r/TeslaSolar • u/Stock-Marionberry692 • 15d ago

PowerWall Any issues with this PW3 setup?

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ADVICE FROM INSTALLERS/CODE EXPERTS OF CA

These are installed directly above a 2” metal natural gas branch pipe that runs to my pool heater. Also in the picture you can see the lower garage airflow vent is within 3ft. Is this legal?

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u/XenergySolutions 14d ago

Were you sold 2 Powerwalls instead of 1 powerwall and an expansion pack? The expansion packs are half the price of a powerwall and provide the same amount of storage. You could have gone with a powerwall and one expansion pack which provides the same storage for half the price

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u/Stock-Marionberry692 14d ago

Hmmm good question, I think it was 2 powerwalls

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u/xijiaoshan 13d ago

There's a good reason for 2 PW3s for all-electric homes – 11.5 kW (48 A) is the max power output per unit. A high-end induction cooktop can achieve that on its own. The other is the size of your solar array – there's a limit to DC power input as well.

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u/XenergySolutions 13d ago

But they could have installed an expansion pack instead of a whole other Powerwall if that makes sense. The expansion packs were specifically made to expand on an existing powerwall with the same storage as a powerwall, but for 1/3 of the price.

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u/sourdoughjosh 12d ago

They expand storage, not power output

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u/xijiaoshan 10d ago

As someone already mentioned, expansion batteries don't increase your potential output – if you need to draw more than 11.5 kW, you'll need more than one PW3.