When the power goes out, your inverter generator becomes a lifeline. But managing gasoline cans is inconvenient, and propane tanks run out. What if you could tap into your home’s existing natural gas line for a nearly endless fuel supply? Converting your generator offers this freedom, providing clean-burning, reliable power without the fuel storage hassle.
This guide focuses on the best natural gas conversion kits specifically designed for popular inverter generator models. We’ve assessed key products based on compatibility, installation complexity, and performance to help you make an informed decision. For a broader look at options for different generator types, explore our guide on the best natural gas conversion kits for portable generators.
Pros
- True tri-fuel capability provides significant cost savings compared to gasoline-only operation
- Durable metal and plastic construction designed for commercial-grade reliability
- Flexible fuel options eliminate dependence on single fuel type availability
- Compatible with standard aftermarket regulators for easy system customization
- Solid 4.2-star user rating demonstrates proven performance in real-world applications
Cons
- Requires case modification to accommodate alternative fuel supply hose installation
- Requires compatible regulator purchase, which is not included in the kit
- Low-pressure fuel system requires precise inlet pressure settings for optimal performance
The Nashfuel Tri-Fuel Conversion Kit is a specialized upgrade for Predator 3500W inverter generator owners seeking multi-fuel flexibility. This kit allows you to switch between propane, natural gas, and gasoline, making it valuable for homeowners needing backup power, commercial contractors managing job site equipment, and anyone looking to optimize fuel costs and availability.
The standout feature is genuine tri-fuel capability without replacing your entire generator. You get the convenience of running cheaper natural gas or propane when available, then switching to gasoline as a backup. The kit operates on low-pressure fuel supply requiring 9-13.8 inches water column inlet pressure, and works with both Impco and aftermarket regulators for system flexibility. This design approach appeals to users who want options rather than being locked into one fuel source.
Build quality reflects commercial-grade standards with metal and plastic components engineered for durability. The conversion kit integrates directly with your Predator 3500 generator without replacing core components. However, installation demands case modification to route the alternative fuel supply hose, which requires mechanical skill or professional installation. This is not a plug-and-play upgrade.
The main drawback is that a compatible regulator must be purchased separately, adding to overall project cost. Additionally, the low-pressure fuel system requires careful setup and maintenance to ensure proper inlet pressure specifications are met. Users unfamiliar with fuel system work should budget for professional installation.
For Predator 3500 generator owners committed to multi-fuel capability and willing to invest time in proper installation, this conversion kit delivers real value through operational flexibility and potential long-term fuel savings. The solid user rating confirms it performs as intended when properly installed.
Generator Compatibility: Predator model 63584 inverter generator
Power Output: 3500 watts maximum wattage
Voltage: 175 volts
Fuel Options: Propane (low pressure), natural gas (low pressure), gasoline
Required Inlet Pressure: 9-13.8 inches water column
Regulator Compatibility: Impco or aftermarket regulators
Components: Tri-fuel conversion kit with metal and plastic construction
Installation: Case modification required for alternative fuel supply hose routing
Is this right for you? This conversion kit suits Predator 3500 generator owners who want multi-fuel flexibility and are comfortable with installation requirements. It's ideal for backup power systems, commercial job sites, or applications where fuel availability varies.
Installation Considerations: Plan for case modification work, which requires mechanical aptitude or professional help. Budget for a compatible regulator separately. Ensure your fuel supply can deliver the required 9-13.8 inches water column inlet pressure.
Cost Planning: Factor in regulator purchase and potential professional installation costs beyond the kit price. Calculate long-term savings based on your local propane and natural gas pricing versus gasoline.
Maintenance: Regular inspection of fuel lines, regulator settings, and pressure specifications ensures reliable operation. Keep documentation on fuel system setup for reference during maintenance cycles.
Buying Guide: Choosing Your Conversion Kit
Generator Model Compatibility
The single most critical factor is ensuring the kit is designed for your specific generator model. A kit for a Westinghouse WGEN9500DF will not fit a Predator 3500. Check the manufacturer’s compatibility list carefully before purchasing.
Using an incompatible kit can lead to poor performance, engine damage, or dangerous fuel leaks. Always confirm the exact match for your generator’s make, model, and engine type. For more information on generators that run on this fuel type, visit our Natural Gas Generators category.
Fuel Type Flexibility
Consider whether you want a dual-fuel or tri-fuel conversion. A dual-fuel kit typically converts your generator to run on natural gas while retaining gasoline capability. A tri-fuel kit adds propane as a third option, offering maximum versatility.
Tri-fuel capability is valuable if you travel or want a backup fuel option when natural gas is unavailable. Assess your typical usage scenarios to decide which flexibility level you need. Learn more about this flexibility in our Tri-Fuel Generators section.
Installation Requirements
Installation complexity varies significantly between kits. Some require no permanent modifications, using existing carburetor ports. Others may need case modifications to route the new fuel hose, which involves drilling.
If you’re not comfortable with mechanical work, look for a ‘no-modification’ kit or budget for professional installation. Proper installation is crucial for safe and efficient operation, especially in varied conditions as discussed in our article on natural gas generators for cold weather.
Required Regulator and Pressure
All natural gas conversion kits require an external regulator. They specify a required inlet pressure, commonly 9-13.8 inches of water column (“wc). You must ensure your home’s natural gas supply can provide this pressure at the generator’s location.
You may need to purchase a compatible Impco or aftermarket regulator separately. Verify the kit’s specifications and consult a licensed gas fitter to assess your supply line if unsure. This is a key part of setting up a reliable dual-fuel system.
Final Thoughts
Converting your inverter generator to natural gas is a smart upgrade for homeowners seeking convenient, long-term backup power. For those with a Westinghouse WGEN9500DF, the Natural Gas Conversion Kit fits Westinghouse offers a straightforward solution that maintains gasoline capability. If you own a Predator 3500 and desire maximum fuel flexibility, the Propane Natural Gas Conversion Predator 3500 provides a robust tri-fuel option. Always prioritize a kit with confirmed compatibility for your specific model and follow all safety guidelines during installation.
Frequently Asked Questions
Will using natural gas reduce my generator’s power output?
Yes, it’s common to experience a slight reduction in wattage output, typically around 10-15%, when running on natural gas compared to gasoline. This is due to the lower energy density of natural gas. Your generator will still function effectively for most essential loads.
Can I install a conversion kit myself?
Many kits are designed for DIY installation by mechanically inclined individuals, especially those requiring no permanent modifications. However, the natural gas line connection must be performed by a licensed professional to ensure it is leak-free and meets all local plumbing and gas codes for safety.
Is a conversion kit safe for my generator’s engine?
A properly installed and calibrated conversion kit from a reputable manufacturer is safe for your engine. Natural gas burns cleaner than gasoline, which can actually result in less carbon buildup over time. Always use a kit specifically designed for your engine model to prevent issues.
Do I need any other parts besides the kit?
Most kits require you to supply the correct low-pressure regulator (often an Impco model) and the necessary natural gas hose or piping to connect from your home’s gas line to the generator’s location. Always review the kit’s requirements list before ordering.
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