updated some sections as Huawei have already made some improvements to their inverter since I first published the blog.  I’ve also posted a Huawei optimiser YouTube Video in December 2020.




Who is Huawei anyway?

Huawei’s Headquarters are in Cantonese-speaking China, and in Cantonese, it is pronounced “Wah way”. However, when translating to English, the company chose to write it in pinyin with the Mandarin pronunciation “Hwa way”, so I think we should run with that.

Huawei is pronounced “Hwa way”

The name literally means “Chinese Achievement”. And achieve they have:

  •  In 2017, Huawei overtook Apple to become the second largest mobile phone manufacturer in the world. (The largest is Samsung.)
  • They supply the 4G network for Vodafone, Optus and TPG in Australia.
  • They boast a presence in more than 170 countries. There are only 195 countries in the world.
  • Huawei employs 180 000 people globally. Apple has 123 000 and Samsung have 275 000.
  • Eighty thousand of their employees work in Research and Development. They have 15 Research and Development Institutes.
  • Huawei has 800 employees in Australia.

I could go on and on but… “whatever”. That’s in telecommunications and other industries. What do they know about solar? In 2015, 2016 and 2017, and 2018 Huawei shipped more solar inverters worldwide than any other manufacturer. (Measured by total inverter output capacity). Drop the mic Huawei!

The apparent game changer

The reason this new Huawei Solar SUN-20005KTL is creating so much hype is that at first glance at the Huawei inverter specification (see it here) does everything we ever wanted an inverter to do.

  • It’s a “battery ready” inverter at an affordable price.
  • It can connect to the reputable LG Chem battery – like SolarEdge.
  • We can install it without optimisers for affordability as a standard string inverter – like Fronius.
  • We can selectively install optimisers on shaded panels only – like Tigo
  • Or, we can optimise all panels – like SolarEdge.
  • It’s got an inbuilt IV curve tester – like nothing before!

But does Huawei’s inverter actually deliver on what they promised? Read on.

The Huawei Solar inverter reviewed


December 2020 update. Watch the below video to see my latest take on the Huawei inverter – including the optimiser.

There are three things I like about the Huawei Solar optimiser solution. Its electrical simplicity, its selective deployment and its flexible string voltage.

Electrical simplicity

The job of an optimiser is to adjust the panel voltage depending on the sunshine and shading so that the current in each panel is equal. This allows us to achieve maximum power from the system. In the case of SolarEdge, the voltage continuously decreases and increases, or “boosts and bucks”. The Huawei Solar optimiser only bucks the voltage of poorer performing panels in order to increase to the current of the higher performing panels. The Huawei inverter then boosts the voltage as appropriate. In theory, this means simplicity and reliability on the roof.

Selective deployment

A term that I borrowed from Tigo, “selective deployment”, allows us to save on the cost by only installing optimisers on the panels that are going to be affected by shade.  The optimisers cost around $80 each. So if you had ten panels that were not affected by shade, you could easily leave ten optimisers off and save $800.

Optimiser Monitoring

Updated December 2020 Huawei have updated their inverter so integrate what was previously called their “safety box”. The most important feature of the new integration means is optimiser monitoring. This is mostly important so you can easily identify if you have a failed optimiser. But it also allows you to see how each panel is performing. Watch my YouTube video about to see my opinion about the value of panel level monitoring.

Flexible string voltage

The Huawei Solar optimiser solution has another significant advantage over Solaredge. The SolarEdge HD wave inverter works on a fixed voltage of 380V. This means that the string of panels must add up to 380 volts in every situation. However, each optimiser has a boost voltage limit, which is usually 60 volts. In some cases, this means the SolarEdge optimiser is not capable of boosting high enough to compensate the current of the lower performing panels. This results in the lower performing panel actually dragging down the other panels in that string.

The Huawei inverter, by contrast, has a variable input voltage and can work as low as 90 volts. The optimisers only work if there is shade or if panels are installed in multiple orientations. This, in theory, will result in better reliability, and we will avoid the losses that can happen with SolarEdge blocking.

IV Curve Diagnosis

Last year I went to a solar trade show in Munich. The real WOW factor for nerds visiting the Huawei Solar stand was that their upcoming 5kW inverter had an inbuilt IV Curve tester. An IV tester can accurately find a degradation fault within a panel. To put this in perspective, about five years ago, I geeked and bought an IV Curve tester for fun. It cost me about $10 000, and it was a pain in the neck to set up and use.

Now the Huawei SUN-20005KTL can apparently generate an IV curve with just “one click”? Geek me out!

In the previous version of this blog, I complained bitterly because Huawei told me the IV curve function was now not going to be available for residential inverters. As I type this update, I’m in China visiting Huawei’s factory. I just met with Stephan Zhou, Huawei’s general manager for residential inverters. I explained to him why having the IV curve function in residential inverters would be awesome. So, Stephen said he would make it happen – and it will be available by the time I get back home! For free!

I can’t wait to play with it, and I’ll update here once I have.

(For commercial inverters,  you have to pay a small subscription to have the IV function available.)

Huawei Inverter Monitoring Platform

In the earlier version of this blog, I complained about Huawei’s monitoring platform. Huawei of all companies should have an online monitoring platform sorted. And now they have. It’s now a platform worthy of the tech giant’s great name. The platform really shines when you have the safety box (Henry) connected to the inverter and Huawei optimisers on every panel. The level of historical data and ease of use of the platform is impressive. It has an impressive user interface and displays all of the historical data clearly and simply. It leaves the glitchy lacklustre SolarEdge monitoring platform for dead. Having in-depth panel and inverter information on the one platform is also more elegant than using both Tigo and Fronius monitoring.

