ai4px
Wes
~7600 is kind of a magic number in the residential PV world. Like most people you probably have a 200A main panel. Most PV systems are connected in this panel. The max back-fed breaker in a 200A panel is 40A to prevent overloading the bus. The max sustained current for 40A is 32A or ~7600w.
I'm not sure this about max back feed. In our case we have a generator transfer switch and ended up double lugging the electrical meter, so none of the 16.5kw of solar goes through the house 200amp panel. Oh the other hand, the two solar inverters both back feed through a 100 amp sub panel right off the meterbase and one of them is 12kw, and it most certainly back feeds greater than 40amps.
The only oddity I ever heard of for a backfed breaker was that it had to be screwed in.