How do I properly store an RV with a generator?

Properly storing an RV with a generator is a critical step in protecting a significant investment and ensuring reliable performance for your next adventure. A generator is a complex piece of machinery that requires specific care during periods of inactivity to prevent costly repairs, fuel system issues, and starting failures. This guide will walk you through the essential steps for short-term and long-term storage, helping you safeguard your generator's lifespan.

Pre-Storage Preparation: The Foundation of Care

Before parking your RV for an extended period, dedicating time to prepare the generator is non-negotiable. The primary enemies during storage are stale fuel, moisture, and corrosion. Following a systematic approach will mitigate these risks.

1. Run the Generator Under Load

Plan to run the generator for at least two hours with a substantial electrical load-around 50% to 75% of its capacity-before storage. This brings the entire system to full operating temperature, which helps vaporize moisture in the oil and exhaust system and circulates fresh, stabilized fuel through the carburetor or fuel injectors. Simply idling is not sufficient.

2. Stabilize the Fuel System

This is arguably the most important step. Old gasoline can degrade, forming gums and varnishes that clog fuel lines, carburetors, and injectors. For gasoline generators, add a high-quality fuel stabilizer (like STA-BIL or Sea Foam) to the RV's fuel tank before your final run. This ensures the treated fuel circulates throughout the entire system, including the generator's own fuel lines and components. For diesel generators, consult your manufacturer's recommendations, as diesel fuel also requires stabilization or biocides to prevent microbial growth. Industry findings consistently cite fuel system degradation as a leading cause of generator failure after storage.

3. Change the Oil and Filter

Used engine oil contains contaminants and acids that can corrode internal components over time. Changing the oil and filter immediately after the final loaded run, while the engine is still warm, ensures fresh, clean oil is protecting the engine internals during storage. Refer to your owner's manual for the correct oil type and capacity.

4. Disconnect and Maintain the Battery

The generator's starting battery must be protected. Disconnect the negative battery cable to prevent parasitic drain. Clean the terminals and apply a protective spray. The battery should be stored in a cool, dry place and kept on a maintenance charger or smart battery tender to prevent sulfation and maintain a full charge. Never store a discharged battery.

5. Protect the Air Intake and Exhaust

Rodents and insects seek sheltered spaces. Seal the generator's air intake and exhaust outlet with plastic bags or specially designed covers, securing them with tape or rubber bands. Place rodent repellent packets nearby as an extra deterrent. Ensure you place a prominent note inside the RV to remind yourself to remove these covers before the next startup.

Long-Term Storage Considerations

For storage exceeding several months, especially over winter, additional measures are prudent.

• Fogging the Engine: For carbureted gasoline generators, introducing "fogging oil" into the air intake while the engine is running coats the cylinder walls and internal components with a protective film to prevent rust. Consult your manual for the proper procedure.
• Fuel Tank Level: A common debate exists between storing with a full or empty tank. For gasoline, a full tank minimizes air space, reducing condensation and fuel oxidation. For diesel, a full tank is also generally recommended to prevent condensation. However, always prioritize using stabilized fuel, regardless of tank level.
• Exercise Schedule: If possible, start and run the generator under load every 30-60 days for about an hour. This re-lubricates components, cycles the fuel, and charges the battery. This is often required to maintain warranty coverage on many residential standby generators, and the principle applies to RV units.

Choosing the Right Storage Environment

Where you store your RV significantly impacts your generator's health.

• Indoor vs. Covered vs. Outdoor: Indoor storage in a climate-controlled unit offers the best protection from temperature extremes, humidity, and precipitation. Covered storage (a roof only) shields from sun and rain but not from humidity or cold. Outdoor storage exposes the generator to all elements, accelerating wear. A study on engine corrosion highlights that consistent temperature and humidity control drastically reduces the rate of metal degradation.
• Security and Access: Choose a reputable storage facility with gated access, good lighting, and surveillance cameras. Reliable security provides peace of mind for your entire RV investment.

Post-Storage Startup Procedure

When you're ready to hit the road again, a careful restart is key.

1. Remove all intake and exhaust covers.
2. Reconnect a fully charged battery, ensuring terminals are tight and clean.
3. Check engine oil and coolant levels.
4. Turn on the fuel supply valve.
5. Start the generator and let it run with a moderate load for at least 30 minutes to burn off any residual stabilizer and ensure smooth operation.

Proper RV generator storage is a blend of mechanical preparation and choosing a suitable storage environment. By following these authoritative steps-fuel stabilization, oil changes, battery care, and environmental protection-you invest in the longevity and reliability of your RV's power system. Always consult your specific generator owner's manual for model-specific instructions and confirm any facility rules regarding maintenance or operation while in storage. Finally, review your RV insurance policy to understand coverage terms for stored vehicles and their components.