The Huawei inverter specifications

Voltage restrictions

At the time of writing, the Huawei 5kW inverter is restricted to 500 volts input if you connect it to the current LG battery. Huawei advises me that changes are coming and the battery will soon be able to handle 600 volts. So if you are choosing the Huawei inverter to be “battery ready” then Huawei should have solved the problem by the time you go to purchase a battery.

But forget about installing the Huawei with the LG battery solution as it stands today – because this 500-volt restriction will mean significant power restrictions.

Power restrictions

When we install a solar system without a battery, we are limited by the 33% oversize rule (6.6kW of panels on a 5kW inverter). This regulation was introduced to prevent us from claiming the STC’s on panels will rarely be able to perform to their maximum potential (e.g., installing 10kW of panels on a 5kW inverter).

However, when we install a solar system with a battery, we can legally install as many panels as the inverter manufacturer allows. Installing 10kW of panels on a 5kW inverter with a dc coupled battery is not uncommon. This is because you can use any excess power (that would have otherwise been clipped at 5kW by the inverter) to charge your battery. It’s a financial no-brainer to install more than 6.6kW of panels on your 5kW Huawei inverter.

So how many panels does Huawei currently allow you to install on their hybrid inverter/LG battery? Bugger all. Because of the 500 volt limitation of the LG battery, we have to reduce the number of panels per string. So we’ll choose a higher wattage panel for best results. For example:

  • 20 x 330W QCell panels on the Huawei inverter + LG battery = 6.6 kW. That’s undersized for a battery system.

Huawei advise me they are sorting out this 500-volt limitation, but when that happens, the maximum power oversizing they will still be 7.5kW of panels on their 5kW inverter. 7.5kW hours of solar may be enough for people who don’t use a lot of power, But If your home uses a fair bit of power during the day, 7.5kW of solar may not be enough to fully charge an LG 10kWh battery every day – particularly on rainy days.

Current restrictions

The Huawei inverter has a tiny 11 amp input current. That’s fine if you have a spacious roofline and can put panels wherever you like. But if your roofline is a little more complicated, you won’t be able to parallel strings with standard panels because the current will be over the 11 amp input limit. Huawei tells me they are looking into increasing the current limitation for their next version of their single-phase inverters If they do, that will make the inverter a much more interesting solution.

If however, your roof has significant shading, so you install optimisers on every panel, you won’t need to parallel your strings. (I only recommend optimisers for shaded panels: history has taught me that putting power electronics on the roof for no good reason is just opening yourself up to the possibility of failures.)

The Huawei inverter build

The Huawei inverter is a smart looking unit. When you look under the hood, it appears solid – I would suggest it appears better built than the new SMA.

This statement from the user manual is just a tad concerning.

Do not install the SUN2000L outdoors in salt areas. A salt area refers to the region within 500 meters from the coast or prone to sea breeze.

Huawei explained that this is really just a reflection of the standards they were required to test to. In June 2019, Huawei was performing further accelerated testing to a higher standard so they can remove this ridiculous 500m restriction. Currently, Huawei will permit you to install closer to the beach on a case by case basis.

Sea breeze or not, the Huawei inverter specifications claim the inverter has “natural cooling”. I’ve shown in other blogs, that when SMA and ABB say “natural cooling” they are just kidding. The SMA and ABB inverters have internal fans. But it was nice to see that when Huawei says “natural cooling” they mean “no fan”. An internal fan in an inverter is considered a weak spot – another moving part. But if you don’t install a fan, the concern is high temperatures will shorten the life of the capacitors. However, Huawei claims their secret to cooling the inverter is in component placement and how they use the entire case of the inverter as an effective heat sink.

This is why the Huawei inverter specification states:

“Burn Warning. Do not touch a running SUN2000L because the shell is hot when the SUN2000L is running”.

Well, that’s a tad concerning – or is it?

Huawei smoke test

Huawei Solar inverter thermal imageOut of curiosity, I ran 6.6kW of panels into the Huawei inverter and even paralleled a string to see if I could make it smoke. I got it up to 55° internal. The hottest the case got to was 43.4°, which is just warm to touch. Keep in mind this was in an air-conditioned office rather than a 40-degree day.

I asked Huawei about the burn warning while in their factory in China. They said at 45 degrees ambient temperature, the front of the inverter will get up to 60 and the back will get up to 70. I got out my frypan and heated it to 70 degrees. At 70 degrees, you’d have to deliberately hold your hand there to get burnt. Fair to say that Huawei is being a bit over-cautious with their warning. But don’t be surprised on a hot day if the inverter is hot to touch. On the positive side, natural cooling means you don’t have the problem of fan noise. Noisy fans can be an issue for Fronius inverters when instaled, for example, in a home office.


Huawei is an impressive company and has lived up to its name “Chinese Achievement” by not only gaining a large share of the telecommunication industry but by dominating the solar inverter market internationally.

If you’re looking for a quality inverter for a simple roof with shading on a few panels, then the Huawei SUN-20005KTL inverter is a good option – but Fronius and Tigo will give more flexibility.  If you have heavy shading and need optimisers on every panel, Huawei becomes more interesting. While the safety box is an ugly addition, it is an affordable solution. The safety box gives you a pretty powerful all-in-one platform for monitoring individual panels. It enables rapid shutdown, and now it even offers IV curve testing! But because I only recommend we install optimisers for shaded panels, full deployment is fairly rare.

However, if you want a hybrid inverter or your roof is more complicated, then Huawei has significant limitations (unless you purchase optimisers).  When installed with a battery, the system won’t run in a blackout. The current pairing with the LG battery is useless because the battery voltage limitation restricts the number of solar panels you can install to charge the battery effectively. The inverter’s current limitations make it pretty inflexible. Huawei’s say their upcoming products will solve all of these issues. If they do, I’ve don’t doubt Huawei will have a secure place in the solar industry for years to come.

