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My cells are rated for 4000 cycles which is ~11 years.

At 10% years they will have 80% of capacity.

A-grade cells are often rated for 6000 cycles.

It’s amazing. I've updated the article with those numbers.

Yes, usually around 3k charges before reaching 80% capacity, which is around 10 years.

I have an LFP battery from EcoFlow, and now I am more worried about the inverter or BMS failing before the battery cells. End of useful life really isn't until 50% battery capacity, which could 30 years out.

Yeah, that's why all the recent sprinter van conversions are using them for the "house" batteries.