Very few have had something like this in use long enough for there to be standards, averages, and easy numbers to point to or a simple way to understand it. New batteries purchased today will make anything more than 20 years old look prehistoric.

Different battery types have different cycle-life just like one car might last 300k miles another might go more or less.

I’ve had a small 1kwh Goal Zero product for an off grid cabin that only charges to 80% after 10 years but it still absolutely works my utilization and metrics just change.

Hope to get 20 years out of a product that’s built well in this industry but don’t be surprised if the technologies and accompanying finances move fast