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87 Comments on Huawei Inverter and Optimiser Review

Devina Rogers said : administrator Report 6 months ago

Hi Leo, Mark recently created a solar battery sizing guide to help explain the complexities with inverter and battery pairings:

DeepAir said : Guest Report 7 months ago

I don't know why I am not able to find these inverters on as well as websites. I see these Huawei inverters are rocking....... they are feature-rich units with the best protection mechanism as one of my friends is already using one.

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Mark C said : administrator Report one year ago

Not a bad idea Adrian. Those Huawei inverters run so hot! would be interested to hear how you make the active cooling.

خرید اینورتر said : Guest Report one year ago

very good article. thank you ... you have a good site.

Mark C said : administrator Report 2 years ago

Hi Vassi, I'm not sure if Huawei sun 200 can do this, but there are settings in some inverters where you set the inverter to run in parallel. You'd best just check with Huawei. If you are technically trying to comply to the new standards 1.25 SCC rule - I would say that's a grey area.

istvan vass said : Guest Report 2 years ago

Hi Mark, "CURRENT RESTRICTIONS" What is your opinion if we bind one string onto two PV input. In this case the current will be the half. Is it works ? In my case the max panel current higher than SUN2000 input. I can see it cuts on 11,3A. And I have only one string. The other MPPT is empty.

Tim said : Guest Report 2 years ago

Hi there, We are waiting since november 2021 on our solar installation. The problem seems to be the power optimizers from Huawei. There aren't any left and nobody knows when they will be available again....??? iS this problem worldwide? Or only in BElgium and Netherlands?

Mark C said : administrator Report 2 years ago

Hi Francesco, Thanks for the info. Yeh, I looked at the Huawei link and seems you are correct. That's impressive. The Fronius limits the total to the nameplate rating :( Incidentally, the AFCI feature on the Huawei inverter is awesome. I've compared it to the few available on the market and it is faultless.

Francesco said : Guest Report 2 years ago

Hello and thanks for the great review. In the TDS Huawei states that an inverter such as the SUN2000-2-6KTL-L1 is able to get up to 9kWp from the PV source, and simultaneously (called 2x power feature) split that power to the AC out for domestic requirement, the battery (up to 5kW due to BMS limit) and the grid (if there is part of the PV source power remaining to deliver). See: This feature seems to be very very powerful, especially considering that other top inverters such as the Fronius Primo GEN24 Plus 6.0 are not able to manage more than 6,2kWp from the PV source. Am I missing something?

Adrian said : Guest Report 2 years ago

Hi Marc, great content ! Congrats ! My question: i will have a pv system installed shortly, with a Huawei 8KTL M1 inverter, and 9,1kW panels. The invertor will be in the garage, but still, should I consider installing an active cooling somewhere below the inverter (just to help the air flow)? Even if 10 yr warranty is available, i would preffer to be safe. Thanks, Adrian

Andy said : Guest Report 2 years ago

Hi Mark & Elliot I thought I would say thanks for your articles on Huawei and three phase/voltage rise. I ended up going for a three phase Huawei system and over a year on I have to say its exceeded my expectations. It runs near silent, is cool running and produces plenty of energy. They have also improved the app and web portal in the last few months and it looks very slick. I just finished watching your videos on Enphase vs Fronius and its interesting that you experienced the same thing I did in that sales people claim benefits on micro inverters or mandatory optimsiers that dont actually appear to pan out in real life. I have been able to compare outputs from a few different people I know with various systems and the non optimised string systems perform well. Not everyone is in a position to have three phase power so I agree that it would be great if they could improve their models in terms of input amps of more inputs. As it stands though I think you need to approach solar like a chess game and look at all the moves that would suit your particular roof. As it is Huawei fit in nicely for a lot of situations as you can always run two strings or run one string optimised and the other optimized. As an example the new SMA 6KW single phase inverter also has a 15A input limit so that would make parallel strings impracticable however at least with Huawei you have that option to run the optimisers to fix that or as Mark suggested you could go for two 5kw inverters and gain 4x MPPT that way. I would love to see more comparison videos or blog posts - eg perhaps you could test a Huawei inverter with, partial and without optimisers and then compare that to SolarEdge and Enphase.

Elliot said : Guest Report 2 years ago

Hi Alvaro, it's not uncommon to see a 5kW inverter temporarily produce a few hundred watts over 5kW. Otherwise, our oversizing blog will help explain why you have that amount of panels to inverter capacity.

Elliot said : Guest Report 2 years ago

Hi Marty. The Huawei inverter still isn't a particularly great inverter, although it does have a few things going for it, the important parts like input voltage and current are still rather limited. Out of the options you've been quoted, Sungrow or SMA would both be good, but over either of them we would still recommend Fronius.

Elliot said : Guest Report 2 years ago

Hi Michael. In that instance, you would get better performance from a standard string system with the 6 west and 6 east panels in parallel on one input and the other 5 on the other input. (you would need an inverter that had high enough current rating to allow paralleling)

Elliot said : Guest Report 2 years ago

Hi Pablo. Coincidently, we are in the middle of testing the APS micro-inverters and will be releasing a video and blog comparing them to Enphase and Hoymiles soon. If you're considering them, I'd recommend holding off until the end of our tests.

Alvaro said : Guest Report 3 years ago

Dear Mark, thank you for your videos. I have a question. My PV installation has 6.7 kW and a Huawei SUN-20005KTL. Can this inverter deliver more than 5kW or is the maximum output instantanous active power límited to 5 kW? Thank you very much.

