RV Electrical & Battery Systems: Complete Guide
Master your RV electrical system from house batteries to shore power. Covers 12V DC, 120V AC, inverters, and charging.
Master your RV electrical system from house batteries to shore power. Covers 12V DC, 120V AC, inverters, and charging.
Keep your RV generator running reliably with this comprehensive maintenance and troubleshooting guide for Onan, Generac, and Cummins units.
Your 1993 American Eagle's Onan generator producing only 12-15 volts indicates a faulty rectifier bridge (part CR21) or suppressor (part RV21). The correct replacement parts are 305-0696 for the rectifier bridge and 305-0703 for the suppressor.
Compare electrical systems between motorhomes and toy haulers. Covers battery setups, power demands, and generator needs for each RV type.
Fix your RV refrigerator with this guide covering Dometic, Norcold, and residential fridge issues.
Consistent 2-minute shutdown under load indicates fuel delivery cannot keep up with demand. Check fuel pump, bleed system, verify no restrictions. Also check if generator is undersized for AC load - may need soft start on AC unit.
Even with disconnect switches engaged, phantom loads and battery self-discharge can drain RV batteries during storage. Installing battery maintainers, using master disconnect switches, and addressing phantom loads will solve this issue.
Your generator likely uses the chassis battery and may have a weak connection or failing starting battery. The main engine alternator charges the chassis battery when running, explaining why the generator starts after running the engine.
Onan fault codes display via LED blinks or digital display. Common codes include 12-overspeed, 13-low oil, 14-high temp. Consult model-specific service manual for complete code list. Persistent codes may require professional diagnosis.
Yes, you can remove inverter/charger and install standalone battery charger. Much less expensive than replacement inverter. Check if inverter includes transfer switch - you may need to address that. IOTA or Progressive Dynamics chargers work well.
Generator surging is typically caused by a dirty carburetor, fuel system issues, or governor problems. Start by cleaning the carburetor and air filter, then check fuel quality and governor linkage.
The Onan 5500 can be tuned up with quality aftermarket parts when OEM parts are unavailable. Use NGK 3432 spark plugs, Wix 57358 oil filter (not 57398), and zinc-containing oils like Rotella T6 for optimal performance.
Several Ford dealers in South Florida service E-450 chassis including Delray Ford, AutoNation Ford, and Maroone Ford. Call ahead to confirm RV chassis service availability and bring your chassis warranty documentation.
Code 14 is overspeed but your real issue is carburetor gummed from sitting. Choke mechanism needs cleaning to operate automatically. Clean carburetor thoroughly - jets and choke linkage. Use fresh fuel and add stabilizer to prevent future issues.
Triple E built quality coaches in Canada. At 24 years old, focus on this specific units condition rather than brand reputation. Critical inspection points: water damage, engine hours, service history, roof seals. Get professional NRVIA inspection before buying.