Small systems, such as those on an RV or boat, should use 12V systems, while larger solar arrays do best with 24V. A good rule of thumb is that if your energy needs are less than 1,000 watts, go for a 12V system. If you use between 1,000 and 3,000 watts, then a 24V system is. . By matching your electricity use (in watt-hours) to your solar panels and batteries, you can camp off-grid confidently — no hookups, no stress. It's simple and straightforward to use. This calculator. . For most RV solar power systems, 12-volt is a good starting point, especially for basic needs and smaller setups. And since this article deals with basic systems for beginners, we'll be referring to 12-volt applications here. 24 or 48 volts can be beneficial for larger RVs or higher power demands. . An outdoor battery cabinet is important for keeping batteries safe. Picking a cabinet with UL 9540. .
