Top 70+ Most Fuel-Efficient Power Generators
When comparing power generators, specific fuel efficiency is one of the sometimes neglected features, often disguised in runtime at certain power levels, usually @25%, @50%, or @100% of nominal power with the fuel tank capacity being provided, as well.
We are bringing You the list of the most fuel-efficient power generators with their efficiency provided in gallons and liters per kWh at a certain power level with other features provided as well.
Updated: December 14, 2022.
Power Generators Features and Specifications
When looking for a new power generator, there are several important things to look for, including:
- Running and Starting power,
- fuel type, usually gas (gasoline, petrol), propane gas (LPG - Liquid Petroleum Gas), natural gas, diesel,
- list of receptacles,
- is the generator parallel ready or not,
- is generator inverter generator or not,
- fuel tank capacity,
- runtime on a single fuel tank,
- Carbon Monoxide sensors and other safety features like low-oil shut-off, power ready, overload protection, and similar,
- noise levels,
- THD levels, etc.
Fuel efficiency is a very important feature, and practically all manufacturers offer this information in the form of runtime at specific power loads and the fuel tank capacity, but they rarely state the specific fuel consumption.
Specific fuel consumption can be calculated using the following formula:
Specific Fuel Consumption = Tank Capacity (gal) / (P (kW) * T(h))
and is given in gal/kWh or liters/kWh.
For example, one of the most efficient power generators is WEN 56380i Portable Inverter Generator (Amazon link, link opens in the new window), which features 3400 Running Watts, 3800 Starting Watts, and 2.2 gallons (~8.32 l) fuel tank.
It can operate 8.5 hours @50% (1700W) of nominal power.
Thus, its specific fuel consumption is:
2.2 gallons / (1.7 kW * 8.5h) = 0.152 gal/kWh = 0.575 l/kWh
when the unit operates at 50% load (1700W).
However, there are several issues with calculating specific fuel consumption in this way:
- Internal combustion engines are less efficient when operating at lower power levels. Thus, when comparing two power generators, compare them for the same load percentage (25%, 50%, 100%),
- we didn't calculate specific consumption of propane gas or natural gas, just gasoline,
- 2-stroke internal combustion engines are less fuel-efficient than 4-stroke engines, but they are also simpler and easier to maintain.
- Most power generators support the use of gasoline mixed with up to 10% ethanol, but it is often unclear if the information about power generators is given for gasoline without ethanol or with 5% or 10% ethanol,
- in real life power generators don't provide just 25%, or 50% or 100% of their running watts - their loads change, often constantly. Inverter power generators with Eco modes and idle power control can be more efficient than non-inverter units when the load is from time to time 0 (zero) watts or very low.
Depending on personal needs and requirements, other features are sometimes more important than specific fuel consumption, like THD levels (if You have to power sensitive electronics), noise levels (if You have to operate a power generator in a camp or urban environment), type and number of receptacles, fuel types (in emergencies, gasoline can be scarce, but the propane gas (LPG) can be easily stored for longer periods of time), etc.
Thus, specific fuel consumption should be only one of the features when looking for a new power generator.
How Much Gas and Propane Does A Generator Use
Dual-fuel power generators can use both gas (gasoline) and propane (propane gas, LPG), often allowing the user to switch from one fuel to another fuel "on the fly."
While having dual-fuel generators offer many benefits, one must be aware that in order to provide the same power levels, generators have to burn more propane.
But propane is much cleaner fuel and less taxing for the engine and oil, improving the lifetime of the generator and increasing the oil change interval. Also, propane is much easier to store in the long run.
