class 320 csed and solar (pv) panels
We are about to upgrade our electric service to 400 Amps and we plan to install a class 320 CSED (320 Amps continuous, 400 Amps max) ( Square D, Model #: SU3040D400CB ). It has two 200 Amp disconnects, one driving its own 200 Amp buss bar, another one for a remote 200 Amp subpanel.
I have some confusion about how to find the max breaker amps for a solar panel installation. As far as I know, we can install a circuit breaker (CB) for the solar system that is 20% of the service panelÃ¯Â¿Â½s buss rating. Is that the case? If that is the case, how to I calculate the max CB size for solar? We don't want to be limited by 40 Amps when we have 400 Amp service. Is it 40 Amps or 80 Amps in our case?
Should we select a different meter combo? For instance, how about installing a 400 Amp meter + two 200 Amp solar ready subpanels?