Backfeeding isn't really a problem practically unless you're (dangerously) hacking a system together yourself without knowing what you're doing. Any inverter/ch

Backfeeding isn't really a problem practically unless you're (dangerously) hacking a system together yourself without knowing what you're doing. Any inverter/charger designed to work in this kind of system either has a transfer switch built in, or interfaces to an external one that stops backfeeding when the grid is down.