Power Generators Fuel Efficiency Comparison Chart
The following comparison table lists 70+ power generators with their most important features and specifications, specific fuel consumption included (power generators are ordered alphabetically):
| Model |
Running Watts Starting Watts |
Runtime Noise |
Fuel Efficiency Fuel Tank |
Receptacles Review |
| A-iPower SUA2000iV | 1600W 2000W |
4h @100% |
0.171 gal/kWh @100% 0.646 l/kWh @100% 0.196 gal/kWh @50% 0.741 l/kWh @50% 1.1 gal (~4.16 l) |
AC: 120V 20A 5-20R, 120V 30A L5-30R; DC: 12V - |
| A-iPower SUA2300iV | 1800W 2300W |
6.5h @50% 52 dB @25% 58 dB @50% |
0.188 gal/kWh @50% 0.71 l/kWh @50% 1.1 gal (~4.16 l) |
AC: 120V 20A 5-20R, 120V 30A L5-30R; DC: 12V 8.3A, USB 5V - |
| A-iPower SUA12000E | 9000W 12000W |
9h @50% 78 dB |
0.173 gal/kWh @50% 0.653 l/kWh @50% 7 gal (~26.5 l) |
AC: 120/240V 50A (14-50R), 120/240V 30A (L14-30R), 4x GFCI 120V 20A (5-20R) - |
| All Power America APGG12000GLC |
9000W 7250W |
10h @50% Gas 76 dB |
0.177 gal/kWh @50% 0.672 l/kWh @50% 8 gal (~30.2 l) |
AC: 2x 120V 20A 5-20R, L5-30R 30A 120V, 14-50R 50A-120/240V; DC: 12V 8.3A - |
| Briggs & Stratton P2200 | 1700W 2200W |
8h @25% 59 dB @25% |
0.294 gal/kWh @25% 1.11 l/kWh @25% 1 gal (~3.8 l) |
AC: 20A 120V Duplex; DC: 12V, USB Adapter |
| Briggs & Stratton P3000 | 2600W 3000W |
10h @25% 58 dB @25% |
0.230 gal/kWh @25% 0.87 l/kWh @25% 1.5 gal (~5.7 l) |
AC: 20A 120V Quad, 120V 30A L5-30R; DC: 12V, 1x USB - |
| Buffalo Tools Sportsman GEN1000i | 800W 1000W |
6.3h @50% 56 dB @23 ft |
0.438 gal/kWh @50% 1.65 l/kWh @50% 1.1 gal (~4.16 l) |
AC: 120V 20A 5-20R; DC: 12V 4A - |
| CAT RP12000E |
12000 W |
11.7 hours @50% | 0.188 gal/kWh @50% 0.711 l/kWh @50% 13.2 gal (49.9 l) |
AC: 120/240V 50A (14-50R), 120/240V 30A (L14-30R), 2x 120V 30A (L5-30R), 2x GFCI 120V 20A Duplex (5-20R); DC: 12V 8.3 Amps - |
| Champion 73536i | 1700W 2000W |
9.5h @25% 53 dB @25% |
0.248 gal/kWh @25% 0.936 l/kWh @25% 1 gal (~3.8 l) |
AC: 20A 120V Duplex; DC: 12V |
| Champion 75531i | 2800W 3100W |
8h @25% 58 dB |
0.286 gal/kWh @25% 1.1 l/kWh @25% 1.6 gal (~6 l) |
AC: 120V 30A TT-30R, 2x 120V 20A 5-20R; DC: 12V, dual USB adapter - |
| Champion 76533 | 3800W 4750W 3420W |
9h @50% Gas 10.5h @50% 20 lbs Propane Tank 68 dB @23 feet |