Gary Storm said : Guest Report 3 years ago

I wish you could service Perth. Thanks for all your informative and honest content. We are looking at 6.6kw/5kw inverter, on a 3-phase house, with the ability to add a battery and more panels later (better price/performance)... unless we just go 'the hell with it' and do it all now. One company here is quoting on Huawei inverters and battery, so this review was invaluable. It seems the only battery the 3-phase system will take, is a Huawei.... so pretty limiting if I wanted to add any other brand in future. So I guess I'll be saying no to the Huawei inverter, due to the battery limitations.

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Pablo Barrios said : Guest Report 3 years ago

Hi Mark! First of all thanks for all the insights, they really help. I have a roof with moderate shading and my solar advisor is suggesting APSystems QS1A-NA (1500 W) micro inversor. After seeing the Huawei reviews im not sure how to proceed... Any suggestions?

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Paul Jones said : Guest Report 3 years ago

Hello, I'm worried my Huawei hybrid 5kw inverter(1st model) will burnout and DIE early....The FUSIONHOME monitoring Graph POWER CURVE is more JAGGED than a Sharks Smile...No google IMAGES like it !!! Over 40 peaks and troughs daily even cloudless sky....6.6 kw Seraphim panels 9east 11west no shading in Perth.....Overall production still ok up to 40kw/day recently.....Just worried excessive SWITCHING will KILL electronics ?? Thanks Paul.....

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michael Lecomte said : Guest Report 3 years ago

If the Solar modules are on different roof sides, for instance 6 modules oriented east, 5 south ans 6 west, dont you think that optimisers improve performance ? Mike

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Mark C said : administrator Report 3 years ago

Hi Marty, Yeh look up my Huawei inverter review. In short, I like it for a Chinese inverter. I would only get it if you have minor shade issues though. If you don't have shade, go Fronius or Sungrow. If you have heavy shade, go Enphase. And I would get a better panel than Jinko. Generally Speaking, non-Chinese Panels are much better than Jinko.

Marty K said : Guest Report 3 years ago

Hi Marc, have decided not to buy a solar edge inverter with my new system, and am curious whether MC Electrical has had a chance to try the newer Huawei Sun 2000 - 5KTL- L1 inverter (Or the 6) which I hope to get with 17 x 370 watt Jinko or Trina panels. Q. 1. Any news or testing done on the newer Huaweis? Q. 2. Jinko or Trina for a townhouse , limited rood space E and North orientation. By the way , I was referred to you by one of my solar quote guys.. nice of him to refer you!

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K K said : Guest Report 3 years ago

Hi Mark, do you have an update on the “wah way” inverters and their optimisers? Who would I contact to find Huawei installers down in vic? You can email me if that is easier. Thanks.

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Mark C said : administrator Report 3 years ago

Hi Michael, the advantages of going three phase in qld is that you can install a larger system, but also you will minimise voltage rise. ------- We've installed the new Huawei inverter. It's a good option if you have shade on just a few panels between about 9 and 3. If shade is significant between 10 am and 2 pm, I'd go Enphase. Otherwise Fronius. We only install in South East Qld.

Marty K said : Guest Report 3 years ago

Just checking to see if the new Huawei are out yet, and if you have seen or tested them? Am looking at a 6.3 kw system non - shaded , and have been quoted Trina 370 x 17 , and either sungrow, SMA, or solaredge inverter. I also may want to charge an Electric car, I read your June 2019 review on Huawei inverter, and wanted to know if there was a new model number, which incorporates some of the improvements you recommended, and have discussed with Huawei. Cheers !

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Mark C said : administrator Report 3 years ago

Hi Michael, Sounds suss to me. It may be something to do with the state you are in requiring a balanced load across phases. I'd find a local electrical contracting company who you can trust to quote. The rules can be complex so you'd want to know you can trust the company, or get them to show you the relevant rules to back up what they are saying.

Andrew said : Guest Report 4 years ago

Hi Mark Thanks for the great review in particular also point out some of the areas that needed improvement. After a lot of research I went with the 10KW M0 3P model. This addresses the issues you mention with the first model of 1P inverters in that the safety box is integrated (also integrated DC switch), it has a very generous volt/amp range with 4 strings (22A per MPPT) and the battery interface is now higher voltage. I agree with you that the build quality is phenomenal, in fact in the flesh running at full tilt its more impressive than what you would see from photos in that the outside is barely warm, its almost silent and its large heat sink at the back is warm enough that its shedding excess heat but not crazy hot. From what I can see its particularly efficient in its inverting which I am sure helps reduce wasted energy being turned into heat. Probably the main thing that attracted me to the Huawei however is that they have a particularly generous warranty that actually specifies turn around time and very few exclusions. It looks like they were actually pretty smart about it too designing the system to have protection against everything imaginable including arc detection. I think its important to have quality solar options available on the market. We see a lot of competition for cheap inverters however not a lot in the premium inverter space and in particular we dont see that much innovation/R&D with the cheaper brands often being inferior copies of existing products. I would actually be happy for you to contact me for more info or even have a look and update your review with the new model.

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Hans said : Guest Report 4 years ago

Hi Mark, I’ve read the article and all the comments, thanks so much. Do you have any update about the ‘new’ Huawei inverters that should be out now or any day (according to previous estimates)? I am seriously considering a 5 or 6Kw single phase Huawei, ready to sign whatever contract I go with in the next couple of weeks. If not that then it would Probably be a Fronius. Might be going with SunPower p3 415w commercial panels (but that preference may change with the wind). I’m on single phase (in Vic and with Ausnet) limited to (pre-approval) 3.5kw export and 8.1kw inverter capacity. If the ‘new’ Huawei fixed the EPS issue it would sell it for me and if it is actually coming out soon I would wait- I would also fork out extra right now for a Enphase IQ8 system if they were available for this same reason, but I don’t want to wait till what seems like next year at least for them? As you have so eloquently made clear to me in your writings AC coupling a battery will be pretty useless for our 8.1kw inverter limit. DC coupling later might be OK. Being on pumped tank water semi rural and working from home, EPS or ‘grid agnosticism’ would be fantastic. Cheers,

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Michael Balmain said : Guest Report 4 years ago

Hi Mark, First of all, thanks for your informative blogs! I've looked up a few different things relating to solar and your blogs always come up. I live up in far north Queensland and our house is surrounded by trees meaning there is going to be shade on our roof at times. Our house is also on 3 phase power. I'm after a 13kw system. What is the advantage of having a 3 phase inverter compared to 2 single phase inverters which I have been quoted for? Also, do you have an update on when Huawei will be releasing their new inverter? Do you do installs up here? Thanks for your time. Michael

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Michael Mack said : Guest Report 4 years ago

Hi Mark, I have been told that we have 2-Phase electrical connection which would require two inverters instead of one to cover all that is connected. So instead of a single 5kW inverter I am told I need 2 x 5kW inverters for a 6.6kW system as there are no smaller size Hybrid inverters available from Huawei? Do I really need two inverters for 2-phase connection and is it right that Huawei only has 5KW hybrid inverters? Thanks heaps.

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Leo said : Guest Report 4 years ago

Hi Mark. Enjoyed your article. I'm in the process of getting info on installing solar. Currently, I've been given options on JA 315w, Risen 330w & Longi 350 Half-cut panels with and without battery. They include a Huawei 10kW 3ph Inverter. The battery is a LG RESU6.5 with a Goodwe5000S-BP 5kW charger. I don't understand the 5kW charger with the 6.5kW battery. Sorry if this academic but I'm still catching up with technology. Cheers, Leo

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Mark C said : administrator Report 4 years ago

Hi Joanne, Firstly, Trina is not premium. It's not a terrible panel, it's just another budget Chinese panel. 330W means at least it is a decent Chinese panel. Regarding inverters, It's a hard call. The Fronius Gen24 is most likely a better inverter but they don't have their own battery. The real question is, why go battery ready? It's most likely won't be financially viable to get a battery for a long time. So you'll have a battery charger for a battery that you may or may not get in the next 5 year. Instead, I'd say just get a Fronius Symo inverter and plan to connect a tesla Powerwall or another AC coupled battery to it when the time is right. I wrote a blog about the difference between AC and DC-coupled batteries here:

Joanne Burke said : Guest Report 4 years ago

HI Mark I am just about to go ahead with solar and came upon your page. I have been quoted on a 20 x Premium Tier 1 330 w Trina Honey Black mono perc half cut solar panels and a Huawei 5 kW Three Phase Inverter with Wifi monitoring.(which I have been told i can add a battery to). I am wanting to know if am I better off with a Fronius Symo Gen 24 or the new Huawei residential inverter with the integrated safety box and Huawei battery compatibility which you mention should be out by June? I would really appreciate you opinion on this as I am completely lost. Kindest regards Jo.

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Mark C said : administrator Report 4 years ago

Hey Jason. I'm in regular contact with Huawei about it and just a bit excited. The new Huawei residential inverter with the integrated safety box and Huawei battery compatibility should be out by the end of June. We'll generally only use it for the selective deployment of optimisers, (if you have several panels in the shade). And, it will only available for up to 6kW inverters. You could install 2 x 5kW inverters. Or ... check out the new Fronius Symo Gen 24 will be out soon. I've got a pre-series model installed in my office. It looks awesome. The only problem is battery compatibility is still coming, and it won't be a Fronius battery - it will be a BYD. Another option is just to keep it simple and stick with AC coupling a Tesla. That's my current battery advice.

Mark C said : administrator Report 4 years ago

Hi Denise. Huawei seem fairly decent from what I have seen. As a stab in the dark, that figure seems in the ballpark for summer production. But if that is all the information that you have been given on production, I'd be concerned. It depends on panel size, orientation, shade and location. You should have had a monthly breakdown. Eg, December will do an average of 70kWH a day, and July will do an average of 30kWh a day. It's information that we can get easily get fairly accurate with basic design tools. If your installer was a CEC approved retailer, they have to give you that info. If they didn't, ask for it and let the CEC know.

Mark C said : administrator Report 4 years ago

Hi Andre, I agree with your take on Tigo. I have to update my views on Tigo to reflect the high failure rate and poor support. I also visited their HQ in silicone valley last year and was less than impressed. However, Huawei doesn't warrant their optimisers on other inverters - because they are in the business of selling inverters, and the optimiser is just an add on. Huawei has suggested it would probably work fine - but knowing the issues that Tigo can have, I wouldn't be trying an untested solution on my customers install. If it were me - I'd use Tigo. They seem to work most of the time. BTW, when Huawei come out with their new residential inverters later this year, we'll drop Tigo and switch to Huawei.

André Brosda said : Guest Report 4 years ago

Hi Mark, I have to use some optimizers for mixing modules and a small shade situation. I was first looking at TIGO, but their optimizers seem to have strange issues. And the support seems to be "strange" at least here in Germany. Have you ever tried the Huawei optimizers on another inverter? E.G. used a Huawei with SMA or Fronuis? My Dealer told me it should work - I'd like to test it, but I don't want to be the customer with probably dead optimizers. I figure: No fancy graphics when using Optimizers with SMA? regards André

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Denise Borg said : Guest Report 4 years ago

Hi Mark, I have installed a Huawei 15KW system on my roof today, would you say the 15KW inverters are good, with the 44 panels they are saying it will produce 60 KW each day, does that sound right to you.

