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Tesla Battery Drain

trebor12345 · 2026-07-27T16:44:07Z

My newly installed Tesla Powerwall 3 and Gateway. The battery slowly drains over the day despite there been lots of solar production and minimal draw by the home. Is this normal?

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Energy Storage

Last Post by Toodles 3 weeks ago

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Papahuhu

(@papahuhu)

Reputable Member Member

Joined: 1 year ago

Posts: 390

01/08/2026 2:38 pm

@trebor12345 Figging the software is an apt description. It’s not very reactive to small price differences, it generally needs a helping push. I give mine a shove over the cliff to be sure it works!

This post was modified 3 weeks ago by Papahuhu

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Papahuhu

(@papahuhu)

Reputable Member Member

Joined: 1 year ago

Posts: 390

01/08/2026 2:50 pm

@trebor12345

I always assumed OE asks for a MCS cert for a charger and proof of EV ownership. Id be amazed if the one PW has enough capacity to run your heat pump on a single cheap charge. I cycle mine three times and it’s still not enough for anything less than -2C.

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Toodles

(@toodles)

Famed Member Contributor

Joined: 4 years ago

Posts: 2939

01/08/2026 4:07 pm

@trebor12345 I don’t even have a bicycle! Regards, Toodles.

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

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Toodles

(@toodles)

Famed Member Contributor

Joined: 4 years ago

Posts: 2939

01/08/2026 4:12 pm

@trebor12345 The idea is to ensure that Powerwall knows when it is cheapest to import and most advantageous to export, tweaking the figures by enhancing them is purely to ensure there is no ambiguity or dithering. Tesla have nothing to do with your actual tariff unless you use the ‘smart’ (hah!) features so lying to obtain your required choices is fair game! Rewards, Toodles.

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

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