I have three PowerWalls, a Gateway, and ~8 kw solar installed by Tesla in late 2020. The PowerWalls were at about 52%. I momentarily lost power and all the lights went out! Twice. First time was about a quarter second, the second time more than a second, and a brief flicker too. This used to happen a few times per year before I got my PowerWalls. Now, I am used to the PowerWalls kicking in when we lose power, and possibly seeing a ~1/60 second flicker, but not this time. The app shows three events (duration "a few seconds") in Backup History, but no errors.
Tesla looked at the logs and said "the grid was out of compliance" so the gateway couldn't switch to the PowerWalls. Pressing for more information, she said "the grid impedance was too high, 0.6 ohms, and it needed to be below 0.27 ohms". Basically, my whole-house backup that is supposed to take over when I lose power, can't, and Tesla is pointing their finger at the grid, saying the "grid was out of compliance" multiple times. I was told to contact my electric utility to resolve this. She said this is not very unusual, and happens a lot. Has anyone ever heard of this? And how do you resolve this so the lights and fridge stay on at the next power failure? (I'm expecting my utility, PG&E, to tell me to contact Tesla, and I don't want to be stuck in the middle).
Tesla looked at the logs and said "the grid was out of compliance" so the gateway couldn't switch to the PowerWalls. Pressing for more information, she said "the grid impedance was too high, 0.6 ohms, and it needed to be below 0.27 ohms". Basically, my whole-house backup that is supposed to take over when I lose power, can't, and Tesla is pointing their finger at the grid, saying the "grid was out of compliance" multiple times. I was told to contact my electric utility to resolve this. She said this is not very unusual, and happens a lot. Has anyone ever heard of this? And how do you resolve this so the lights and fridge stay on at the next power failure? (I'm expecting my utility, PG&E, to tell me to contact Tesla, and I don't want to be stuck in the middle).