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Jason said : Guest Report 4 years ago

Hi Mark, Great article above! Have you heard if Huwaei have updated/released their inverters yet to include the safety box and the EPS? I'm after a 10kw inverter and not keen on the noise from a Fronius.

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Mark C said : administrator Report 4 years ago

Hi Matt, Sory for the delayed reply. My thoughts are that Huawei is a great option if you have shade on a few panels and you want to use it for selective deployment (optimisers on a few panels). If not, go with the tried and tested Fronius inverter. It's a similar price. The Huawei inverter is fairly new, so I tread with caution. My opinion for all optimisers and micro's is you should only use them if you have shade etc. However, if you need optimisers - so you choose Huawei, wait for the new model that should be available mid-2020 or before. That is what we will use if there is shade on just a few panels. It will be significantly superior to the current model (which we are not installing).

Mark C said : administrator Report 4 years ago

Hi Pat, Yes I met with Huawei recently and they tell me the 500m restriction is no longer! Wait another few months thought, some big changes are coming, and we will probably start selling Huawei then.

Pat said : Guest Report 4 years ago

Have Huawei lifted the 500m restriction from the coats? If not how do you get approval to install within 500m of the beach. We are 410m from the beach and would like to go with the Huawei inverter.

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Matt said : Guest Report 4 years ago

G'day Mark, Just want your thoughts regarding the Huawei SUN2000 5kw 3 phase inverter as i am considering this for my residential property. They will be paired up with Q Cells Peak Duo G5 330W panels. Have you had much experience with the 3 phase Huawei Inverter and can you see any obvious flaws and restrictions similar to the single phase version? Also would you recommend this inverter and feel that it can last 10-15 years if it is installed in a garage and not out in the elements? Cheers,

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Markusz said : Guest Report 4 years ago

The use of IV curve only possible when optimizers installed or otherwise? Thanks

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Mark C said : administrator Report 4 years ago

You make a good point Fred. Yet so many companies in Brisbane still sell batteries. It may be a good way to weed out a good company: ask them is it worth buying a battery.

Fred Dickman said : Guest Report 4 years ago

Hello Mark I have just read with great interest your review of the Huawei Inverters. I'm quite a fan of their inverters particularly the commercial sized inverters, as we do a lot of installs around 100kW. However I'd like to mention something about the increasing use of battery solar. I spent a large part of my working life in the investment industry and always consider the ROI. It is often said that a battery system will take around 10 years to pay for itself. To my mind it's more like 115 years. It appears that about the best FiT one can get in Qld is 16.1c per kWh from Energy Australia . So if I feed 10kW into batteries during the day I am foregoing $1.61 per day. At night time I draw down 8 kwH and save $1.848. Whoopee I have saved 23.8 cents! At an additional cost of around $10,000 dollars for my battery system I will save around $86.87 pa. $10,000 divided by $86.87 = 115.11 years payback period. Am I missing something? Regards Fred

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Mark C said : administrator Report 5 years ago

Hi Austin, Thanks. No, I don't generally deal with 50kW inverters. I have been meaning on doing a comparison on the 29.9kW inverter. It sounds interesting at face value.

Austin said : Guest Report 5 years ago

Hi Mark, Great review on Huawei. We are considering them for commercial installations. is there any review for the 50kW commercial inverter yet? EW commonly use Fronius ECO range inverters for commercial, but always considering options .

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Mark C said : administrator Report 5 years ago

Hi Sam, No everything I mentioned will only be in the next model.

Sam said : Guest Report 5 years ago

Are the updates for the battery issue going to be backwards compatible ie can you upgrade the current unit or will it be a version 2?

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Ivan said : Guest Report 5 years ago

If an inverter gets as hot as you wrote it here, I'm assuming it will reduce the inverter's lifetime, and I think the inverter will derate and give less power at higher temperatures. Then I would prefer an inverter with active cooling. But also to my information Huawei claims natural cooling for the bigger inverters, but also have fans inside. For me Huawei inverter only look great on the data sheet, but I do not expect, that they run very well in their natural habitat, especially at higher ambient temperatures.

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bruce said : Guest Report 5 years ago

if the inverter gets to 70 degrees I wouldn't go near it

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Mark C said : administrator Report 5 years ago

Hi Andrew. I'm working on this Enphase blog atm. Here's a sneak peek!

Andrew said : Guest Report 5 years ago

Agreed on the undesirability of RHI's! I guess the Aussie Standards don't recognise "rapid shutdown" at the panel level. I've got a hunch that in a future version, the standards people might make RTI's non-mandatory if you install panel-level "rapid shutdown". Do you reckon the Huawei safety solution (and the Tigo etc equivalent) provide a good, safe solution to the issue that RTI's were trying to address?

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Mark C said : administrator Report 5 years ago

Hi Andrew. Unfortunately not. If you could then I'd be doing full deployment everywhere!! :) The installer reference group is pushing hard to eliminate RTI's.

Leon Balym said : Guest Report 5 years ago

Hi Mark, Just asking what your thoughts are of the Enphase System with IQ7 micro-inverters?

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Andrew said : Guest Report 5 years ago

Hi Mark - I know you don't advocate "full deployment" of optimisers, but if you do this on a Huawei with a safety box added, can you omit the rooftop DC isolator?

