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Yamaha EF2200iS
The Yamaha EF2200iS is an inverter generator rated 1,800 W running and 2,200 W starting on gasoline. It can run 28 of the 29 household loads we track. The manufacturer rates it at 10.5 hours on a 1.24 gal tank at 25% load, about 2.8 gallons a day at that load.
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Specs
| Type | Inverter (clean power for electronics) |
|---|---|
| Fuel | gasoline[source]Gasoline-only. The US spec page (Yamaha Motor Corporation, USA, labelled '2021 EF2200iS', still in the current power-products lineup) lists the fuel tank in gallons and no other fuel. yamahagenerators.com is behind a store password, so it could not be used. |
| Running watts (gasoline) | 1,800 W[source]Continuous AC Output (Rated): 1800 watts. |
| Starting watts (gasoline) | 2,200 W[source]Peak AC Output (MAX): 2200 watts. |
| Fuel tank | 1.24 gal[source]Fuel Tank Capacity: 1.24 gal. |
| Runtime on a full tank | 10.5 h[source]Continuous Operation at 1/4 Rated Load: 10.5 hrs. No other load points published. at 25% load |
| Noise | 57 dBA[source]Noise Level (1/4 Load - Rated Load): 57 - 65 dBA. 57 dBA is at 1/4 load and 65 dBA at rated load. The page does not state the measuring distance. |
| 240 V outlet | No[source]No 240 V outlet listed. The features page lists a 30-Amp RV outlet (120 V) and Twin Tech parallel capability with a second EF2200iS. The spec page does not give a full outlet list. |
| CO shut-off sensor | Yes[source]Named 'CO Sensor' on the page: 'Engine shuts off if a high level of carbon monoxide is detected.' |
| Weight | 55.2 lb[source]Dry Weight: 55.2 lbs. |
| List price | Not publishedNeither the yamahamotorsports.com product/spec/features pages nor the power-products lineup show an MSRP for the EF2200iS (they only offer 'Get a Quote' or 'Contact a Dealer'). The official store yamahagenerators.com is password-protected (redirects to /password). Retailer prices were not used. Seen 2026-10-19. |
Fuel cost: about $1.14 per kWh at the stated load (0.26 gal/kWh × $4.33/gal, the EIA US average). This applies at the stated load only.
What it can run
"Yes" means the running watts fit within 1,800 W and the startup surge within 2,200 W, and the load runs on 120 V. Unlike a battery, a generator runs as long as it has fuel, so there is no runtime per appliance; see fuel use above.