[parimm]

Mordern batteries last a lot more than one year. Tesla is providing ten year warranties on their batteries for their daily cycle batteries. https://www.tesla.com/powerwall

[Annatar]

They do? I guess that explains why my UPS's, running on the same type of batteries, would be regularly shot after a year and I'd have a power outage. And I have industrial uninterruptible power supplies, with the current going through them, just like how they would be used in a solar panel scenario.

Don't believe the hype. Modern batteries are junk.