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Anyone in San Diego have 3+ Powerwalls?

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I’m looking into getting 2 or 3 Powerwalls. Spoke with one installer and they stated going from 2-3 is a big deal with SDG&E as it crosses the line from residential to commercial. One would need another meter behind the regular one to monitor self generation (SGOM?) and require additional things to be code compliant. I have no reason to doubt what they say, but I’ve seen others with 3+ PW’s in various locales and not a mention of this. Is this a SD thing? Is it less of a big deal than it seems? Getting anyone from Tesla to contact me seems impossible but that’s par for Tesla.

9.9 KW solar is already in place.