0.2 gal/kWh @50% 0.75 l/kWh @50% 3.4 gal (~12.9 l) |
AC: 120V 30A TT-30R, 120V 30A L5-30R, 2x 120V 20A 5-20R - |
| Champion 100111 | 12000W 15000W |
9h @50% 78 dB @23 feet |
0.202 gal/kWh @50% 0.763 l/kWh @50% 10.9 gal (~41.2 l) |
AC: 120/240V 50A 14-50R, 120/240V 30A L14-30R, 120V 30A L5-30R, 2x GFCI 120V 20A Duplex 5-20R - |
| Champion 100161 | 7500W 9375W |
8 hours @50% 74 dB, 23 ft |
0.2 gal/kWh @50% 0.756 l/kWh @50% 6 gal (~22.7 l) |
AC: 120/240V 50A (14-50R), 120/240V 30A (L14-30R), 120V 30A (TT-30R), 2x GFCI 120V 20A Duplex (5-20R) - |
| Champion 100165 |
7500W 6750W |
8h @50% Gas |
0.2 gal/kWh @50% 0.756 l/kWh @50% 6 gal (~22.7 l) |
AC: 120V 30A L5-30R, 120/240V 30A L14-30R, 2x 120V 20A GFCI 5-20R Duplex - |
| Champion 100231 |
5500W 5000W |
9h @50% Gas 6.5h @50% 20 lbs Propane Tank 74 dB @23 feet |
0.242 gal/kWh @50% 0.916 l/kWh 6 gal (~22.7 l) |
AC: 120/240V 30A L14-30R, 2x GFCI 120V 20A Duplex 5-20R - |
| Champion 100263 |
3100W 2790W |
7.5h @25% gas 14.5h @25% 20 lbs Propane Tank 59 dB |
0.275 gal/kWh @25% 1.04 l/kWh @25% 1.6 gal (~6 l) |
AC: 120V 30A TT-30R, 2x 120V 20A 5-20R; DC: 12V, dual USB adapter - |
| Champion 100297 |
8000W 7250W |
8h @50% Gas |
0.190 gal/kWh @50% 0.72 l/kWh @50% 6.1 gal (~23.1 l) |
AC: 120V 30A L5-30R, 120/240V 30A L14-30R, 2x 120V 20A GFCI 5-20R Duplex - |
| Champion 100416 |
8000W 7200W 7000W |
12.5h @50% Gas 5h @50% 20 lbs Propane Tank 74 dB @23 ft |
0.170 gal/kWh @50% 0.643 l/kWh @50% 8.5 gal (~32.1 l) |
AC: 120/240V 30A L14-30R, 120V 30A L5-30R, 2x GFCI 120V 20A Duplex 5-20R - |
| Champion 100519 | 5000W 6250W |
13.5h @25% 69 dB @23feet |
0.249 gal/kWh @25% 0.941 l/kWh @25% 4.2 gal (~15.9 l) |
AC: 120/240V 30A L14-30R, 2x GFCI 120V 20A Duplex 5-20R; DC: 12V Automotive - |
| Champion 100574 |
3500W 3150W |
14.5h @25% Gas |
0.228 gal/kWh @25% 0.864 l/kWh @25% 2.9 gal (~11 l) |
AC: 120V 30A TT-30R, 120V 20A Duplex 5-20R; DC: 12V Automotive - |
| Champion 100692 | 1700W 2000W |
11.5h @25% 53 dB @25% |
0.225 gal/kWh @25% 0.851 l/kWh @25% 1.1 gal (~4.16 l) |
AC: 20A 120V Duplex; DC: 12V - |
| Champion 200915 | 1200W 1500W |
10h @50% 65 dB @23 feet |
0.25 gal/kWh @50% 0.945 l/kWh @50% 1.5 gal (~5.7 l) |
AC: 120V 5-20R Duplex - |
| Champion 200988 |
3500W 3150W |
14h @25% Gas 12h @25% 20 lbs Propane Tank 61 dB @23 feet |
