Search with Wattson

Notifications

Clear all

Joining the Renewable Heating Hub forums is completely free and only takes a minute. By registering you’ll be able to ask questions, join discussions, follow topics you’re interested in, bookmark useful threads and receive notifications when someone replies. Non-registered members also do not have access to our AI features. When choosing your username, please note that it cannot be changed later, so we recommend avoiding brand or product names. Before registering, please take a moment to read the Forum Rules & Terms of Use so we can keep the community helpful, respectful and informative for everyone. Thanks for joining!

Tesla Powerwall (2) Calibration Cycles

Toodles · 2026-09-28T10:44:17Z

I have recently noticed that my Powerwall 2 has taken to autonomously carrying out a calibration cycle where the battery is charged to 100% and then discharged to my setting of 20%. In itself this is OK (ish) but as during the high usage months I will have the ‘charge from grid’ option switched on, I am concerned that as I have not control over this process, recharging may well occur during peak tariff times! Google via Alexa informs me that I cannot switch this function off and I am concerned as the calibrating cycle may be carried out as frequently as every 30 days and that recharging might well occur at the most expensive times. Has anyone any knowledge or experience with this ‘feature’ please? If I can assume that all recharging would be carried out during the cheapest times of my (Cosy) tariff, then it will just leave the matter of what happens when a ‘flat’ battery coincides with a power cut? Concerned, Toodles.

Page 2 / 2 Prev

Energy Storage

Last Post by Papahuhu 13 minutes ago

14 Posts

4 Users

0 Reactions

111 Views

RSS

Toodles

(@toodles)

Famed Member Contributor

Joined: 4 years ago

Posts: 2978

Topic starter 02/10/2026 10:40 am

@old_scientist Yes, it is the not knowing when the calibration is due that is the problem. When I saw the notice of intent show up, I wondered how I could tell when and how long the process would take. I was able to delay the process by selecting the time, I am at a loss to know how long it might take and when therefore, it would start to recharge. I feel the process needs some refinement to enable users to avoid peak rate recharging cycles! Worried, Toodles.

Toodles, heats his home with cold draughts and cooks food with magnets.

ReplyQuote