this post was submitted on 17 Nov 2024
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I didn't mean they only last 2 years but battery degradation is a pretty common and known thing.
By a quick search I didn't find any claim of storage battery lifetimes outside of 10-15 years, so there doesn't seem to be a breakthrough in tech I wasn't aware of. 15 years is hardly the lifetime of a house, so you certainly don't "buy only once".
Solar panels also don't work indefinitely but their efficiency degradation is more on par with the lifetime of major parts of the building, like the roof itself.
The comparison commodity was Gas. Does something that can only be consumed once even have a lifetime?
Sure, but the cost of batteries is at the point where even with replacements every 10-15 years you'll spend less than you would buying power from the grid.