Tomahawk TG4500iEFI 4500W EFI Inverter Generator | E-Moto Charging & Backup Power
Tomahawk TG4500iEFI 4500W EFI Inverter Generator | E-Moto Charging & Backup Power
SKU: SKU:TG4500iEFI
Tomahawk TG4500iEFI 4500W EFI Inverter Generator | E-Moto Charging, Camping & Backup Power
More Efficient Portable Power with EFI Technology
The Tomahawk TG4500iEFI Inverter Generator is where portable power starts getting especially interesting for e-moto riders. With 3,800 rated watts, 4,500 starting watts, advanced inverter technology, Electronic Fuel Injection, and a 58.4 lb overall weight, you're getting substantial charging capability without moving into a massive generator platform.
For a track or camping setup, that extra output gives you room for a higher-powered e-moto charger while still leaving capacity for lights, a fridge, phones, tools, speakers, or other equipment. For professional use, the same generator can power compatible tools, electronics, appliances, and jobsite equipment.
The Electronic Fuel Injection system is one of the standout features. Rather than relying on a traditional carburetor, EFI electronically controls fuel delivery to improve fuel efficiency, starting performance, emissions, and operation across changing conditions. Add electric, remote, and manual starting, ECO Mode, CO Alert technology, 62 dBA operation, and up to 9 hours of runtime at quarter load, and the TG4500iEFI becomes a seriously versatile portable power source.
Clean Inverter Power
The TG4500iEFI uses advanced inverter technology to provide clean, stable AC power for compatible e-moto chargers, computers, electronics, tools, appliances, and other equipment.
For riders specifically looking for a generator to charge expensive e-moto battery systems and run electronics around camp or the pits, inverter technology is an important advantage. It is designed to provide more stable power than a basic conventional generator while still giving you the convenience of gasoline-powered runtime.
3800 Rated Watts in a 58.4 lb Package
One of the strongest features of the TG4500iEFI is its power-to-weight ratio. It provides 3,800 rated watts and 4,500 starting watts while weighing just 58.4 lbs.
That makes it particularly attractive for riders who need more charging headroom but still need to lift the generator into a truck, trailer, RV, or other vehicle. Its compact 20.7 x 12.2 x 19.7-inch dimensions also make it easier to fit alongside bikes and riding gear.
Quiet, Efficient Power for Camp or the Pits
At a listed 62 dBA, the TG4500iEFI is designed to keep noise more manageable around campsites, race pits, residential areas, and other locations where you don't want a loud conventional generator running all day.
ECO Mode adjusts engine operation based on electrical demand, helping reduce unnecessary fuel consumption and noise when you're not using the generator's full output.
What Size Generator Do I Need for My E-Moto?
Choosing a generator for your e-moto is pretty simple: size it based on your charger, not your bike's motor. A 20kW e-moto does not need a 20,000W generator.
Quick Formula:
Charger Watts + Other Equipment + 20 to 30% Headroom = Recommended Generator Size
Example: If your e-moto charger uses 1,000W and you want another 300W available for lights, a fridge, phones, or other gear:
1,000W + 300W = 1,300W
Add about 25% headroom and you should look for roughly 1,600W or more of continuous/running output.
The TG4500iEFI provides 3,800W of rated continuous output, giving you considerably more room than that example requires. This is where a generator starts becoming especially useful for riders with higher-output chargers, multiple bikes, or a full track and camping setup where charging is only one of several electrical loads.
For sustained charging, calculate your available power using the generator's 3,800W rated output. The 4,500W starting output is intended for short startup demands and should not be treated as continuous charging capacity.
If your charger lists AC input voltage and amperage rather than watts, you can get a quick estimate using Volts x Amps = Watts. When available, use the charger's listed AC input wattage or manufacturer specifications for the most accurate number.
Charging Multiple E-Motos
The 3,800W rated output gives the TG4500iEFI considerably more flexibility for multi-bike trips. Whether you can actually operate multiple chargers simultaneously depends on the AC input requirements of each charger.
For example, two chargers drawing 1,000W each would create approximately a 2,000W charging load. That would leave additional generator capacity for compatible lights, electronics, a refrigerator, tools, or other equipment. Two 1,500W chargers would create a 3,000W load before anything else is connected.
Always calculate the entire load and leave reasonable headroom rather than planning to operate the generator continuously at its maximum rated output.
Generator or Power Station?
Both can work. For fuel-powered generators, we generally recommend a quality inverter generator for charging e-motos and sensitive electronics. The TG4500iEFI combines inverter technology with the extended runtime and fast refueling advantages of a gasoline generator.
For portable battery power stations, check both the AC output wattage and battery capacity in Wh or kWh. Output determines whether the power station can run your charger, while capacity determines how much stored energy is available to put back into your bike. Normal AC conversion and charging losses also need to be considered.
