I’d like to update you on our Powerwall experiment, and there’s a special reason I’m doing so at this moment.
EDITED TO ADD: update at the end of this post.
We’ve had the giant battery attached to our house since early May (posts here), and for a while progress was uneven. Sometimes it worked, fueling selected devices during short outages and tests. Other times it failed, either when needed (when the power went out) or on its own.
Ever since my glum May 29th post a team has been working energetically to get the Powerwall working. People from Peck Electric (installation), Green Mountain Power (power grid, cat-herding), Tesla, (the battery), Solar Edge (the inverter), and some outside consultants (different issues) worked with us in person, on the phone, and via email. They tried simulated outages, rewriting the firmware, redoing the fuse box, analyzing connected items, and easily a dozen more approaches I couldn’t follow.
What I was able to do was keep an eye on the setup when none of the specialists were on site, monitoring the cryptic system display board and watching for status changes. I also fired up a Powerwall thread on the Tesla discussion forum, but it seems to have vanished.
So why am I writing about this now?
Because our town just got run over by a serious thunderstorm.
Storms knocked out power all over this part of the state:
And yet I’m typing this, because the Powerwall worked. Every device connected to it is thriving: water pump, refrigerator, several lights, both routers, and more.
How long will it last? We don’t know, but we will find out.
As I write this the device has been working for about 90 minutes without interruption.
EDITED TO ADD: Green Mountain Power restored service around 8 am today. The Powerwall ran throughout, meaning roughly sixteen (16) hours. Which is impressive.
PS: Bonus pick of one determined electrician and the guts of the inverter plus another box: