This also has the circuit breakers you can order for it scroll down
http://www.bestconverter.com/WFCO-8935-ANP-35-Amp-_p_51.html#.XjWS1knsZpwThe WFCO 35 amper is ok for running the rig's 12v while on shore power, but you don't do much of that.
It is unsuitable for charging gel batteries which need particular voltages (see their charging specs!) plus 35 amps is too slow to recharge the bank if on generator.
You will need to get two more gels to make the four- battery bank intended, keeping your batts all the same. You need a better battery charger as others have also said.
You don't mention a generator, but you do need one for off-grid and not enough sun. Even on sunny days you can still need to do a shot of generator high amp charging in the morning and then go on solar for the rest of the day to get the batts as high as possible.
You need to have a generator that has enough watts (VA really) to run the charger's amps, so you have to pick the size of charger in amps to "match" what the portable gen can do.
Four batts can take 100 amps easily but that requires a 3000w gen, so if you are getting a 2200w gen, (today's popular size) look at a 75 amp charger, eg. If you need air conditioning you will need shore power, but perhaps not in the PNW.
Where gels are so fussy about charging voltage, IMO you want an adjustable voltage charger. You can get a deck mount converter and cut the end of a set of jumper cables to make it into a portable charger. Here is one example of a 75 amper with adjustable voltage that will run off a 2200w gen.
https://www.boatandrvaccessories.com/products/powermax-pm3-75lk-75-amp-12-volt-power-supply-with-led-light