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P said : Guest Report 5 years ago

Hi Mark very in depth review. I note this page and this advice ------------- Let's say you are trying to decide between a Fronius Primo and a Huawei hybrid. If you buy the Primo ($2,220 installed) then you know that it will cost you $12,000 to add the Tesla Powerwall 2 later, making the total cost $14,220. If you buy the Huawei it will cost $1,800 (installed) and then $8,800 (installed) for the LG battery and $350 for the installed smart meter, making a total of $10,950. That saving of $3,270 is why so many people are choosing hybrids now when they are buying a complete NEW solar install. The real beauty is that you are paying no more upfront, in fact a little less, so if you never install batteries you don't lose out, and if you do, you have the same choice of plugging in whatever the hybrid works with or any of the 'AC Coupled' solutions like Powerwall. ------------- They are obviously impressed with the Huawei but your review leaves several short comings and a dont buy . However the above link / site listed says ------- MC Electrical in Queensland, a solar company we have a great deal of time for, wrote a review on their website shortly after Huawei first released their residential hybrid in January 2018. Mark's review was pretty accurate back then, but the steady stream of Huawei upgrades has answered every criticism. -------------------------------- Is this true has Huawei now a year later in March 2019 answered your criticisms? do you have a fresh review post? thankyou

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Mark C said : administrator Report 5 years ago

Hi Shishir, To be honest, I don't really know. I didn't find evidence of it running too hot, but I certainly test it at 45 degrees.

Shisher Shrestha said : Guest Report 5 years ago

Hi Mark, Congratulations on a great review. We are looking at Huawei's inverters for commercial rooftop projects that we plan to install in Nepal. The ambient temperature in some regions may get as higher as 45 degrees centigrade and I am a bit concern about their cooling system. I am looking forward to your comments. Thanks

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Mark C said : administrator Report 5 years ago

Thanks, Robert - fixed. The IQ 8 is going to be huge. We're looking into doing some off-grid projects on the in Vanuatu. The problem for us with the Enphase battery is it can only ever be AC coupled. Regulations at the moment make us allow inverter and battery capacity together, so on single phase that's only 10KW of batteries and solar inverter. It's just not nearly big enough for even a small home.

TJ Roberts said : Guest Report 5 years ago

Very informative article. f.y.i. SolarEdge hyperlink was broken. Still prefer Enphase IQ micros for the 2-wire simplicity, panel-level monitoring, multiplicity giving reliability, and low-voltage DC-to-AC conversion for longevity. Waiting on the IQ8 ACM's allowing a battery-less microgrid solution.

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Mark C said : administrator Report 5 years ago

Hi Gustav, Yes, I was testing a single phase inverter. I'm not sure what Huawei does in the 3phase and optimisation. I do know they are working on fixing the problems I addressed, so hopefully time for an update soon.

Gustav said : Guest Report 5 years ago

Hey Mark. Great blog, read a lot of your posts. When trying Huawei optimizers, did you try them on a single phase-system? I've heard the Huawei optimizers are only for single phase inverters. Can you confirm this? In many of your posts you seem to be adressing one phase-systems, would help us readers if you'd be more detailed if the example of a system that you're adressing is a one phase system or three phase system. In Sweden where I'm installing solar systems one phase systems above 3 kW aren't allowed by many of the grid operators, so here mostly all solar systems installed are three phase systems.

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Mark C said : administrator Report 6 years ago

Hi Luke, I don't think Henry is available yet. I definitely wouldn't go with SolarEdge - my concerns about them have grown after a ridiculous number of installers have contacted me and had similar or worse complaints. I would use Tigo optimisers and a Fronius inverter. I'm in the middle of testing them and all the feedback I hear about them is Tigo really reliable - that blog will come out in a few weeks.

Luke said : Guest Report 6 years ago

Hi Mark, Any update on Henry-the-Octopus? Do you have one? Does it work? I've got a situation (some winter shading to the NNE thanks to a neighbour's tree, clear sky to the WNW, flat roof) where the ability to have optional optimizers on only some panels appeals. What would you recommend if not Huawei? Should I look into SolarEdge despite your recent concerns? Thanks for the thorough reviews, the most informative I've found. Regards, LR

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Esmail said : Guest Report 6 years ago

Thanks Mark, you offer an educational blog that every CEC installer should visit and learn from your time consuming reserch and the updates that you follows up, and thus we benefit by avoiding the mistakes that we can make in the product selection We are grateful and many thanks you and team Esmail of Solar Hybrid Solutions

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Lothar said : Guest Report 6 years ago

HI Mark, Thanks, I'd definitely like to pop round and have a listen. I see you are in Eagle Farm? I work the normal 9-5, what hours would I be able to pop round? If its noise is not a problem for me, I may consider taking it off your hands if you are still wanting to pass it on.

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Mark C said : administrator Report 6 years ago

Hi Lothar, I do remember hearing a noise when we had it running. It didn't bother me. We could connect it back up and run it if you want to drop around sometime and have a listen.

Lothar said : Guest Report 6 years ago

Hi Mark, I have a mate who has one of the three-phase Huawei units and says it emits a very loud 8000Hz ring, that even with it in the garage and all doors and windows closed could still be heard inside. They even stuck soundproofing foam on it to try dampen the sound. Despite the shortcomings you list. I'm still interested in getting one of the 5kW single-phase ones for my house. BUT I need to know if it emits any high-frequency noise. I'd really like to know if you notice any noise from yours and whether you could use one of them phone apps to check the sound from it while it is running. I cannot stand high pitch ringing. Or could you put me in touch with someone in Brissy who has one of these operating? Much appreciated.

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James said : Guest Report 6 years ago

Another great review Mark, cheers!

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Mark C said : administrator Report 6 years ago

Thanks Josh. I'll have a look. I'm looking forward to testing Henry.

Josh B said : Guest Report 6 years ago

Hi Mark, Just letting you know the new NetEco website has been updated. Looks very useful compered to the last version. heaps of custom comparisons.

