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‘If 1.5m Germans have them there must be something in it’: how balcony solar is taking off
(www.theguardian.com)
this post was submitted on 11 Feb 2025
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Wrong question. The right question is: is the solar panel able to be CO2 neutral (at least) or CO2 negative. We don't get anything out of it if producing the solar panel costs more CO2 emissions than it saves by producing electricity.
Before you ask: I don't know the answer. I was looking into this thread in hope to find it.
Most people don't care about being CO2 neutral. The real question is what is the ROI? Will the panel save that person money. If it takes 50 years to pay for itself, I'd say that's bad. 10 years is more standard. 5 years I say it's a no brainer. Though I suppose you can also argue value for utility, if that is giving her the ability to power something off grid that would be worth something.
In Germany those panels usually pay themselves after about 5 years depending on the price of the necessary electronics (don't forget the electricity meter!) and if there's also a battery.