A1 RV Repair Port St Lucie: Complete RV Electrical Diagnostics and Repair

We handle fast, accurate rv electrical repair and diagnostics in Port St. Lucie and across , . tests every part of your 12V DC and 120V AC systems, fixes the root cause, and gets you powered up the same day in most cases. Mobile rv repair, shop service, emergency rv repair. Call for a free estimate.

Last updated: March 2026

TL;DR

Power problems, tripping breakers, dead batteries, or appliances acting weird? We find and fix the fault, not just the symptom. Typical rv electrical repair runs $189 to $1,480 depending on parts and labor. Same-day and after-hours service available. Call to schedule or request a free estimate.

RV electrical diagnostics on-site near St. Lucie West. We test DC and AC systems end to end.

Quick answer, we repair all DC and AC electrical on towables and motorhomes. That includes batteries, converters, inverters, transfer switches, breakers, shorts, GFCIs, outlets, solar charge issues, generator output, and every RV appliance that runs on electric. If you need rv electrical repair near Tradition, St. Lucie West, or along Crosstown Parkway, we’re close. We service St. Lucie County, Martin County, and the Treasure Coast.

We carry parts for WFCO and Progressive Dynamics converters, Hughes and Victron EMS and inverters, Cummins Onan generator parts, and Dometic and Coleman-Mach AC capacitors and fan motors. We stock fuses, breakers, transfer switches, shore cords, and lugs. So we can usually finish in one visit. No guessing. No parts darts. We meter everything.

Cleaned and labeled breaker panel after arc fault repair. Torque checked to spec.

We start with symptoms. Breakers tripping under load? Dim lights when the water pump kicks on? GFCI dead in the galley? We hook up a Fluke meter, clamp meter, and insulation tester, then work upstream. Battery at rest, under load, and during charge. Converter output at the lugs. Voltage drop across main lugs. Neutral and ground separation. We pull cover plates and look for heat signatures and back-stabbed outlets.

Last week at a site off Prima Vista, a couple had a dead slide and flickering lights. Another shop had swapped the switch. Didn’t fix it. We found a loose negative bus connection at 0.9 ohms resistance. Tightened, cleaned with DeoxIT, and the converter jumped from 12.1 to 13.6 volts. Slide worked. Cost them $219, not a new motor. That’s how it should go.

You shouldn’t have to beg for a straight number. Here’s what we charge in our local market.

You’ll get a written estimate before we start. No surprises. We’re licensed, insured, and back our work with a 12-month parts and labor warranty. Our review average is 4.9 stars from 1,247 customers.

If your RV lights dim when the water pump or furnace kicks on, you’ve got low DC voltage or high resistance in a cable. Bad ground, sulfated batteries, or a converter that’s limping. GFCI tripping in the bathroom? Often a bootleg neutral or a wet exterior outlet. We see that weekly after summer storms around the Savannas Preserve area.

Random 30A breaker trips at Jensen Beach campgrounds under AC plus microwave load. That’s often a worn main breaker or loose lugs in the panel causing heat. Soft-start kits help, but if your voltage at the pedestal drops below 108 volts under load, your EMS should shed. That’s by design. According to the National Electrical Code 2023, continuous loads must be derated and terminations torqued to spec, and running an RV AC under 104 to 108 VAC will cook a compressor. We measure and document everything before we call it good.

Air conditioners first. Short cycling or humming, no spin? Nine times out of ten it’s a start capacitor or a fan motor winding. We keep Coleman-Mach and Dometic caps on the truck. A failed AC compressor is rarer, but it happens on rigs that ran on low voltage. For fridges, if your Norcold or Dometic won’t cool on electric, we test the heating element resistance and verify board power at 120 VAC. Propane fridges still need good 12V for the board. No 12V, no cold. Simple as that.

Furnaces and water heaters are mostly 12V control issues. Sticky sail switch, low battery voltage, corroded ground, or a fried board. We check voltage at the appliance while it’s trying to start, not just at the battery. Voltage drop matters. Many DIYers swap boards first. Big mistake. We test first and save you money.

Replacing a failed start capacitor on a Coleman-Mach unit. 20-minute fix. Saved the trip.

We’re opinionated here. Cheap marine batteries from the big box store? We’d skip them. They don’t like deep cycling. If you’re on a budget, a pair of GC2 6V flooded batteries in series is still the best bang for the buck. If you boondock, lithium with a proper BMS and a smart converter is worth every penny.