0.188 gal/kWh @25% 0.71 l/kWh @25% 2.3 gal (~8.7 l) |
AC: 120V 30A TT-30R, 2x 120V 20A 5-20R; DC: 12V DC Automotive - |
| Champion 201004 | 7500W 9375W |
8h @50% Gas 74 dB @23 feet |
0.19 gal/kWh @50% 0.72 l/kWh @50% 5.7 gal (~21.6 l) |
AC: 120/240 50A 14-50R, 120/240V 30A L14-30R, 2x GFCI 120V 20A Duplex 5-20R - |
| Coleman CM04101 | 900W 1000W |
8h @50% 58 dB @23 ft |
0.277 gal/kWh @50% 1.05 l/kWh @50% 1.0 gal (~3.78 l) |
AC: 120V 20A 5-20R; DC: 12V 10A - |
| DuroMax XP4850EH |
3850W 3658W |
~10.4h @50% Gas ~9h @50% 20 lbs Propane Tank <69 dB |
0.198 gal/kWh @50% 0.748 l/kWh @50% 3.96 gal (~15 l) |
AC: 120/240V 30A L14-30R, 120V 20A Duplex GFCI; DC: 12V 8.3A Battery - |
| DuroMax XP8500EH |
7000W 6650W |
11.5h @50% Gas 8h @50% 40 lbs Propane Tank 72 dB |
0.196 gal/kWh @50% 0.742 l/kWh @50% 7.9 gal (~29.9 l) |
AC: 2x 120V 20A 5-20R GFCI Duplex, 120/240V 30A L14-30R; DC: 12V 8A Battery, 2x USB 5.0V (2.1A, 1A) - |
| DuroMax XP12000EH |
9500W 9025W |
8.83h @50% Gas 7.2h @50% 40 lbs Propane Tank <74 dB |
0.198 gal/kWh @50% 0.748 l/kWh @50% 8.3 gal (~31.4 l) |
AC: 2x 120V 20A 5-20R, 120V 30A L5-30R, 120/240V 30A L14-30R, 120/240V 50A 14-50R; DC: 12V 8.3A - |
| DuroMax XP13000HXT |
10500W 9500W 8500W |
17h @25%, 8.5h @50% Gas 74 dB |
0.186 gal/kWh @50% 0.704 l/kWh @50% 8.3 gal (~31.4 l) |
AC: 2x AC 120V GFCI 5-20R Double, 120V 30A L5-30R, 120/240V 30A L14-30R, 120/240V 50A 14-50R - |
| Firman H08051 |
8000W 7250W |
12h @50% Gas 12h @50% 8 gal Propane Tank 74 dB |
0.166 gal/kWh @50% 0.63 l/kWh @50% 8.0 gal (~30.3 l) |
AC: 2x 5-20R 20A 120V GFCI, 14-50R 50A 120/240V, L14-30R 30A 120V/240V, L5-30R 30A 120V - |
| Firman T07571 |
7500W 6750W 5500W |
12h @50% Gas 74 dB |
0.177 gal/kWh @50% 0.673 l/kWh @50% 8.0 gal (~30.3 l) |
AC: GFCI 120V 20A 5-20R Duplex, 120V 30A L5-30R, 120V/240V 30A L14-30R, 120V/240V 50A 14-50R - |
| Firman W03083 | 3000W 3300W |
9h @25% 58 dB |
0.237 gal/kWh @25% 0.9 l/kWh @25% 1.8 gal (~6.8 l) |
AC: 120V 20A Duplex 5-20R, 120V 30A TT-30R; DC: 12V 8.3A, USB 5V/2.1A port - |
| Ford FG11050PBE |
9000W 8100W |
10h @50% Gas - |
0.146 gal/kWh @50% 0.554 l/kWh @50% 6.6 gal (~25.0 l) |
AC: 2x 5-20R 20A 120V GFCI Duplex, 14-50R 50A-120/240V, L5-30R 30A 120V - |
| Generac 7117 GP2200i | 1700W 2200W |
