RV Electrical Repair in Guntersville, Alabama
Dead outlets, flickering lights, batteries that won't charge, or a converter that quit — RV electrical problems range from simple to serious. We diagnose the full system and fix what's actually wrong.
RV Electrical Isn't One System — It's Three
Most RV owners don't realize their RV has two completely separate electrical systems — the 12V DC system that runs off the batteries and the 120V AC system that requires shore power or a generator. A converter ties them together. Solar adds a third layer. A problem in one system doesn't always affect the others, but diagnosing which system is the source of the problem is where most electrical troubleshooting goes wrong.
We test each system individually and trace faults methodically — voltage at the battery, output at the converter, continuity through the wiring, load on each circuit. That's how electrical problems get solved permanently instead of temporarily.
If your RV has electrical issues that no one has been able to find and fix, that's the kind of work we do every week.
The Two Electrical Systems in Your RV
12V DC System — Battery Power
Powers your RV even when you're not plugged in. Runs off the house battery bank and feeds lights, fans, water pump, furnace blower, slideout motors, leveling jacks, and most built-in appliances. This system works at the campsite, in storage, and on the road.
Common failures: Blown fuses, corroded connections, failed batteries, parasitic draw draining the bank, bad ground connections causing intermittent failures.
Key components: House battery bank, 12V fuse panel, wiring harness, ground bus, and all 12V loads.
120V AC System — Shore Power
Same voltage as your home. Powers outlets, air conditioner, microwave, electric water heater, and other high-draw appliances. Requires a connection to shore power at a campsite or a running generator. Does not work off the batteries alone without an inverter.
Common failures: Tripped GFCI outlets, tripped breakers, failed shore power inlet, bad transfer switch, failed converter not charging batteries.
Key components: Shore power cord and inlet, transfer switch, main breaker panel, GFCI outlets, and the converter/charger.
RV Electrical Problems We Diagnose and Repair
These are the electrical failures we see most often. Each one has a specific diagnostic path — and a fix that lasts.
Dead outlets — some or all
The first step is always the GFCI outlets — one tripped GFCI can kill multiple outlets downstream. If GFCIs are fine, check the breaker panel. If breakers are fine, there's an open circuit between the breaker and the outlet. We trace the wiring to find the break, whether it's a bad connection, a pinched wire behind a cabinet, or a failed outlet.
Batteries drain overnight
Something is pulling power from the battery bank even when nothing appears to be on. This is called a parasitic draw. Common culprits include a faulty LP gas detector that never shuts off, a slide motor controller staying active, a light left on in a compartment, or a failed component drawing current continuously. We measure the draw with everything off and isolate which circuit is responsible.
Batteries won't charge from shore power
The converter is the device that charges your 12V batteries from 120V shore power. A failed converter means the batteries drain as you use 12V systems and never recover. We test converter output voltage — it should read 13.5 to 14.4 volts when charging. If it's putting out 12V or nothing, the converter has failed and needs replacement.
Flickering or intermittent lights
Flickering 12V lights are almost always a connection problem — a loose ground, a corroded terminal, or a wire that's vibrated loose over miles of travel. The challenge is that intermittent problems are hard to reproduce on command. We check the battery terminals, the ground bus, and connections at the affected fixtures to find the loose point.
No power from shore hookup
If the generator works but shore power doesn't, the problem is in the shore power path — the inlet connector, the power cord, the transfer switch, or the main breaker. We test each point in sequence to find where the voltage stops. A failed transfer switch is a common cause that gets misdiagnosed as a campground power problem.
Circuit breaker keeps tripping
A breaker that trips repeatedly is protecting the circuit from too much current draw. The cause could be too many appliances on one circuit, a failing appliance drawing excess power, or a short circuit in the wiring. We measure the actual load on the circuit and test each appliance to find what's exceeding the breaker's rating — and whether it's a usage issue or a wiring fault.
Converter vs. Inverter — What's the Difference?
This is one of the most common points of confusion in RV electrical. Both devices bridge your two electrical systems, but in opposite directions.