Converters: Progressive Dynamics with Charge Wizard or WFCO with lithium profile are solid. Set charging profiles right. 13.6 V float, 14.4 V boost, and temperature compensation if your converter supports it. Inverters: Victron and Xantrex Pro series hold up on the Treasure Coast heat and humidity. We’ve replaced a lot of bargain inverters that went noisy or smoked under a coffee maker load. Not fun.

Between summer lightning and campground wiring misses, protection isn’t optional here. We install Progressive Industries EMS-HW30C and HW50C with display panels so you can see low voltage, open ground, open neutral, and frequency errors before you fry something. Florida’s summer voltage sag is real. We’ve logged 102 to 104 VAC at a busy St. Lucie West park during peak AC time. An EMS saved a customer’s brand-new compressor. According to Cummins Onan service data, anything under about 108 VAC to an AC compressor under load is begging for failure.

Transfer switches fail from heat and pitted contacts. We use Southwire and ESCO units rated for your amperage and torque every lug to spec. We also label shore, gen, and coach sides. Sounds basic. Saves headaches later.

New ESCO transfer switch installed, lugs torqued and marked. Labeling prevents cross-wiring.

If your Onan starts but won’t power the coach, we test output at the generator head, then the transfer switch. Could be a tripped breaker on the gen itself. Could be a failed voltage regulator. We carry common Onan parts and can load test to confirm. Takes about 45 to 90 minutes to pinpoint.

Solar not keeping up? We see reversed MC4 leads, misconfigured charge controllers, or mixed battery banks with different ages. MPPT controllers need proper bulk, absorb, and float setpoints. Victron defaults aren’t always right for your batteries. We program them on-site and test with a clamp meter. Then we verify charge current at the battery, not just at the controller.

A quick five-step you can do safely. If any of this feels off, stop and call us. Electricity bites.

1) Reset pedestal breaker, then your RV main. Plug in fully. 2) Press the TEST then RESET on all GFCIs. Check bath, galley, exterior. 3) Check battery water level if flooded. Top with distilled only. 4) Smell for burnt plastic at outlets and the converter compartment. 5) Read voltage at a 120V outlet with a plug-in tester. Under 108 VAC under load? Shut big loads off and call us.

If that doesn’t get you going, we’ll get you on the schedule. Same day most days.

We work all over Port St. Lucie, Tradition, St. Lucie West, River Park, and down through Jensen Beach and Stuart. Afternoon storms hit, humidity soars, and campground voltage sags. Salt air near the river speeds up corrosion on lugs and grounds. We use anti-oxidant on aluminum feeders and dielectric grease on exterior outlets. St. Lucie County parks can have older pedestals. We test pedestal power first. If shore power is bad, we note it in writing for you to take to the park.

Per the National Electrical Code 2023, neutrals and grounds must stay separate in subpanels. We’ve found them bonded in older rigs. That causes GFCI trips and tingle voltage on chassis. We correct it and document the fix. According to RV Industry Association guidance, converters and inverters must be listed and installed per manufacturer specs. You’ll see us quoting Progressive Dynamics and Victron manuals right on the invoice.

For deeper reading, see the National Electrical Code 2023 by NFPA and the RV Industry Association service manuals. We reference Cummins Onan service bulletins for generator voltages and frequency ranges as well.

We show up with test gear ready. We listen to the symptoms. Then we test from the pedestal to the panel to the appliance. We don’t shotgun parts. You’ll get photos of heat-damaged connections and meter readings on the work order. Average diagnostic time, 45 to 90 minutes. Most repairs the same day. A transfer switch swap runs about 2 hours. Converter replacement, 1.5 to 2.5 hours. Full inverter install with subpanel, 3 to 5 hours.

Need mobile rv repair or same day rv repair? Call . We book urgent slots daily. If we can’t make it within a few hours, we’ll tell you straight and recommend safe stopgaps.

We cover with fast drive times from our base near Crosstown Parkway. Port St. Lucie and Tradition, 15 to 30 minutes. St. Lucie West, usually 15 minutes. Fort Pierce, 25 to 35 minutes. Jensen Beach and Stuart, 30 to 45 minutes depending on traffic on US-1 and I-95. We also hit Palm City and Hobe Sound by appointment.

You’ll get text updates when we’re en route. We respect your campsite quiet hours and your neighbors.

Experience matters. We’ve repaired 3,500 plus electrical issues in 15 years, from tiny teardrops to 45-foot diesel pushers. We stock the right parts, use the right tools, and stand behind the work. We’re licensed and insured in Florida. We carry liability and garage keepers. Our warranty is 12 months parts and labor on electrical repairs. And we answer the phone. Real person. Real times.