10.75h @25% 7h @50% ? |
0.262 gal/kWh @25% 0.993 l/kWh @25% 0.202 gal/kWh @50% 0.762 l/kWh @50% 1.2 gal (~4.54 l) |
AC: 20A 120V Duplex; DC: 12V, USB 5V/1.5A - |
| Generac 7127 iQ3500 | 3000W 3500W |
8.9h @50% 14.1 @25% 45* dB |
0.195 gal/kWh @50% 0.736 l/kWh @50% 0.246 gal/kWh @25% 0.93 l/kWh @25% 2.6 gal (~9.23 l) |
AC: 120V 20A Duplex 5-20R, 120V 30A L5-30R; DC: two USB ports (5V/2.1A, 5V/1A) |
| Generac 7129 GP3000i | 2300W 3000W |
4.5h @50% 5.8h @25% ? |
0.204 gal/kWh @50% 0.774 l/kWh @50% 0.318 gal/kWh @25% 1.2 l/kWh @25% 1.06 gal (~4 l) |
AC: 120V 20A Duplex, 120V 30A L5-30R; DC: two USB ports (5V/2.1A, 5V/1A) - |
| Generac 7676 GP8000E | 8000W 10000W |
11h @50% Gas - |
0.179 gal/kWh @50% 0.678 l/kWh @50% 7.9 gal (~29.9 l) |
AC: 2x 5-20R 20A 120V GFCI Duplex, L14-30R 30A 120V/240V; DC: 12V - |
| Generac 76711 GP1200i | 1000W 1200W |
5.5h @50% - |
0.291 gal/kWh @50% 1.1 l/kWh @50% 0.8 gal (~3.03 l) |
AC: 2x 120V 20A 5-20R; DC: 5V USB (1.0A, 2.1A) - |
| Generac GP3300i | 2500W 3300W |
4.5h @50% 7h @25% ? |
0.188 gal/kWh @50% 0.712 l/kWh 0.242 gal/kWh @25% 0.916 l/kWh @25% 1.06 gal (4 l) |
AC: 120V 20A Duplex, 120V 30A L5-30R; DC: two USB ports (5V/2.1A, 5V/1A) - |
| Honda EB2800i | 2500W 2800W |
5.2h @100% 11.9h @25% 67 dB @100% 62 dB @25% |
0.161 gal/kWh @100% 0.61 l/kWh @100% 0.282 gal/kWh @25% 1.07 l/kWh @25% 2.1 gal (~8 l) |
AC: 2x 120V 5-20R Duplex - |
| Honda EB5000 | 4500W 5000W 7000W (10s max.) |
7.1h @100% 10.5h @50% 65 dB @100% 63 dB @50% |
0.194 gal/kWh @100% 0.733 l/kWh @100% 0.262 gal/kWh @50% 1.0 l/kWh @50% 6.2 gal (~23.5 l) |
AC: 2x 20A 120V GFCI Duplex, 30A 120V L5-30R, 30A 120/240V L14-30R - |
| Honda EB6500 | 5500W 6500W 7000W (10s max.) |
6.4h @100% 9.8h @50% 67 dB @100% 64 dB @50% |
0.176 gal/kWh @100% 0.67 l/kWh @100% 0.23 gal/kWh @50% 0.87 l/kWh @50% 6.2 gal (~23.5 l) |
AC: 2x 20A 120V GFCI Duplex, 30A 120V L5-30R, 30A 120/240V L14-30R - |
| Honda EB10000 | 9000W 10000W |
5.4h @100% 7.9h @50% 71 dB @50% 73 dB @100% |
0.168 gal/kWh @100% 0.637 l/kWh @100% 0.230 gal/kWh @50% 0.871 l/kWh @50% 8.19 gal (~31 l) |
AC: 2x 20A 5-20R 120V GFCI Duplex, L5-30R 30A 120V, L14-30R 30A 120V/240V, 14-50R 50A 120/240V - |
| Honda EG4000 | 3500W 4000W |
10.1h @100% 14.8h @50% 67 dB @100% 66 dB @50% |
