Warrantied to what, though. That you can still get 20% capacity levels in year 10, or that it will still turn on? This might be considered "normal wear and tear."
3000 deep cycles is really pushing what the industry knows to be state of the art.
Maybe they are just taking the economic chance that most people won't be deeply cycling these batteries, and planning to do replacements for those who actually put it through its paces.
That's a good question, and it makes a big difference.
> That you can still get 20% capacity levels in year 10, or that it will still turn on? This might be considered "normal wear and tear."
Given that you can optionally warranty it for an additional 10 years, I doubt it's nearly that bad. If people are confused as to how they how they hope achieve 10 years reliability, and they are willing to warranty 20 years, they must have something up their sleeves.
> 3000 deep cycles is really pushing what the industry knows to be state of the art
I suspect that the powerwall's true capacity is higher than it's rating, and it uses that reserve so it's not doing deep cycles, similar to another commenter's assertion to how the Prius gets it's 7+ year rating,
> Maybe they are just taking the economic chance that most people won't be deeply cycling these batteries, and planning to do replacements for those who actually put it through its paces.
I think a combination of most users not fully cycling every day, extra reserve capacity to keep it from deep cycling, and some subset of people not using failing warranty conditions may all contribute.
3000 deep cycles is really pushing what the industry knows to be state of the art.
Maybe they are just taking the economic chance that most people won't be deeply cycling these batteries, and planning to do replacements for those who actually put it through its paces.