Converter
Takes 120V AC shore power and converts it to 12V DC to charge your house batteries and power your 12V systems. Almost every RV has one. When your converter fails, your batteries don't charge while plugged in and your 12V systems run entirely off the battery bank until it's depleted.
Symptom of failure: Batteries drain even when plugged into shore power. Converter output should read 13.5–14.4V. If it reads 12V or less, it's failed.
Inverter
Takes 12V DC battery power and converts it to 120V AC — letting you run AC-powered devices without shore power or a generator. Not all RVs have inverters. They're common on units designed for off-grid use. An inverter does not charge batteries; it drains them.
Symptom of failure: 120V outlets don't work when off-grid even with charged batteries. Inverter output should read 110–120V AC under load.
Some modern RVs have a combined converter/inverter unit. We test both functions independently to determine exactly which is failing.
Why RV Owners Trust Us With Their Electrical
National Champion of RV Techs®
Our founder is the 2-time RVIA Top Tech and co-creator of the RVTI certification program. Electrical diagnosis is one of the skills that separates a trained technician from a parts swapper.
Methodical Diagnosis
We test voltage, amperage, continuity, and resistance at each point in the circuit. Electrical problems get solved permanently when you find the actual fault — not when you replace components and hope the problem goes away.
Parts in Stock
We stock common converters, fuses, breakers, GFCI outlets, and wiring components. Many electrical repairs are completed the same visit without waiting on parts.
RV Electrical Questions We Hear Every Day
RV outlets run on the 120V AC system fed by shore power or a generator. Dead outlets are most often caused by a tripped GFCI outlet that needs to be reset — check every GFCI outlet in the RV, including ones in other rooms, because a single GFCI protects multiple outlets downstream. If no GFCI is tripped, the next step is the circuit breaker panel. If breakers are fine and the outlet still has no power, there is a wiring problem between the breaker and the outlet that requires tracing the circuit.
Batteries that drain quickly or won't charge fully are usually caused by one of three things: the batteries themselves have failed and can no longer hold a charge, the converter that charges the batteries from shore power has failed, or there is a parasitic draw — something is pulling power from the batteries even when the RV is off. We test each battery individually, check the converter output voltage, and measure the parasitic draw to find the actual cause before recommending a replacement.
RVs have two separate electrical systems. The 12V DC system runs off the house batteries and powers lights, fans, water pump, furnace blower, slide motors, and most built-in appliances. It works whether you are plugged in or not. The 120V AC system is the same voltage as your home and powers outlets, the air conditioner, microwave, and other high-draw appliances. It requires shore power or a generator. The converter connects the two systems — it charges your 12V batteries from 120V shore power. Problems in one system don't always affect the other, which is why correct diagnosis matters.
If the generator works but shore power doesn't, the problem is in the shore power connection path — the shore power cord, the power inlet on the RV, the transfer switch, or the main breaker. The transfer switch automatically routes power between shore and generator; if it fails, one source stops working. We test the full shore power path from the inlet to the breaker panel to find where the problem is.
Basic tasks like replacing a 12V fuse or resetting a GFCI are straightforward and safe for most owners. Anything involving the 120V system, the shore power connection, the converter, or the battery charging system carries real risk of shock, fire, or permanent damage to components if done incorrectly. RV wiring is more compact and less forgiving than residential wiring. If you are not certain of what you are doing, the cost of having it done correctly is far less than the cost of a wiring fire or a failed inverter. We are happy to talk through what you are seeing before you start, at no charge.
RV Electrical Repair Near You in North Alabama
Our shop is at 3619 AL-69 in Guntersville, Alabama. RV owners bring their electrical problems to us from across North Alabama — often after other shops couldn't find the fault.
Serving Guntersville, Albertville, Boaz, Arab, Scottsboro, Fort Payne, Cullman, Attalla, Gadsden, Oneonta, Decatur, Huntsville, Grant, New Hope, Owens Cross Roads, Hampton Cove, Madison, and Athens.
Describe What the Electrical Is Doing
Which lights, which outlets, which system — the more detail you give us, the faster we can tell you what's likely wrong before you drive in.