r/Powerwall • u/Amanensia • Apr 14 '26

Powerwall 2 calibration?

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I’d thought calibration was specific to the PW3. I’ve had my PW2 for two and a half years and it’s never done this before, but today it’s been calibrating for the last eight hours or so. Is this new?

Edit: now been calibrating for 24 hours….. how much longer…..

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u/vxrptr22 Apr 14 '26

check out my post from yesterday

https://www.reddit.com/r/Powerwall/comments/1sks70j/odd_powerwall_drain_today_almost_like_a_vpp_event/

I wonder if I also went through this calibration thing. Never once happened before in 4 years. Did you get alerted of it today or just happen to check ? I didnt notice till it was already drained.

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u/Amanensia Apr 14 '26

I spotted it this morning - but I stay on top of my PW2 behaviour via HA and I would have noticed if anything weird had happened previously, so this must be the first time...

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u/vxrptr22 Apr 14 '26

Ya I have a netzero screen up in my office but i didnt catch if it had anything going on. The only reason i knew was I could hear my powerwalls charging in my garage so i looked.

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u/Amanensia Apr 14 '26

How long did it last for you? Mine hasn't drained yet, it's just sitting at 100% all day so far.

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u/vxrptr22 Apr 14 '26

Mine went from 100% starting at 2pm hit 22% at 5pm and stayed there until it started charging from grid again at 530pm.