Track, Camping & Emergency Use
If you're charging multiple e-motos or running additional equipment, add everything together. Your chargers, lights, refrigerator, tools, speakers, electronics, and other equipment all contribute to the generator's total load.
The combination of 3,800 rated watts, inverter technology, EFI, 58.4 lb weight, and a compact footprint makes the TG4500iEFI especially useful for race weekends, track days, camping, remote riding areas, construction sites, food trucks, and emergency backup power.
EV Charging
Some generators can potentially provide emergency charging for a Tesla or other EV, but EV charging has additional electrical, grounding, charging-equipment, and compatibility requirements. Do not assume a generator is compatible with an EV simply because it has sufficient wattage. Always verify compatibility with the vehicle, charging equipment, generator, and electrical requirements before attempting EV charging.
Why EFI Matters
EFI stands for Electronic Fuel Injection. Instead of using a traditional carburetor to mechanically meter fuel, EFI electronically controls fuel delivery based on engine operating conditions. This allows the engine to more precisely manage the fuel and air mixture.
- Improved Fuel Efficiency: More precise fuel delivery can reduce unnecessary fuel consumption across different operating conditions.
- Improved Engine Performance: Electronic fuel control provides more precise fueling as engine demand changes.
- Reduced Emissions: More controlled fuel delivery can support a cleaner and more efficient combustion process.
- Easier Starting: EFI automatically adjusts fueling during startup, including changing temperature and atmospheric conditions.
- Better Altitude Adaptation: EFI can compensate for changes in air density without the same manual adjustments commonly associated with carbureted engines.
- Reduced Carburetor Maintenance: There is no traditional carburetor with jets that require the same type of cleaning and adjustment.
For riders who travel between different elevations, store a generator between riding trips, or simply want modern fuel management, EFI is one of the TG4500iEFI's most useful upgrades.
Electric, Remote & Manual Starting
The TG4500iEFI gives you three starting options: electric, remote, and manual. The included remote control starter is especially convenient around camp, the pits, or a work area where you don't necessarily want to walk over to the generator every time you need to start it.
CO Alert & Built-In Protection
CO Alert technology monitors for dangerous carbon monoxide levels and automatically shuts the generator down when harmful levels are detected. The generator also includes low-oil shutdown and overload protection to help protect the engine, generator, and connected equipment.
Never operate a gasoline generator indoors, inside a vehicle or trailer, or in an enclosed space. Always follow the manufacturer's placement, ventilation, and carbon monoxide safety requirements.
Product Features
- Electronic Fuel Injection: Precise electronic fuel management designed to improve efficiency, starting, emissions, and operation across changing conditions.
- 3,800W Rated Output: Substantial continuous power for compatible e-moto chargers, electronics, tools, appliances, and other equipment.
- 4,500W Starting Output: Additional short-duration capacity for compatible loads with higher startup requirements.
- Advanced Inverter Technology: Produces clean, stable power suitable for compatible sensitive electronics and battery chargers.
- Electric, Remote & Manual Start: Three starting methods give you more flexibility at camp, the track, home, or work.
- CO Alert Technology: Detects dangerous carbon monoxide levels and automatically shuts down the generator when necessary.
- ECO Mode: Adjusts engine operation to electrical demand to help reduce fuel consumption and noise.
- Compact & Portable: Delivers substantial output from a 58.4 lb package measuring 20.7 x 12.2 x 19.7 inches.
- Quiet Operation: Rated at 62 dBA for more manageable operation around campsites, pits, and residential areas.
- Built-In Protection: Low-oil shutdown and overload protection help safeguard the engine and connected equipment.
- 2-Year Warranty: Backed by a comprehensive 2-year warranty and Tomahawk's nationwide service support.
Specifications
- Model: TG4500iEFI
- Engine: 159cc
- Fuel System: Electronic Fuel Injection / EFI
- Voltage: 120V
- Amperage: 20A at 120V
- Running Amperage: 37.5A
- 120V Outlets: 2
- 120V Twist-Lock Outlets: 1
- Starting Watts: 4,500W
- Rated Watts: 3,800W
- Start Type: Electric, Remote, Manual
- Fuel Tank Capacity: 1.6 gal / 6 liters
- Runtime: Up to 9 hours at 1/4 load
- Oil Type: SAE 10W-30
- Oil Capacity: 0.5 quarts
- Weight: 58.4 lbs / 26.5 kg
- Dimensions: 20.7 x 12.2 x 19.7 in / 540 x 310 x 500 mm
- Noise Level: 62 dBA
- ECO Mode: Yes
- CO Alert: Yes
Package Includes
- Tomahawk TG4500iEFI Inverter Generator
- Remote Control Starter
Applications
- E-moto charging
- Multiple compatible e-moto chargers
- Track days and race pits
- Camping and off-grid riding
- Recreational use
- Emergency backup power
- Construction and remote jobsites
- Computers and sensitive electronics
- Speakers and audio equipment
- Power tools and drills
- Power saws
- Indoor and outdoor lighting
- Food trucks
Who Is the TG4500iEFI Best For?
