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6 Comments on Solar Battery Pay Back Calculator

Elliot said : Guest Report 2 years ago

Hi Greg. Thats a great question. When we designed the calculator, we made the assumption that your solar system would be designed (sized) according to your consumption habits. When we design an export limited system, we try to only oversize by a similar amount to the house's base load during the day. If however your house is not consuming the difference between the export limit and the output, then yes... That would be a more favourable situation for the battery pay back.

Mark C said : administrator Report 4 years ago

Thanks for the feedback. We updated it to suit. I'd also be happy if I were still here in 72 years! :)

Ian Porter said : Guest Report 4 years ago

Great little calculator but we need to understand that it is not just about raw payback times. Energy security has an added value in places where frequent outages occur especially where people are pumping their own water, etc. Just saying!

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Greg Gibson said : Guest Report 4 years ago

Would export limiting also be a factor to consider in evaluating home battery economics? eg, low daytime consumption + high overnight consumption + 10kw system = more favourable battery payback? The calculator seems to assume that all power not consumed can be exported. Cheers.

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Tim said : Guest Report 4 years ago

Your calculator does not allow for the 35c we pay in SA. I’d be happy with the 72year payback, long as I’d still be here in72 years. Cheers Tim.

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rudy said : Guest Report 4 years ago

Also in Italy the payback is more than 10 years. No way now for batteries. Thanks

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