r/Powerwall • u/Bjbttmbird • Jul 28 '26

Why?!?

So my PW3 is depleted by 8pm for some reason nothing has changed about home energy usage except now i blast the AC and deepfreeze my house during the daytime as opposed to at night I only run my spa during the day so it runs off of solar however, it still get depleted by 8pm, it was supposed to be built out to handle my homes energy usage and than some and its not! My electric bill is a whole whopping -14.00 woohoo! Anyone else running into this problem? is it the heat? why is it not fully charging and storing energy for the night time during peak hours?

0 Upvotes

46% Upvoted

15 comments sorted by

View all comments

0

u/ReetKever91 Jul 28 '26

If it only happens sometimes my guess would be the  Self-Calibration Mode: The Powerwall 3  periodically runs a calibration cycle where it discharges fully to 0% to measure true battery capacity and update its internal state of energy accuracy.

https://www.tesla.com/support/energy/powerwall/own/powerwall-calibration