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> you don't run out of power once the batteries have depleted That's definitely true if you charge only via grid, but my friends who got a powerwall bought it
by gopalv 4y ago
> you don't run out of power once the batteries have depleted
That's definitely true if you charge only via grid, but my friends who got a powerwall bought it because they need to off-set the 9 AM to 3 PM solar into a 6 PM to 10 pm usage scenario.
Their bet is that in case of an earthquake that doesn't hit their house directly, the solar + powerwall + EVs is a more survivable setup compared to gas pipelines or a propane tank on-site.
The other plus side is that they use the device every day, so if it isn't working, they'll know in a day - the previous experience portable generators (though admittedly it is just "burning man" every year) says they need last-minute wrenching if they're idle all year.
- nnf 4y agoThis is exactly why I went with Powerwalls. The batteries charge during the day from our solar array and then we use the stored electricity at night. I've only had the Powerwalls for a few months, but we've already had several four- and five-day stretches where our production was high enough and our usage low enough that we didn't buy any power from the utility at all. Contrast this with previous average power bills in the $400/mo range, which are now down to $15/mo. There have also been a couple of brief power outages (5-10 minutes) where the only reason we knew about the outage was that the utility texted us about it before the Tesla app notification appeared on my phone.
- philwelch 4y agoYeah, powerwall + solar is definitely more sustainable.