0.178 gal/kWh @100% 0.673 l/kWh @100% 0.243 gal/kWh @50% 0.92 l/kWh @50% 6.3 gal (~23.8 l) |
AC: 2x 20A 120V GFCI Duplex, 30A 120V L5-30R, 30A 120/240V L14-30R - |
| Honda EM6500SX | 5500W 6500W 7000W (10s max.) |
6.4h @100% 9.8h @50% 66 dB @100% 64 dB @50% |
0.176 gal/kWh @100% 0.67 l/kWh @100% 0.23 gal/kWh @50% 0.87 l/kWh @50% 6.2 gal (~23.5 l) |
AC: 2x 20A 120V GFCI Duplex, 30A 120V L5-30R, 30A 120/240V L14-30R; DC: 12V (8.3 A, 100W) - |
| Honda EU1000i (EU1000T1AG) | 900W 1000W |
3.0h @100% 6.8h @25% 50 dB @100% 42 dB @25% |
0.222 gal/kWh @100% 0.84 l/kWh @100% 0.392 gal/kWh @25% 1.48 l/kWh @25% 0.6 gal (~2.27 l) |
AC: 2x 120V 20A 5-20R - |
| Honda EU2200i | 1800W 2200W |
3.2h @100% 8.1h @25% 48 dB @25% 57 dB @100% |
0.165 gal/kWh @100% 0.623 l/kWh @100% 0.261 gal/kWh @25% 0.985 l/kWh @25% 0.95 gal (~3.6 l) |
AC: 20A 120V Duplex; DC: 12V 100W (8.3 Amps) |
| Honda EU3000IS | 2800W 3000W |
20h @25% 50 dB @25% |
0.242 gal/kWh @25% 0.918 l/kWh @25% 3.4 gal (~12.9 l) |
AC: 120V 20A Duplex, 120V 30A L5-30R - |
| Honda EU7000iS | 5500W 7000W |
6.4h @100% 16h @25% 52 dB @25% 58 dB @100% |
0.145 gal/kWh @100% 0.548 l/kWh @100% 0.232 gal/kWh @25% 0.88 l/kWh @25% 5.1 gal (~19.3 gal) |
AC: 2x 20A 120V GFCI Duplex, 30A 120V L5-30R, 30A 120/240V L14-30R - |
| Powermate PM1200i | 1000W 1200W |
7h @25% - |
0.457 gal/kWh @25% 1.728 l/kWh @25% 0.8 gal (~3.03 l) |
AC: 2x 120V 20A 5-20R - |
| PowerSmart PS50A | 900W 1000W |
5h @50% 49 dB |
0.488 gal/kWh @50% 1.848 l/kWh @50% 1.1 gal (~4.16 l) |
AC: 120V 20A 5-20R - |
| Pulsar PG1202S | 900W 1200W |
5h @50% - |
0.488 gal/kWh @50% 1.848 l/kWh @50% 1.1 gal (~4.16 l) |
AC: 2x 120V 20A 5-20R; DC: 12V 8A - |
| Pulsar PG10000B16 |
8000W 7000W |
12h @50% Gas 74 dB |
0.137 gal/kWh @50% 0.52 l/kWh @50% 6.6 gal (~25 l) |
AC: 2x 120V 20A 5-20R Duplex, 120/240V 30A (L14-30R), 120/240V 50A (14-50R); DC: 12V 8.3A - |
| Ryobi RYi1000 | 900W 1000W |
8h @50% 65 dB |
0.166 gal/kwh @50% 0.63 l/kWh @50% 0.6 gal (~2.27 l) |
AC: 120V 15A 5-15R; DC: 12V 7.5A - |
| TogoPower GG1000 | 800W 1000W |
6h @50% ? |
0.437 gal/kWh @50% 1.65 l/kWh @50% 1.05 gal (~4 l) |
AC: 120V 20A 5-20R - |
| WEN 56200i | 1600W 2000W |
9.4h @25% 51 dB @25% |
0.266 gal/kWh @25% 1.0 l/kWh @25% 1 gal (~3.8 l) |
AC: 20A 120V Duplex; DC: 12V (8.3 Amps), USB 5V - |
