Best RV Generator Fuel Tanks for Extended on-the-Go Power
When choosing a fuel tank for an RV generator, prioritize capacity, compatibility, and venting to avoid spills and fuel vapor buildup. This guide highlights five versatile options that fit a range of generators and boating scenarios, helping you minimize refueling stops and maximize run time. The top picks are ideal for campers, anglers, and RV travelers who need reliable fuel storage on the go while keeping safety in mind.
| Product | Capacity | Best For | Notes |
|---|---|---|---|
| Scepter 12 Gallon Portable Marine Gas Can | 12 gal | Boats and RVs with outboard setups | Built-in gauge, 2-way vented cap |
| VEVOR Boat Fuel Tank | 3.17 gal | Compact spaces, easy transport | Long hose included, strong HDPE |
| Attwood 6 Gallon Portable Fuel Tank | 6 gal | EPA certified, quick refuel | Built-in vacuum valve |
| JJing Universal 5 Gallon Generator Tank | 5 gal | Generator compatibility | Includes gauge; note vent valve absence |
| Westinghouse 4650 Peak Watt Generator | 4 gal tank (gas) | RV-ready power with multiple outlets | CO sensor, propane option |
Scepter 12 Gallon Portable Marine Gas Can
The Scepter tank offers a generous 12-gallon capacity with a compact, tall profile suited for boats and trailers where space is at a premium. It includes a built-in fuel gauge and a 2-way vented cap to manage pressure and vapor buildup during refueling. This model is compatible with diesel and ethanol-blended fuels, expanding its usefulness for mixed-fuel setups. The integrated pickup and gauge enable quick level checks without extra tools. Best for boaters or RV owners who need longer running time between refills and want a single, visible fuel level indicator. A potential limitation is the reliance on separate fuel line fittings for some installations, which may require a compatible connection kit.
VEVOR Boat Fuel Tank, 3.17-Gallon
This 3.17-gallon tank emphasizes portability, with a 9.8 ft (3 m) hose and a sturdy HDPE build that resists aging and corrosion. It is compatible with Yamaha connectors, making it a practical choice for smaller outboard setups or deck boats. It’s best for users needing a compact spare tank that fits under seats or in tight storage areas. A caution is to avoid prolonged direct sunlight exposure to minimize aging and expansion risks, which can affect fit and longevity.
Attwood 8806LP2 EPA Certified 6 Gallon Tank
The Attwood 6-gallon tank is EPA and CARB certified, offering a built-in vacuum valve for automatic venting, which reduces manual steps during refueling. Best for RV owners or marine users who value regulatory compliance and a simple venting solution. The main limitation is that the cap venting is automatic, so users should ensure the system remains leak-free during transport and storage to prevent vapor release or spills.
JJing Universal 5 Gallon Generator Tank
JJing’s 5-gallon tank is built for generator compatibility, including a gauge and built-in rubber grommets. It’s suitable for a wide range of portable generators, making it a flexible choice for RVs with generator units. Choose this if you need a mid-size, gauge-equipped tank that fits several popular generator brands. Note that this model does not include a vent valve; if venting is a priority, consider alternatives with a vented cap to prevent pressure buildup during use.
E-Gaultra EC2500 Fuel Tank
The E-Gaultra EC2500 tank is designed as a versatile fit for multiple generator models, including Honda EC2500, Predator, Champion, and Duromax units. It comes as a 14L (about 3.7 gallons) or 4 gallon option in some listings and emphasizes compatibility across brands. Best for buyers seeking a cross-brand tank that can replace existing OEM tanks without major modifications. A limitation is that exact capacity and venting may vary by listing, so verify your generator’s needs before purchase.
Westinghouse 4650 Peak Watt Generator
The Westinghouse generator offers dual-fuel capability and a four-gallon fuel tank with an integrated gauge, along with CO sensor capabilities for improved safety. It is RV-ready with multiple outlets, including a 30-amp RV receptacle, making it a strong option for on-site power with flexible fueling. Choose this if you want an all-in-one portable power solution with built-in safety features. A caveat is the relatively small factory tank capacity, which may require more frequent refueling on longer trips.
Buying Guide
What should you consider when choosing an RV generator fuel tank?
- Fuel capacity: Larger tanks reduce refueling frequency but require more storage space. Match capacity to your typical run time and vehicle storage.
- Compatibility: Check recommended fuels (gas, diesel, ethanol blends) and whether the tank mounts or hoses fit your generator model.
- Venting: Vented caps help prevent pressure buildup and spills during refueling or temperature changes. Determine if a vented or non-vented design best suits your setup.
- Gauge presence: Built-in gauges simplify monitoring fuel levels, especially when you’re on the move or operating multiple devices.
- Portability: Consider molded handles, weight when full, and storage space in your RV, boat, or trailer.
- Durability: Look for rugged HDPE or similar materials that resist corrosion, impact, and aging under sun exposure.
- Compatibility with fittings: Ensure the tank includes or is compatible with standard marine or generator fittings (like 1/4 NPT) for hoses and lines.
FAQ
- Do RV generator tanks require venting?
Yes, venting helps manage pressure and prevent vapor buildup during refueling and temperature changes. Some models have built-in vent caps; others require vented caps or separate venting accessories. - How do I choose tank capacity for an RV trip?
Estimate run time at your typical load and add a buffer for unexpected usage. If you travel long distances between stations, a larger tank can reduce refueling stops. - Are built-in gauges important?
They simplify monitoring and can prevent running out of fuel unexpectedly, especially in portable setups or when space limits direct viewing. - Can I use any fuel with these tanks?
Compatibility varies by model. Some tanks support diesel and ethanol blends, while others are gasoline-only. Verify fuel type before purchasing. - Is a vented tank always better than a non-vented one?
Vented tanks reduce pressure buildup but may slightly increase vapor release when subjected to heat. Non-vented tanks are simpler but require venting management if pressure rises. - Do these tanks fit a wide range of generators?
Many listed tanks are designed for multiple brands with compatible mounting dimensions. Always check hole-to-hole measurements and height to ensure a proper fit.