RV Electrical Systems can be complex 

They iinvolving both 12-volt DC (Direct Current) and 120-volt AC (Alternating Current) power. Understanding how these systems work and common issues can help with troubleshooting and determining when to seek professional help.

 

Common Issues 12-Volt DC System (Battery Power)?

• Dead/Low Batteries: The most common issue. Can be caused by parasitic drains, old batteries, or a charging system failure. Symptoms include dimming lights, slow fans, and appliances not working.
• Blown Fuses: Each 12V circuit is protected by a fuse. A blown fuse means a short circuit or an overloaded circuit.
• Loose/Corroded Connections: Battery terminals, ground wires, and appliance connections can corrode or loosen due to vibration, interrupting power flow.
• Faulty Converter: The converter changes 120V AC to 12V DC and charges your batteries. If it fails, your 12V system might not work when plugged in, and your batteries won't charge. Symptoms include no 12V power when plugged in, or batteries not charging.

Common Issues 120-Volt AC System?

• Tripped Circuit Breakers: Both at the campground pedestal and inside your RV's electrical panel. Can be caused by overloading a circuit (running too many high-draw appliances at once), short circuits, or ground faults.
• Faulty Shore Power Cord: Damaged insulation, loose plugs, or internal wire breaks can prevent power flow.
• GFCI Outlets Tripped: Ground Fault Circuit Interrupter outlets are safety devices found in wet areas (kitchen, bathroom, exterior). If a ground fault is detected, they trip to prevent shock. If one GFCI trips, it can cut power to other outlets downstream.
• Transfer Switch Problems (Motorhomes): This device automatically switches between shore power and generator power. If it malfunctions, you might not get power from one or both sources.
• Inverter Failure: If your inverter isn't working, your 120V outlets won't function when you're off-grid, even if your batteries are charged.