- E-Moto Riders with Higher Charging Demands: A strong option for riders using higher-output chargers, multiple compatible chargers, or a full track setup with additional electrical equipment.
- Track, Camping & Off-Grid Riders: EFI, remote start, ECO Mode, compact dimensions, and 3,800 rated watts make this a versatile generator for riding weekends away from normal power.
- Professional & Emergency Use: Clean inverter power for compatible tools, appliances, sensitive electronics, jobsites, food trucks, and home backup applications.
CARB Compliant
This product is CARB (California Air Resources Board) compliant, meeting strict air quality standards for safe and environmentally responsible use in California. This product meets the CARB exception for qualifying as construction equipment. For more information, please visit CARB's official website.
California Proposition 65 Warning
WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer. For more information, visit P65Warnings.ca.gov.
Info & Guides
- TG4500iEFI Specification Sheet
- TG4500iEFI Operation Manual
- TG4500iEFI Parts Diagram
- TG4500iEFI Circuit Diagram
- Generator Best Practices
Need Help Sizing a Generator for Your E-Moto?
Send the REV Rides team your bike model, charger specifications, and what else you want to power at the same time. We can help you determine how much generator output you should be looking for before you buy.
Frequently Asked Questions
Frequently Asked Questions
What's the Warranty? 2 years What Size Generator Do I Need to Charge My E-Moto? Charging your electric dirt bike or e-moto from a generator or portable power station is easier than it might sound. The most important number to look at is the power draw of your bike's charger, not the peak power of the bike's motor. A 20kW e-moto does not require a 20,000W generator to charge it. Your generator only needs to supply enough power for the charger and anything else you want to run at the same time. Quick Rule: Check Your Charger Look at the specifications on your e-moto charger. If the charger lists its AC input wattage, use that number. If you only know the approximate charger output voltage and amperage, you can estimate: Volts × Amps = Watts For example: 84V × 10A = approximately 840W Because of charging and conversion losses, actual AC power draw can be somewhat higher than this estimate. When possible, use the charger's listed AC input rating for the most accurate generator sizing. We also recommend leaving additional capacity instead of continuously operating a generator at its maximum output. For an e-moto charger drawing around 840W, a generator with approximately 1,200W or more of continuous output would provide useful additional headroom. Don't Size Your Generator Based on Your Bike's Motor This is one of the most important things to understand. If your e-moto has a: 8kW motor
12kW motor
20kW motor
25kW motor that does NOT mean you need an 8,000W, 12,000W, 20,000W, or 25,000W generator. The motor's power rating tells you how much power the bike can use while riding. The charger determines how much power is required from the generator while charging. Want to Charge Your E-Moto and Run Other Equipment? If you're heading to the track, camping, traveling, or preparing for an emergency, you may want your generator to do more than charge your bike. Simply add together the approximate wattage of everything you expect to operate at the same time. Example Track or Camping Setup E-Moto Charger: 900W
Portable Fridge: 100W
Lights: 100W
Laptop & Phones: 150W Estimated Simultaneous Load: 1,250W Instead of choosing a 1,250W generator and running it at or near maximum output, we recommend leaving some additional capacity. A generator with approximately 1,800–2,000W of continuous output would provide much more comfortable headroom for this example setup. Want to Charge Multiple E-Motos? You can do that too, as long as your generator has enough continuous output. For example: E-Moto Charger #1: 900W
E-Moto Charger #2: 900W
Other Equipment: 300W Total Load: 2,100W Add approximately 20–30% additional capacity and you're looking at roughly: 2,500–2,750W+ continuous generator output If you don't need to charge both bikes simultaneously, you can also charge one bike at a time and use a smaller generator. Battery Size vs. Generator Size Battery capacity and generator output are two different measurements. Your e-moto's battery capacity tells you approximately how much energy the battery can store. Your charger tells you approximately how quickly that energy needs to be supplied. Watts (W) = Power Watts tell you how much power your equipment needs at a particular moment. Watt-Hours (Wh) = Energy Watt-hours tell you how much energy a battery can store. For example, a 4,000Wh (4kWh) e-moto battery does NOT require a 4,000W generator. If the bike uses approximately a 1,000W charger, the generator only needs to comfortably support that charger's power requirements. A 4,000Wh battery being charged at approximately 1,000W could theoretically require around four hours of charging from empty, but real-world charging time will generally be longer due to charging losses, battery management, charge tapering, and other factors. What About Portable Battery Power Stations? You can also charge many e-motos using a sufficiently powerful portable battery power station. When choosing a power station, there are two important specifications to consider: 1. AC Output The power station's inverter needs to provide enough continuous AC wattage to operate your e-moto charger. 