I recently traveled to Julian, California to install a complete solar system on a 38' Montana 5th wheel RV trailer. The system includes 3 Overlander-170 watt solar panels, four new East Penn Deka batteries, and a GP-IC-3000 Inverter / Charger. The 3000 watt inverter is wired in pass through mode so every time the shore power or generator is used the GP-IC-3000 Inverter / Charger will quick charge the batteries with the built-in 125 amp battery charger. With four batteries, every appliance in the RV can be operated except for the air conditioner. The generator or shore power is required to operate the air conditioner. The customers are leaving soon for a 18 month road trip.
Today I installed two 160 watt solar panels and a PWM charge controller on a 2014 Thor Miramar 34.2 Class A motorhome. The best part of this job was the excellent surf rolling in. The San Elijo State Beach Campground is near Cardiff by the Sea and many of the spots are on a bluff overlooking the Pacific Ocean. You can run your generator but only during the day. There is no power at these sites so having a solar system to keep the batteries charged is the only way to go.