Charge controllers, such as this Samlex SCC-30AB, are one of the essentials of an RV solar-charging system. They take the 21-plus volts DC produced by the panels and regulate it down to the 10.5-14.6 volts DC, depending on the needs of the battery bank.
Inverter: An inverter allows AC appliances to be used with DC battery power. Transfer Switch: A transfer switch changes the power supply from one source to another. There are two main types to consider when choosing a solar panel for RV battery charging. A roof-mounted panel is permanently affixed to your roof with fasteners or adhesive.
Solar Wiring: You’ll need solar wiring to connect the solar panels to the charge controller. Charge Controller: The charge controller regulates the flow of electricity from the solar panels to the RV battery, preventing overcharging or damage. RV Battery Cables: These cables will connect the charge controller to your RV’s battery bank.
Installing solar panels is possible if your RV is not prepped for them. However, this increases the installation difficulty considerably for roof-mounted panels as you must run wiring through the ceiling and walls. In addition, you must install the components typically found in a solar-prepped RV—charge controller, cable entry plate, inverter, etc.
RV solar panels convert solar energy into direct current electricity (12V DC), which charges the RV’s batteries and stores the electricity. Passing the 12V DC through an inverter converts it into 120-Volt AC (alternating current), which powers 120-Volt gadgets like a coffee maker. In short, with solar panels, you can power almost anything.
RV solar-charging systems run the gamut in pricing. It all depends on need, the quality of the components used, and whether or not the install is professionally done. A basic DIY 150-watt, 10-amp system with a 200Ah AGM battery for a small Class B or Class C motorhome could be done for less than $600.