When applying for NEM, it is necessary to get approval for the output kW of the PV system. This is typically based on previous usage, and the old rule was to not exceed 110% of the previous. One can also ask for additional capacity based on expectation of higher usage. (E.g, for our house, we asked for 8.16kW which projected to 260% of historical usage, but I claimed that we would install a heat pump and so needed the extra capacity. This was approved.)
For houses without a history, one was able to use the square footage time 3.32. That has been reduced to 3 watts/sq. ft.
https://www.pge.com/snemapply/nemLanding/build?execution=e1s1
For houses without a history, one was able to use the square footage time 3.32. That has been reduced to 3 watts/sq. ft.
https://www.pge.com/snemapply/nemLanding/build?execution=e1s1