Current solar buyers who improve their system size by 10% or 1kW, whichever is much more, might be compelled on to NEM3. Other solar electric powered producing systems refers to all solar electric powered building systems except flat-plate, non-concentrating photovoltaic modules. CEC updates this listing sometimes, and only every time https://californiasolarcompany.blogspot.com/2025/02/diy-vs-california-solar-services-which.html