RV Battery & Electrical Repair in Tucson, AZ
Tucson's heat is brutal on lead-acid RV batteries — high ambient temperature accelerates plate corrosion and shortens battery life more than almost any other climate factor. Shawn tests, maintains, and replaces RV battery banks on-site, along with the inverters, converters, and 12V/110V wiring that go with them.
Most RV battery complaints aren't actually a dead battery — they're a corroded terminal, a bad ground, a converter that's no longer charging correctly, or a battery that's simply cooked from months of Tucson heat sitting in a storage lot. A proper diagnosis starts with a load test on every cell, not just a visual check.
Whether it's flooded lead-acid, AGM, or a lithium (LiFePO4) upgrade, Shawn tests the full charging path — battery, converter/charger, solar controller if equipped, and the wiring in between — before recommending a replacement, since swapping batteries onto a bad charging system just repeats the failure.
Technician performing lead-acid battery maintenance
Technician checking RV inverter and wiring panelIs this what's happening to your RV?
Battery won't hold a charge overnight
Points to either a dying cell inside the battery or a parasitic draw somewhere in the 12V system — both are diagnosable with a load test.
Corroded or crusty battery terminals
White or blue-green crust on the terminals restricts current flow and mimics a weak battery — often a five-minute fix once caught.
Converter fan runs constantly or never runs
Either extreme suggests the converter/charger itself needs service — a healthy unit should cycle based on actual charging demand.
Get a rough idea before you call
These are general mobile-repair ranges, not a final quote — every unit and part is different. Shawn confirms exact pricing after a quick phone diagnosis or on-site look.
Frequently asked questions
Yes — lithium conversions, including confirming the converter/charger and any inverter are lithium-compatible before the swap, since a lead-acid-only charger can damage lithium cells.
Yes — a parasitic draw (something pulling power while the RV sits) is the most common cause, and it's traceable with a multimeter test at the battery terminal.
Yes — solar controller diagnosis and panel/controller installs are part of the same 12V electrical service.
Tell us what's going on
Call or Text
(520) 818-2310Based In
2749 N Orchard Ave, Suite A
Tucson, AZ 85712
Hours
Mon–Fri, 8:30 AM – 6:00 PM
By appointment — call to check availability