Converter and inverter diagnosis, repair, and replacement — the components that charge your batteries and run your AC outlets off battery power. Serviced at your driveway, storage facility, or campsite across Utah and Texas.
Converter and inverter service from Mobile RV Pro covers the two components that manage your RV’s power conversion: the converter, which charges your batteries and runs 12V systems from shore power, and the inverter, which produces 120V AC from your batteries for outlets and appliances when you are off-grid. Symptoms like batteries that will not charge on shore power, dead 12V systems while plugged in, or no outlet power when boondocking usually trace to one of these. Mobile RV Pro services WFCO, Progressive Dynamics, Parallax, Iota, Victron, Magnum, and Xantrex units across Utah and Texas. Certified technicians, written estimate before any work begins. For broader 12V and 120V faults, see our Electrical Repair page.
Converter and inverter faults masquerade as battery problems — owners often replace good batteries when the real issue is the charger that is supposed to maintain them. Isolating the converter and inverter from the battery is the first diagnostic step.
Plugged into shore power but the batteries stay low or die overnight — the converter is not charging. This is the classic converter failure, often blamed on the batteries instead.
Lights, fans, and 12V systems dead even on shore power points to a failed converter or a blown converter fuse — the converter feeds the 12V side when shore power is connected.
Outlets dead while off-grid means the inverter is not producing 120V from the batteries — a failed inverter, a tripped inverter fault, or it never switched on.
A converter that runs hot or whose cooling fan never stops may be failing or overloaded. Left alone it can shorten battery life or quit entirely.
A converter stuck in high-output mode overcharges and cooks the batteries — especially damaging to lithium. The converter's charge profile or control board has failed.
An inverter that alarms or cuts out when you run an appliance may be undersized, faulting on low battery voltage, or failing. Diagnosis confirms which.
Before replacing batteries that “will not hold a charge,” have the converter checked — a failed converter is far more often the cause than bad batteries, and replacing the batteries without fixing the converter just kills the new ones too. If you have lithium batteries, a converter with the wrong charge profile can damage them; this is worth checking proactively. We can isolate the converter, inverter, and batteries on a single visit.
Mobile RV Pro services the full range of RV power-conversion equipment, from basic converters to inverter/chargers and lithium-compatible units. Common converters and fuses ride on the truck for single-visit repair.
Pricing depends on whether the unit can be repaired (fuse, fan, control board) or needs replacement, and on the size of the inverter. A blown converter fuse is the low end; a large inverter/charger replacement the upper end. Ranges below are all-in: diagnostic, labor, and parts at typical cost.
| Repair Type | Typical Labor Range | Notes |
|---|---|---|
| Converter / inverter diagnostic | $150 – $270 | Isolate converter, inverter, and battery |
| Converter fuse / fan repair | $140 – $280 | Common low-cost fix; same-visit |
| Converter replacement | $320 – $640 | WFCO, Progressive Dynamics, Parallax |
| Lithium-compatible converter upgrade | $420 – $780 | Correct charge profile for LiFePO4 |
| Inverter replacement (small / mid) | $500 – $1,400 | Pure sine; depends on wattage |
| Inverter/charger replacement (large) | $1,400 – $3,200 | Victron / Magnum on larger systems |
| Transfer switch replacement | $340 – $620 | Auto-switching shore/generator/inverter |
| Diagnostic only (no repair) | $270 – $360 | Walk-away price if you decline repair |
Mobile RV Pro provides a written estimate before any work begins. If you are running or planning a lithium battery bank, confirming the converter and inverter have the correct charge profile is critical — the wrong profile damages lithium cells. See also our Lithium Battery and Electrical Repair pages for related work, often handled in the same visit.
Mobile RV Pro technicians are certified, background-checked, and carry full liability insurance. The company is licensed and insured to perform RV repair across Utah and Texas. If a technician damages any component while performing a hired repair, Mobile RV Pro covers the replacement 100% — both parts and labor.
Mobile RV Pro is an authorized warranty coordinator for most major extended warranty providers including Good Sam, Wholesale Warranties, Cornerstone, and National General. We coordinate repairs and payment directly with extended warranty companies on your behalf — at no extra charge.
The single most common mistake in RV power problems is replacing batteries that are fine because the converter that is supposed to charge them has failed — then watching the new batteries die too. Mobile RV Pro isolates the converter, inverter, and battery bank as separate systems and tells you which one actually failed before you spend money on parts. For lithium owners, we verify the charge profile is correct so the converter is maintaining the bank, not cooking it. Certified technicians, written estimate before any work begins.
Certified technicians dispatched to your location — driveway, storage facility, or campsite. No haul-in, no storage fees.
Power-conversion faults are easy to misdiagnose as battery failures, and dealerships often replace the whole power center rather than isolate the fault. Mobile diagnosis isolates the real failure on-site, often saving the cost of unnecessary parts.
| Mobile RV Pro | Dealership | |
|---|---|---|
| Fault isolation | Converter vs. inverter vs. battery | Often "replace the power center" |
| Lithium charge profile | Verified and configured | Frequently overlooked |
| Service location | Your driveway or campsite | Drop-off only |
| Common converters stocked | On the truck | Often ordered in |
| Written estimate | Always before work | Often after diagnostic |