2. Battery Capacity The power station's Wh or kWh capacity determines approximately how much energy you have available to put back into your e-moto. For example: If your e-moto has a 4,000Wh battery and your portable power station stores 2,000Wh, you should NOT expect the power station to completely recharge the bike from empty. Actual energy transferred to the bike will also be lower than the power station's advertised capacity because some energy is lost through the inverter, charger, wiring, battery management system, and charging process. This is why both output wattage AND battery capacity matter when choosing a portable power station. Can I Use a Generator to Charge My E-Moto During an Emergency? Yes. A properly sized generator can be an excellent backup charging solution during power outages, emergencies, extended trips, or anywhere normal AC power isn't available. For modern e-motos and other sensitive electronics, we generally recommend a quality inverter generator with stable AC output. Always confirm that the generator's voltage, frequency, continuous output, and outlet configuration are compatible with your charger. IMPORTANT GENERATOR SAFETY Never operate a gas, propane, or other combustion-powered generator indoors, inside a garage, enclosed trailer, tent, vehicle, or other enclosed space. Generators produce carbon monoxide, which can be deadly. Always follow the generator manufacturer's operating, ventilation, fueling, grounding, maintenance, and safety instructions. Can I Charge a Tesla or Other Electric Vehicle? Potentially, but EV charging is significantly more demanding than charging most e-motos. Some properly configured generators may support emergency 120V Level 1 EV charging, while larger generators may be capable of supporting higher-output EV charging equipment. However, EV charging equipment can have specific requirements involving: Voltage
Continuous amperage
Generator wattage
Grounding/bonding configuration
Outlet type
EVSE compatibility Having enough advertised watts does not automatically mean a generator will successfully charge every EV. If charging a Tesla or another full-size EV is an important part of your intended use, choose a generator specifically suited for EV charging and verify compatibility with your vehicle and charging equipment. Quick Generator Sizing Guide What You Want to Power Suggested Starting Range Small E-Moto Charger 1,000–1,500W Larger/Faster E-Moto Charger 1,500–2,500W E-Moto + Camping Equipment 2,000–3,500W Multiple E-Motos 3,000W+ E-Moto + Larger Track/RV Setup 3,500W+ EV Emergency Charging Application Dependent These are general starting points. Always check the actual power requirements of your charger and equipment before selecting a generator. Easy Generator Sizing Formula If you're trying to figure out which generator is right for you, use this simple process: STEP 1: Find the wattage or AC input requirements of your e-moto charger. STEP 2: Add the wattage of anything else you want to operate at the same time. STEP 3: Add approximately 20–30% additional capacity for comfortable operating headroom. STEP 4: Compare your result against the generator's continuous/running wattage, not just its advertised peak or starting wattage. Example E-Moto Charger: 1,000W Camping/Track Equipment: 300W Total Load: 1,000W + 300W = 1,300W Add approximately 25% headroom: 1,300W × 1.25 = 1,625W For this setup, we would start looking at generators capable of approximately 1,600W or more of continuous output. Going larger gives you additional capacity for accessories and future equipment. Generator Specs Worth Comparing When shopping for a generator or power station for your e-moto, pay attention to: Continuous / Running Watts
The amount of power the generator can continuously provide. Peak / Starting Watts
Short-duration maximum output. Don't use this number as your primary sizing number for charging. 120V / 240V Output
Determines what types of equipment and chargers can be connected. Inverter Generator
Generally preferred when powering chargers, electronics, and other sensitive equipment. Fuel Type
Gasoline, propane, dual-fuel, or other options can affect convenience, runtime, and emergency preparedness. Runtime
Important for charging large e-moto batteries, especially if a complete charge takes several hours. Outlet Types
Make sure the generator has the appropriate outlets for your equipment. Noise Level
Especially important for camping, events, pits, neighborhoods, and overnight use. Portable Power Station Capacity (Wh/kWh)
For battery power stations, this determines approximately how much stored energy you have available. Not Sure What Size You Need? Send the REV Rides team: 1. Your bike make and model
2. A photo or specifications of your charger
3. How many bikes you want to charge
4. Anything else you want to power at the same time We can help you determine approximately how much generator or power station capacity you should be looking for. The Simple Version Your bike's motor size does NOT determine your generator size. Start with the wattage required by your charger, add anything else you want to operate simultaneously, and then give yourself approximately 20–30% additional continuous output for headroom. For many riders, that makes choosing a generator for the track, camping, off-grid riding, or emergency backup much easier.
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