As long as the solar output is less then the inverter input, the wires will only ever see less current then there is now. I plan on putting solar on my trailer, and attaching it to the inverter/chargers DC terminals - 4/0 cables to the agm bank.
I have 3 existing converters (100,85,55 amp) already attached there. I run the 100 amp in double conversion off a 20 amp circuit, the 85 off a 15, and the 55 is on my Costco 2000 watt inverter generator. I normally run the IC's 150 amp charger. Dry camping I run the 150+100 off the genset until the IC amps drop below 100, then I shut down the 100.. My inverter is rated 3000 watts running, so a 250 amp charge (peak) is less then the 300 amp rated and 600 amp peak load.
