Model EF2200iSYamaha 1,800W Gas Generator Review
The Yamaha EF2200iS is a portable inverter generator that offers a balance between power and portability, making it ideal for campers, caravanners, adventurers, and outdoor enthusiasts.
At a Glance
- Running Watts1800W
- Starting Watts2200W
- Fuel TypeGasoline
- Runtime (25%)10.5h
- Noise Level57 dB
- Weight55.2 lbs
Where to buy
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Is this the right generator for you?
Here's the quick tradeoff view — what this model does well, and where it may not fit.
Pros
- Inverter technology for clean power suitable for sensitive electronics
- Maximum AC output of 2200 watts and rated AC output of 1800 watts
- Powered by a durable Yamaha MZ80 OHV, air-cooled, single-cylinder, 4-stroke engine
- Smart Throttle for automatic load sensing and improved fuel efficiency
- Quiet operation with noise levels between 57 - 65 dBA
- Lightweight design at 55.2 lbs with a tri-handle for easy transport
- RV Ready with a 30-Amp RV outlet
- Parallel capability with Twin Tech to connect two EF2200iS units for increased power
- CO Sensor for safety, shutting off the engine if high levels of carbon monoxide are detected
- Overload Power Reset for easy restoration of power without shutting down the unit
Cons
- No electric start feature
- Relatively high noise level at 57 decibels
Summary
The Yamaha EF2200iS is a gasoline generator rated for 1,800 running watts with 2,200 starting watts. That combination gives it a clear split between steady output for ongoing loads and extra headroom for brief startup surges.
Because it runs on gasoline, the EF2200iS fits users who want a familiar fuel choice while still getting a compact inverter-style generator design.
Power & Runtime
With 1,800 running watts and 2,200 starting watts, the EF2200iS is built to handle continuous demand while also accommodating momentary spikes when equipment first kicks on. Its 57 dBA noise level supports use in settings where keeping sound down matters, and the inverter output is backed by a 2.5% THD figure, which speaks directly to cleaner power delivery for electronics that benefit from tighter waveform control.
Runtime is listed at 10.5 hours at 25% load, tying endurance to lighter draw scenarios where you are stretching fuel over longer periods. The generator carries a 1.24 gallon fuel tank, which pairs with that 25% load runtime to frame how long you can stay powered before refueling.
Portability
At 55.2 lbs, the EF2200iS stays within a weight range that can be moved between storage and the point of use without treating it like a fixed installation. Its dimensions of 21.9 x 11.8 x 18.5 inches help clarify how it will fit in a vehicle, in a garage corner, or alongside other gear when space is limited.
Features
Starting is handled by a recoil system, keeping operation straightforward and fully manual. Practical monitoring is supported by a fuel gauge and indicators, so you can track basic status and fuel at a glance while it is running.
For use cases that demand regulatory alignment, the EF2200iS lists CARB and EPA compliance. It is also parallel capable, which opens the door to scaling output by linking it with another compatible unit, and it is RV ready for plug-and-play convenience in RV power setups. A spark arrestor is included for added safety considerations in outdoor environments, and AVR is built in to support stable voltage regulation. Yamaha backs the unit with a 3-year warranty.
Recommended Audiences
- RV owners needing RV-ready power
- Users who want to scale output via parallel operation
- Owners of sensitive electronics seeking clean inverter power
- Shoppers who prefer gasoline-powered generators
- Campers and outdoor enthusiasts needing portable power
- Users who need a lightweight, portable power solution
What this generator can power
At a Glance
- Continuous:1,800W(recommended usable: 1,440W)
- Surge:2,200W
- Output:120V only
- Inverter:Yes (clean power for electronics)
Big-item compatibility
Needs 240V output
Needs 240V output
Needs 240V output
Needs 240V output
Exceeds capacity
Example setups
Essentials
- Lights + Wi-Fi + Charging
- Refrigerator
- Furnace Blower
Est. running: 1,000W
Peak surge (single motor): 1,200W
Avoid starting multiple motor loads at the same time.
Essentials + Comfort
- Lights + Wi-Fi + Charging
- Refrigerator
- TV + Entertainment System
- Furnace Blower
Est. running: 1,300W
Peak surge (single motor): 1,200W
Avoid starting multiple motor loads at the same time.
Jobsite / Tools
- Lights + Wi-Fi + Charging
Est. running: 200W
These are estimates using typical wattage assumptions. Real appliances vary. Startup surges can be 2–6× the running wattage for motor-driven loads. 240V loads require a 120/240V generator and proper connection. Use a transfer switch or interlock kit; never backfeed a panel.
About Yamaha
Yamaha is a respected leader in the generator industry, recognized for their innovation, quality, and reliability in portable and backup power solutions.
Warranty
Power by fuel
| Fuel | Running | Starting | Runtime @50% | Runtime @25% |
|---|---|---|---|---|
| Gasoline | 1800W | 2200W | — | 10.5h |
Full Specifications
Power
| Running Watts | 1,800 watts |
|---|---|
| Starting Watts | 2,200 watts |
| Starting Watts (Gasoline) | 2,200 W |
| Running Watts (Gasoline) | 1,800 W |
Engine
| Engine | 79 cc Yamaha MZ80 OHV 4-stroke |
|---|---|
| Engine Type | OHV 4-stroke |
| Engine Displacement | 79 cc |
| Spark Arrestor | Yes |
| Emissions Compliance | CARB, EPA |
Electrical
| Voltage (AC) | 120 |
|---|---|
| Voltage (DC) | 12 |
| Running Amps | 15 A |
| Peak Amps | 18.3 A |
| AC Frequency | 60 hz |
| Current | 15 amps |
| GFCI Outlets | No |
| DC Outlets | 1x 12V 3A (cigarette lighter style) |
| AC Outlets | 1x Duplex 120V 20A (5-20R); 1x 120V 30A (TT-30R) |
| Total Harmonic Distortion (THD) | 2.5 % |
Dimensions
| Dimensions | 21.9 x 11.8 x 18.5 inches |
|---|---|
| Weight | 55.2 lbs |
Other
| Automatic Low Oil Shutdown | Yes |
|---|---|
| Emissions Compliance | CARB, EPA |
| Automatic Voltage Regulation | Yes |
| Automatic Voltage Regulator | Yes |
| Carbon Monoxide Sensor | Yes |
| Commercial Warranty | 3 years |
| Covered Outlets | No |
| Electric Start | No |
| Fuel Gauge | Yes |
| Fuel Tank Capacity | 1.24 gallons |
| Included Accessories | No accessories |
| Indicators | Yes |
| Inverter | Yes |
| Noise Level | 57 dBA |
| Overload Protection | Low oil and overload protection |
| Parallel Capable | Yes |
| Recoil Start | Yes |
| RV Ready | Yes |
| Starter Type | Recoil |
| Starting System | Recoil |
| UPC | 810,856,030,317 |
| Warranty | 3 years |
Core
| Fuel Type | Gasoline |
|---|
Runtime
| Runtime @ 25% | 10.5 hours |
|---|---|
| Runtime @ 25% Load (Gasoline) | 10.5 hours |
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