[ericd]

The 25 year thing comes from the 25 year warranties - they’re generally warrantied to be at 80% power capability at 25 years. I don’t know the real lifetime, but presumably it’s a lot longer than 25 years. And by that point, maybe we’ll have the deuteriumdollar…

[PaulDavisThe1st]

The first set of PV panels I put on our van didn't even make their 10 year warranty @ 80%. Anecdata, sure, but still data.

[SlightlyLeftPad]

Being mounted on a moving vehicle subjects them to a much more dynamic and hostile environment than having arguably better quality, fixed panels sitting in a dry desert for 25 years. I’m actually impressed that yours lasted 10 years.

[ericd]

Interesting, most of the anecdata I've heard elsewhere (for residential solar) goes the other direction - that they degrade slower than expected.

You're sure there are no dead microinverters involved, right? I guess that'd be more than 20% on a van.