Quick Answer
Yes, there are specific regulations for installing solar on RVs, primarily related to electrical safety and fire hazards, set by the National Fire Protection Association (NFPA) and the International Code Council (ICC).
Electrical Safety Considerations
When installing solar on an RV, ensure that the electrical system meets the National Fire Protection Association (NFPA) 1192 standard for Recreational Vehicles. This includes proper sizing of the battery bank, charging system, and inverter to prevent overcharging, overheating, and electrical fires. Install a dedicated 12-volt DC distribution panel to isolate the solar system from the RV’s 120-volt AC system.
Panel Mounting and Roof Load
Mount solar panels on the RV’s roof, but ensure they are securely fastened to the roof structure to withstand wind loads and heavy snow. Use a load calculator to determine the maximum roof load, which varies by RV type and size. For example, a typical RV roof can support up to 30 pounds per square foot (psf) of roof load, but this may be reduced to 20 psf when including solar panels.
Shore Power Integration and Inverter Selection
Integrate shore power into the RV’s electrical system using a transfer switch or a smart inverter/charger to automatically switch between solar power and shore power. Select an inverter that meets the RV’s power needs and is compatible with the solar panel system. For example, a 2000-watt inverter can power most RV appliances, but a 3000-watt inverter may be necessary for larger RVs or those with high-power appliances.
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