5 Common RV Electrical Problems and How to Fix Them

From tripping breakers to dead batteries, here's what actually goes wrong and what you can do about it.

By Scott Marlins | | Last updated: March 2026

TL;DR

The five most common RV electrical problems are shore power connection failures, tripping breakers from overloaded circuits, batteries that won't hold a charge, converters that stop charging, and GFCI outlets that keep tripping. Most are preventable with basic maintenance. Electrical diagnostics cost $95 to $150. Simple fixes like outlet replacement run $75 to $150, while larger jobs like converter replacement range from $300 to $800. Never DIY anything involving your main panel, transfer switch, or shore power connection.

RV electrical systems are a strange mix of residential wiring, automotive wiring, and components you won't find in either. Your rig runs on both 120-volt AC (like your house) and 12-volt DC (like your car), and the two systems interact in ways that confuse even experienced homeowners.

After 10 years of mobile RV repair across Jensen Beach and the Treasure Coast, electrical issues are the second most common reason people call us (right behind AC problems). The good news is that about half of these calls involve problems you can prevent or even fix yourself. The other half? Those you'll want a professional handling, because RV electrical mistakes can cause fires.

Here are the five problems we see most often, what causes them, and honest advice on what to do about each one.

Problem #1: Shore Power Won't Work

You pull into a campground, plug into the pedestal, and nothing happens. No lights, no AC, no power at all. Or maybe it worked last night but this morning everything is dead. This is the single most common electrical call we get.

Here's the thing about campground power pedestals: they're often old, weathered, and overtaxed. According to data from the National Fire Protection Association, faulty shore power connections are involved in roughly 28% of RV electrical fires. That's a number worth paying attention to.

Common causes and fixes:

Quick test: plug into a different pedestal or a different campground. If your RV works fine somewhere else, the original pedestal was the problem. If it doesn't work anywhere, the issue is on your side.

Problem #2: Breakers Keep Tripping

You're running the AC, someone turns on the microwave, and everything goes dark. Sound familiar? Breaker tripping is usually about math, not a malfunction.

A 30-amp RV service provides about 3,600 watts total. Here's what common RV appliances draw:

Do the math. AC plus microwave on a 30-amp connection? That's 2,500 to 3,500 watts. You're right at the limit, and any additional draw (a phone charger, the refrigerator compressor kicking on) pushes you over. The breaker does its job and trips.

When tripping breakers signal a real problem:

These signs point to a worn breaker, a failing appliance drawing excess current, or a wiring problem. Don't just keep resetting the breaker and hoping for the best. Repeated tripping with heat or smell is a fire risk. Have you checked whether the breaker itself is warm after it trips? That's a quick indicator of whether the breaker is the problem versus the circuit being overloaded.

RV shore power connection and electrical panel being inspected

Problem #3: Batteries Won't Hold a Charge

Your house batteries are supposed to power your 12-volt systems (lights, water pump, slides, furnace fan) when you're not connected to shore power. When they can't hold a charge, you're stuck.

Here's a statistic that surprises most people: about 85% of lead-acid RV batteries fail prematurely due to sulfation, which happens when the battery sits in a partially discharged state. In other words, most battery "failures" are actually maintenance failures.

Why your batteries might be dying:

Battery maintenance tips:

Problem #4: Converter Isn't Working

The converter is the box that converts 120-volt AC shore power into 12-volt DC power to run your lights, water pump, and other DC appliances while also charging your batteries. When it fails, your batteries drain even while plugged in, and your 12-volt systems stop working once the batteries are empty.

Converter problems are sneaky because they often happen gradually. You might not notice until your batteries are dead and the lights are dim.

Signs your converter is failing:

Common converter issues:

A simple test: with the RV plugged into shore power, use a multimeter to measure the voltage at the battery terminals. You should see 13.5 to 14.5 volts if the converter is charging properly. If you see 12.6 volts or less, the converter isn't doing its job.

Problem #5: GFCI Outlets Keep Tripping

GFCI (Ground Fault Circuit Interrupter) outlets are the ones with the "Test" and "Reset" buttons, usually found in your kitchen, bathroom, and exterior outlet locations. They're designed to protect you from electrical shock by cutting power when they detect a ground fault (current flowing somewhere it shouldn't).

When GFCIs trip constantly, it's annoying. But it's also usually telling you something important.

Why GFCI outlets trip:

The fix: Start by pressing the Reset button firmly. If it won't stay reset, unplug everything on that circuit and try again. If it still trips with nothing plugged in, the GFCI itself or the wiring is the problem. GFCI outlets cost $15 to $25 for the part and about $75 to $150 for professional installation.

Important safety note: never bypass a GFCI by replacing it with a standard outlet. That's a code violation and a genuine shock hazard, especially in wet areas like bathrooms and exterior locations. Is the GFCI in your RV bathroom original equipment? If so, it might be time for a replacement.

When to Call a Professional

Here's my honest breakdown of what you can handle and what you shouldn't touch:

Safe for DIY:

Call a technician:

Electrical work isn't like plumbing, where a mistake means a water leak. Electrical mistakes cause fires. According to the NFPA, RV fires cause an average of $44 million in property damage annually in the United States. About 30% of those fires are electrical in origin. Those aren't numbers to take casually.

If you're dealing with any of these electrical issues and you're in the Jensen Beach, Stuart, or Palm City area, give us a call at 772-356-0328. We'll come to your location, diagnose the problem, and give you a written estimate before any work starts.

Frequently Asked Questions

The most common cause is running too many appliances on the same circuit. An RV on a 30-amp connection can only handle about 3,600 watts total. Running the AC (which draws about 13 to 16 amps by itself) plus a microwave or hair dryer will trip the breaker every time. Other causes include a failing appliance drawing excess current, worn breakers, or wiring issues.

Standard lead-acid RV batteries last 3 to 5 years with proper care. Lithium batteries can last 8 to 10 years. The biggest factor is how deeply you discharge them. Regularly draining lead-acid batteries below 50% cuts their lifespan roughly in half. Heat also plays a role, and Florida's climate is harder on batteries than cooler states.

A 30-amp connection provides one 120-volt hot leg at 30 amps, giving you about 3,600 watts total. A 50-amp connection provides two 120-volt hot legs at 50 amps each, giving you about 12,000 watts total. Most travel trailers use 30-amp. Larger motorhomes and fifth wheels use 50-amp. You can use an adapter to plug a 30-amp RV into a 50-amp pedestal, but you're still limited to 3,600 watts.

Common causes include a blown fuse on the converter's DC output, failed diodes inside the converter, corroded battery connections, or a converter that's simply worn out. If your converter is over 10 years old, internal component failure is likely. A technician can test the converter's output with a multimeter in about 15 minutes.

No. Most RVs have a transfer switch that automatically prevents both power sources from feeding the system simultaneously. If your transfer switch is faulty or bypassed, connecting both can backfeed power and create serious fire or electrocution hazards. Never bypass a transfer switch. If it's not working properly, have it repaired by a qualified technician.

Basic diagnostics run $95 to $150. Common repairs include: GFCI outlet replacement ($75 to $150), breaker replacement ($100 to $200), converter repair or replacement ($300 to $800), transfer switch replacement ($400 to $900), and full electrical panel rewiring ($1,200 to $3,000). We provide written estimates before starting any work.

Electrical issues with your RV?

Call for a free estimate. Same-day service available across Jensen Beach and Martin County.

772-356-0328