Best RV Generator Fuel Tank Options for Extended Runs
Answering the common buyer need: for RV enthusiasts, selecting the right portable fuel tank ensures longer runtimes, easy transport, and safe storage for your generator. The following five options are chosen for their compatibility with popular generators, built-in gauges, and portability. They cater to dry camping, RV trips, or boat-to-camp adventures where fuel efficiency and quick refueling matter. The table below highlights the core strengths of each model to help you compare at a glance.
| Product | Capacity | Best For |
|---|---|---|
| Scepter 12 Gallon Portable Marine Gas Can | 12 gallons / 45 L | Boaters and RVers needing long run times with built-in gauge |
| VEVOR 3.17-Gallon Marine Fuel Tank | 3.17 gallons / 12 L | Compact storage and easy transport for small generators |
| Attwood 6-Gallon Portable Fuel Tank | 6 gallons | EPA/CARB-compliant option for smaller to mid-size generators |
| JJing Universal 5-Gallon Generator Gas Tank | 5 gallons | Compatible with many common generators; gauge included |
| E-Gaultra EC2500 Fuel Tank | 5 gallons | Model-compatible option with multiple generator brands |
Scepter 12 Gallon Portable Marine Gas Can
Capacity and practicality define this option. At 12 gallons, it provides extended running time for larger RV generators or longer trips between fuel stops. The 2-way vented cap controls vapor buildup while refueling, improving safety. Its built-in fuel gauge allows quick checks without removing the cap, and the design integrates a pick-up for easier transfer. Best for boaters who also use their RV gear, or RVers who need substantial fuel reserves at camp.
Best for: RV owners needing long-running power without frequent refuels; boaters who want a dual-purpose fuel can. Caution: heavier than smaller tanks, may require extra storage space and handling effort.
VEVOR 3.17-Gallon Marine Fuel Tank
This compact 3.17-gallon tank is designed for easy transport and storage, fitting well under seats or in small compartments. It includes a 9.8 ft hose and is built from high-density polyethylene to resist aging and impact. It’s a strong fit for smaller generators or RV setups that require a portable tank with a longer reach to fuel lines. Note: avoid prolonged direct sunlight to prevent aging.
Best for: RVers with a compact generator footprint or boats needing a lightweight, space-saving fuel source; better for shorter trips with frequent refueling. Limitation: smaller capacity means more frequent fuel stops for longer trips.
Attwood 8806LP2 EPA Certified 6-Gallon Tank
Attwood’s tank is EPA and CARB compliant, with a cap that includes a built-in vacuum valve to avoid manual venting. This reduces handling steps and ensures safer pressure management during fueling. Its 6-gallon capacity sits in a practical middle ground for mid-size generators used in RVs or marine setups. Best for: RV travelers who want a compliant, easy-to-use tank with straightforward venting. Caution: check compatibility with your generator’s inlet fittings before purchase.
JJing Universal 5-Gallon Generator Gas Tank
Designed for compatibility with a range of popular generators, this 5-gallon tank includes a built-in fuel gauge and rubber grommets. Its mounting dimensions are clearly specified to help buyers verify fit with their generator models. Best for: RVs and campers using common Honda, Predator, or Champion-style generators. Limitation: lacks a vent valve, so it is not suitable where vented operation is required.
E-Gaultra EC2500 Fuel Tank
Fitting Honda EC2500 and other common generator models, this 5-gallon tank aims to serve a broad range of brands. It comes with a 14L (4-gallon) capacity option label and is marketed as a kit. Best for: buyers who want a flexible, multi-brand tank solution. Caution: verify exact model compatibility and note that some listings refer to kit contents rather than a single tank with all fittings included.
Buying Guide
What size should you choose? Consider your typical generator runtime and how far you travel between refuels. Larger tanks deliver longer runs but require more storage space and heavier handling. How important is a built-in gauge? Tanks with integrated gauges save time and reduce guesswork. Do you need a vented cap? Venting helps prevent pressure buildup and spills, especially with ethanol-blended fuels. Check fuel compatibility with your generator and local fuel types (gasoline, diesel, ethanol blends). Are dimensions clear? Read mounting hole distances and overall height to ensure a proper fit under seats or in cargo compartments.
Key considerations at a glance
- Capacity vs. storage: Larger capacity for longer trips; smaller tanks for compact RVs.
- Vent system: Vented caps prevent vapor pressure; non-vented tanks may require manual venting.
- Fuel type compatibility: Ensure the tank supports your fuel (gasoline, diesel, ethanol blends).
- Mounting and fittings: Verify dimensions and that grommets or gauges match your setup.
- Portability: Handles and lightness improve on-the-go refueling during camping or boating.
FAQ
- What is the best tank for a medium-size RV generator?
– A 5–6 gallon portable tank often offers a balance of capacity and portability, with options like the Attwood 6-Gallon or JJing 5-Gallon Tank. - Do all RV fuel tanks have built-in gauges?
– No, but several models include a gauge or sight line, which helps monitor remaining fuel quickly. - Are vented caps necessary?
– Vented caps prevent dangerous vapor buildup during refueling; some models include vented caps by design. - How do I verify compatibility with my generator?
– Check mounting dimensions, hose fittings, and whether the tank supports your generator’s fuel type and capacity. - Can I use diesel in a gasoline tank?
– Most listed tanks are designed for gasoline; using diesel should only be done if the tank explicitly supports it.