tulegit wrote:
If I take the main input out of the inverter then wouldn't I lose the ability to charge the battery when on gen/shore power?
Not if you give it power from the panel on it's own 15A circuit breaker. That power will then come from the gen/shore and allow the charge portion to charge.
Lets say that you have 1 15A circuit right now that has all stuff you want with inverter power (TV, etc). Disconnect the wire from that breaker and re-route it to the inverter. Then run a section of new wire from that same circuit breaker into the inverter. Re-hook the main AC line to the main breaker, and leave the 12V wires as is. This will fix your A/C issue and any potential microwave or other overuse issue.
I will say that at 20A your batteries will be quite slow to charge compared to the 45-55A converter you unhooked (assuming 45-55).