An RV solar battery charger is a system that charges your RV batteries with solar power. In fact, this refers to practically any RV solar. Depending on the type of RV solar battery charger system you go with, you can achieve several different results. Moreover, your end goal will vary based on your RVing style and power needs and will help determine which system you'll need. Since we now know that RV solar systems are all battery chargers, let's take a look at the different types of batteries that can be used in RV's. All RV solar systems are off-grid RV solar chargers. This means their primary function is to charge a battery. Furthermore, solar battery chargers consist of a minimum of two parts, the solar panels, and a solar charge controller. Solar panels collect power,. There are many advantages to having an RV solar battery charger and taking free energy from the sun. 1. RV solar battery chargers work just about everywhere there is sunlight! 2. They can help to provide power in places where standard electricity isn't readily available. 3.