[Motor31]

Why do you figure you need a second inverter? Just run the charging wire from the solar into the input side of the inverter and let it charge the battery bank. The solar panels are not going to support any load, they just charge the batteries. Trying to run a second inverter is probably going to put a short circuit into the 120 volt system. If the current inverter is too small then simply upgrade to a larger wattage unit but don't try to run 2 in the same system. Don't forget the inverter needs enough batteries to support the load as well. The power comes from them, not the panels.

If your unit currently has a CONVERTER that is a different situation. Remove that unit and replace it with the inverter. A converter just takes shore power to charge the battery(ies). It doesn't take battery power to run any 120 volt items.