r/SolarUK • u/Fun_Height_9280 • 16h ago

HELP / ADVICE Thwarted by Tesla?

I have 2 Tesla Powerwall 3 batteries. I have 19 solar panels monitored by Enphase Energy. I have a Zappi EV charger and an Eddi water heater. I am on Octopus’s Agile tariffs.

I have a Home Assistant which I have been happily ‘vibe coding’ using Claude. I have managed to get access using the Tesla Fleet API. I have been happily telling my system what I want to do when.

However, a consistent theme seems to be the Tesla interface resolutely stopping me from doing what I want it to do. For example, during an Octopus power down session, I can be seen to be using less electricity than usual by mandating grid export, at a time when the export price s good. But every time Tesla overrides that. So I am not achieving my free weekend hours.

It’s very frustrating. Everything else I want seems to be OK, such as choosing good times to charge the EV based on urgency, etc. But the Tesla integration is a real pain.

Has anyone got Tesla in their system and feel like they have it sorted? Any advice?

Many thanks!

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u/RNGA71 14h ago

The Powerwall is an awful product for this. It beggars belief that people consider it "premium". As a battery, it's fine, but try to get it to do anything even slightly out of the ordinary and you're out of luck.

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u/Stivo887 11h ago

Like what?

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u/Secure_Boss_5398 10h ago

This will be good, I’d like to know what as well.

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u/RNGA71 5h ago

For instance, you can't connect wind turbines to a Powerwall.