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A comment on What a year of solar and batteries saved us in 2025. Parent comment

Re:What a year of solar and batteries saved us in 2025 by boplicity on Tuesday January 13, 2026 @12:26PM (#46604307)
Why would you need to replace the batteries? Do they fail outright at around 10 years, become unsafe, or do they just lose capacity?

Curious!

Even if they're at 50% capacity, they would still work, right? But if there are other considerations, especially safety ones, then that would definitely be a consideration. I'm not sure where to learn about this type of thing.

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Re:What a year of solar and batteries saved us in 2025 by mbesto on Tuesday January 13, 2026 @12:40PM (#46604590)
> Do they fail outright at around 10 years, become unsafe, or do they just lose capacity?

LiFePO4 generally degrades to 80% capacity after 10 years, that's it. Safety isn't an issue.

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Re:What a year of solar and batteries saved us in 2025 by lostapathy on Tuesday January 13, 2026 @02:04PM (#46606052)
At which point if you're short on capacity (but who knows how your demand might shift over a decade) it's not like you need to replace the original batteries to get that 20% back, you will probably be able to just expand the pack to bring the capacity up.
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