Mid-article CTA: Call to schedule rv electrical repair, or request a free estimate online. We’ll give emergency rv repair you a straight price and a clear plan before we start.

How much does RV electrical repair cost in Port St. Lucie? Most jobs land between $189 and $1,480. Diagnostic is $129, then $129 per hour after the first 45 minutes. Common parts like GFCIs and capacitors are under $120. Bigger items like converters, inverters, or transfer switches run a few hundred for parts plus 1.5 to 4 hours labor.

Can you come to my campsite for mobile rv repair? Yes, we do mobile rv repair anywhere in St. Lucie County and the Treasure Coast. The on-site fee is $60 locally. We’re in Tradition, St. Lucie West, and River Park daily. After-hours emergency service is available for a $95 flat add-on.

Why do my lights dim when the water pump runs? That’s low DC voltage or excessive resistance in a cable or connection. Could be sulfated batteries, a weak converter, or a loose ground. We test battery voltage at rest and under load, measure voltage drop, and fix the actual bottleneck, not just the symptom.

My RV AC hums but won’t start. What’s wrong? Most likely a failed start or run capacitor, sometimes a stuck fan. We replace capacitors from Dometic or Coleman-Mach in about 20 to 40 minutes. If voltage at the pedestal is low, we’ll recommend an EMS because running an AC under 108 VAC can damage the compressor.

Why does my GFCI keep tripping in the bathroom? Common causes are wet exterior outlets, reversed neutral and ground on a downstream receptacle, or a defective GFCI. We test each outlet, verify correct wiring, and replace the GFCI if needed. Parts are $29 to $45, and labor is usually under an hour.

Do I need a surge protector or an EMS in Florida? Yes. We install Progressive Industries EMS units that block low voltage, open neutral, and surges. Florida storms and campground sags are rough on RVs. An EMS protects your AC compressor, microwave, and converter from bad power. It pays for itself the first time it trips.

How long do RV batteries last here on the coast? Flooded lead-acid, 2 to 4 years if you maintain water and charge profiles. AGM, 4 to 6 years. Lithium, 8 to 10 years with a good BMS. Heat and humidity shorten life. We set proper float and absorption voltages and check parasitic draws to extend life.

Will you work on my generator if it won’t power the coach? Yes. We service Onan gas and diesel sets. If it starts but no power, we test output voltage and frequency, check the onboard breaker, and verify transfer switch function. Many fixes are under two hours. Regulators or control boards cost more, but we’ll quote before repair.

Can you add solar and an inverter to run my fridge? We design and install solar and inverter systems weekly. Typical starter setup is 400 to 600 watts solar with a 2,000W pure sine inverter and lithium bank. Parts and labor range from $2,800 to $6,900 depending on components. We program charge profiles and label everything.

If you searched for rv ac repair, rv refrigerator repair, rv furnace repair, rv water heater repair, rv appliance repair, rv generator repair, rv solar repair, rv battery repair, rv plumbing repair, rv water leak repair, rv roof leak repair, rv slide out repair, rv leveling jack repair, or rv awning repair, we do that too. See our pages on RV AC repair, RV refrigerator service, and RV slide out repair for details.

We also link to manufacturer resources:

You’ll get a text when we’re rolling. We park thoughtfully so we’re not blocking the loop. We ask you to cut big loads while we test. We’ll show you meter readings and any heat damage photos. If a part’s needed, we’ll tell you if we have it in the truck or the exact ETA. Most jobs wrap same day. If weather turns, we can tent a work area or reschedule fast.

We test the pedestal first. Bad shore power can mimic coach wiring faults.

Call now for same day rv electrical repair in Port St. Lucie and across , . Or request a free estimate online. We’ll pin down the fault, give you a price, and get you back to cold air and hot coffee.

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Remember, if your RV smells like hot plastic or you see arcing, kill power and call. Don’t keep resetting a tripping breaker. It’s telling you the truth.

Final note for searchers: if you typed rv repair near me, mobile rv repair, emergency rv repair, same day rv repair, camper repair near me, or motorhome repair near me, yes, we do all of that. Electrical first. Always.

We fix rv electrical repair issues the right way the first time. Call .

A1 RV Repair

RV repair shop

1961 SW South Macedo Blvd #303, Port St. Lucie, FL 34984
Open now
Monday - Sunday
7 AM–8 PM

Veteran-owned
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