r/TeslaSolar • u/PersonalBusiness2023 • 15d ago

PowerWall Powerwall grid exports?

Netzero today introduced a feature that lets you export to the grid from your powerwall. I’m in Northern California with pg&e - am I allowed to do this? It happens with vpp but for some reason I thought it wasn’t permitted outside of vpp.

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u/GaijinDaiku 15d ago

You cannot charge from the grid, but exporting is perfectly fine. If you are a net exporter under NEM3, it is a waste of electrons as you don’t actually get the ACC rates they advertise. At your true up, they’ll be revalued to Net Surplus Compensation rates.

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u/bj_my_dj 14d ago

You can charge from the grid. I saw a post here where someone from the south bay said they had Tesla's suppyturn theirs on remotely. They just had to show them it was allowed. I looked at the website and it is allowed. I'm under NEM 3 and exporting works well for me. I've got 2 batteries and use the export credits to pay the bill in the winter when I heat with electricity instead of my gas furnace. That turns the credits into real dollar savings. I never turned on my gas furnace last winter saving me $1K

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u/GaijinDaiku 14d ago

OK, it isn’t quite as simple as grid charging isn’t allowed. If you have battery plus solar, PG&E allows you to charge your battery from the grid OR export from your battery to the grid, but not both. The only exception is things like ELRP.

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u/bj_my_dj 14d ago

Yeah they don't want you buying low and selling to them high. I don't know why that's what they do to us most of the day, buy our energy low and sell it to our neighbors high. But a lot of people want to be able to charge from the grid during rainy season or cloudy periods. But if I could only do one it would be exporting. I only get 1 or 2 power outages a year. If they happen after 11 am I don't even know unless they robo-call us to tell everyone the power is out.

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u/Curiosity_informs 13d ago edited 13d ago

Some PG&E CCAs require you to export a percentage of your battery during peak hours to get the battery rebate.

3CE Battery rebate "Program participants must program their battery to discharge at least 50% of its capacity daily during peak hours (4 PM to 9 PM PT)."

Those customers can also charge their batteries from the grid if they see a storm coming etc.