A grid tied hybrid system that could be used on an RV!

How does the inverter select the AC source. Can the hybrid inverter draw from both the PV array and shore power at the same time, or is it one or the other? Assuming you're not backfeeding shore power... I don't know what RV park owner would give permission to backfeed, sounds like a liability nightmare?

Thinking more, the inverter must control the backfeed, to prioritize it ... charging batteries is higher priority than selling to the utility I would guess?