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Mark C said : administrator Report 6 years ago

Hi Auston, Thanks! Great to get a perspective from a previous insider! The old "promised features that are never released" trick, eh? I haven't even looked at the commercial inverters.

Auston Taber said : Guest Report 6 years ago

Hey Mark, I worked at SMA for 6 years and then at Huawei for 1.5 in the US as one of their service managers. I can attest to the durability of the hardware, probably one of my favorite inverters to have personally handled. The software side, and the promised features that were never released was a huge issue for me. You really hit the nail on the head with this review. I was never able to see the resi model, but the commercial units paralleled your review exactly. Pretty impressive review. Thank you.

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Mark C said : administrator Report 6 years ago

Hi Fred, No Fronius Do not have an IV curve test inbuilt. This feature is unique to Huawei as far as I know. I'm not sure I get the second part of your question, but Fronius seems to do a good job at cooling with the Fans. The fans also seem to be reliable to me. (Have a read of my recent Fronius blog.

Fred said : Guest Report 6 years ago

Mark, I have some questions: do you know if Fronius models have IV curve diagnostic? Is it possible to you compare resources to failure investigation between Huawey and Fronius models used to commercial necessities? I saw Fronius speaking well about the advantages of the its active cooling in comparison with passive cooling of the Huawey. What you think? Thank you!

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Mark C said : administrator Report 6 years ago

Hi Andrew. Because Solaredge has a fixed voltage they can overcome this. Other inverters could have a higher input current. With Huawei, it's a lose/lose. Changing to 600v will only improve it marginally. It will be interesting to play with Henry when he comes :)

Andrew said : Guest Report 6 years ago

Thanks Mark. Hopefully LG will upgrade their DC isolator beyond 500V soon. I presume the same issue applies to ANY inverter trying to use the LG battery, not just Huawei? EPS not an issue in Perth (ultra stable supply here) and no word in Huawei's reply to me about when its coming. Completely understand that SA, QLD and other places with frequent power outs would want it. Henry the Octopus and updated NetEco software should be here end of August..can't wait to check out the IV Curve tester.

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Mark C said : administrator Report 6 years ago

Hi Andrew. Thanks for forwarding this on to Huawei. I was in talks with them and met them as I was writing the blog. They knew that I was blogging about them and I made a big deal about my issues to make sure I got the best information from them. I didn't really trust the advice I got. (For example, they also said there are no capacitors in the optimiser, which there clearly are). The reason for the limitation is the DC isolator in the LG can only handle 500v. We confirmed this was the case with LG during an LG training session. I'm meeting with an investor in Israel to discuss this blog on Tuesday, and have talked to another one in New York. Huawei is clearly making waves and has good reason to get the safety box working. However, It was announced last week they are being sued by SolarEdge. They almost exactly copied the SolarEdge optimiser. Interesting times!

Andrew said : Guest Report 6 years ago

Hi Mark. I forwarded your Huawei review to Huawei Australia for comment and this is an abridged version of their reply.... 1.The Smart Safety box is working very well to build the communication between panels and inverters. NetEco monitoring app is being updated for panel monitoring now, orders have been placed by One Stop Warehouse for delivery within 2 months. 2. We have EN60068-2-52 Type D certification to prove our IP65 against salt-mist nearby the sea, we also have some projects nearby the sea (Japan). 3.The cover temperature is quite high because we are using a metal material, but the inside temperature is much lower as we have patented natural cooling design. The warning on the label is normal. It does not mean we have a bad cooling system. Mark... I have also asked them to further clarify their answer regarding the max input voltage per string of 495V when LG battery connected. At the moment they simply say... The max input voltage will be decreased from 600V to 495V due to LG battery limitation we have marked it in the datasheet. I'll let you know the reply. However, with a typical 275W panel having a VOC of 34.9V at STC, and a VMP of 28.3V, and a more realistic voltage closer to 26V, I am struggling to see why you can't put 14 panels on a string anyway? Perhaps you can explain?

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Mark C said : administrator Report 6 years ago

Hi Will, Thanks! The Sungrow Hybrid can also only take 1 string per MPPT, but the voltage input is 600v, so we can string 13 or 14 panels into one input (depending on the panel.) How do you work it out? I'm taking a long flight to Israel next week, and on the plane, I'll be writing a blog to answer that question :) My impression of the solax is that it is junk, but haven't looked at it for a long time. It's on the "to Blog" list.

Will said : Guest Report 6 years ago

Hi Mark, thanks for the very informative review. I also read/watched your review on Sungrow hybrid inverter SH5K+. I would like to know how many standard panels can you put on each string/MPPT on the Sungrow SH5KT or Fronius Primo 5kw (international version)? How do you work it out? Also can you parallel into one input (MPPT?) if using the Fronius or Sungrow? What do you think about the Solex x-hybrid gen3? Many thanks.

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Mark Cavanagh said : administrator Report 6 years ago

Hi Stephen. I wrote a blog a while ago now on Redback. I had a lot to do with it back then, working with them on battery warranties and giving feedback on their product etc. Redback was flawed from the beginning. In Phil Livingstone's own words, they "are a software company - not a hardware company". They are trying to create all these futuristic head in the sky type things, but they have missed the fundamentals of having an inverter that actually works.

Stephen said : Guest Report 6 years ago

Hi, What do you think of Redback smart hybrid inverter? Regards

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Mark Cavanagh said : administrator Report 6 years ago

Hi Terry, no, it is available now as their website says ..... .....(The image with the house says the safety box was available in q1 2018.) ..... ........ I've talked with 2 wholesalers who are selling them and have heard others in the industry who have installed them too.

Terry said : Guest Report 6 years ago

Hi Mark, Seeing as you've had this inverter for three months is it possible you were testing a very early release as I understand it's not being released until Q1 2019.

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