i ran things on MSW for many years, one of those little yellow ones from "pep boys"
i now have a 300w Go Power PSW, but we bought IT for the "dang digital controller" on the electric blanket and mattress pad (one of each don't use them at the same time)
that converter..read the specs closely if its original its 20amps for the house 12v circuits when plugged in to 120v and only 3~6amps trickle charge for the battery, which is okay if you only go camping for the week end and leave it plugged in all week at home to recharge
100w Solar , about 6-7amps charge, is okay for week end use , it will help off set, the use of lights etc.. so the batteries don't go dead
but if your going to take any vacation time, dry camping you need some kind of heavy duty aux charging, a generator under the picnic table will charge your batteries even when its raining
you can add another charger any where between the converter and the batteries
just connect the 12v wires together, like connecting extra batteries or the clamp solar you have,
i would want at least 25amp charger..and more is better, look around for a 25amp vector from black & decker
if all you want is lights and water pump, NO TV. or electronics, you can forget the extra charger and the inverter,
but to run stuff from the inverter you need to be able to recharge the batteries
solar doesn't always shine enough to do the job