| WEN 56225i | 1800W 2250W |
6h @50% 53 dB @25% |
0.185 gal/kWh @50% 0.7 l/kWh @50% 1 gal (~3.8 l) |
AC: 20A 120V Duplex; DC: 2x USB 5V |
| WEN 56235i | 1900W 2350W |
10.5h @25% 51 dB @25% |
0.20 gal/kWh @25% 0.758 l/kWh @25% 1 gal (~3.8 l) |
AC: 15A 120V NEMA 5-20R Duplex; DC: 12V, USB 5V (2.1A, 1A) - |
| WEN 56380i | 3400W 3800W |
8.5h @50% 57 dB |
0.152 gal/kWh @50% 0.575 l/kWh @50% 2.2 gal (~8.32 l) |
AC: 2x 120V 15A 5-20R, 120V 30A TT-30R; DC: 12V, 5V USB - |
| WEN DF1100T |
8300W 7500W |
8.5h @50% Gas 3h @50% 20lbs Propane Tank - |
0.187 gal/kWh @50% 0.707 l/kWh @50% 6.6 gal (~25 l) |
AC: 4x 120V GFCI 5-20R, 120V 30A L5-30R, 120V/240V 50A 14-50R; DC: 12V 8A - |
| Westinghouse iGen2200 | 1800W 2200W |
12h @25% 52 dB @25% |
0.222 gal/kWh @25% 0.84 l/kWh @25% 1.2 gal (~4.54 l) |
AC: 20A 120V Duplex; 2x USB 5V - |
| Westinghouse iGen2600 | 2200W 2600W |
10h @25% 52 dB @25% |
0.182 gal/kWh @25% 0.687 l/kWh @25% 1.0 gal (~3.8 l) |
AC: 20A 120V Duplex; DC: 12V, 2x USB 5V |
| Westinghouse iGen4500 | 3700W 4500W |
18h @25% 52 dB @25% |
0.204 gal/kWh @25% 0.77 l/kWh @25% 3.4 gal (~12.9 l) |
AC: 120V 20A 5-20R Duplex, 120V 30A TT-30R; 2x USB 5.0V (2.1, 1.0 A) |
| Westinghouse WGen3600DF |
3600W 3240W |
18h @25%, 13.5h @50% Gas 10.5h @50% 20 lbs Propane Tank 68 dB |
0.167 gal/kWh @50% 0.622 l/kWh @50% 0.247 gal/kWh @25% 0.933 l/kWh @25% 4 gal (~15.1 l) |
AC: 120V Duplex 5-20R, 120V 30A TT-30R, 120V 30A L5-30R - |
| Westinghouse WGen9500DF |
9500W 8500W |
17.5h @25% Gas 12h @50% Gas 7h @50% 20(?) lbs Propane Tank 74 dB |
0.158 gal/kWh @25% 0.60 l/kWh @25% 0.122 gal/kWh @50% 0.46 l/kWh @50% 6.6 gal (~25 l) |
AC: 2x 120V 5–20R GFCI Duplex, 120/240V 30A L14-30R, 120/240V 50A 14–50R; DC: 12V - |
| Westinghouse WH2200iXLT | 1800W 2200W |
13h @25% 52 dB @25% |
0.222 gal/kWh @25% 0.84 l/kWh @25% 1.3 gal (~4.9 l) |
AC: 20A 120V Duplex; DC: 12V - |
| Yamaha EF1000iS | 900W 1000W |
11.9h @25% 47 dB |
0.246 gal/kWh @25% 0.932 l/kWh @25% 0.66 gal (~2.5 l) |
AC: 2x 120V 15A 5-15R; DC: 12V 8A |
| Yamaha EF2000iSv2 | 1600W 2000W |
10.5h @25% 51.5 dB @25% |
0.262 gal/kWh @25% 1.0 l/kWh @25% 1.1 gal (~ 4.16 l) |
AC: 120V Duplex; DC: 12V 8A - |
| Yamaha EF2400iSHC | 2000W 2400W |
8.6h @25% 53 dB @25% |
0.37 gal/kWh @25% 1.4 l/kWh @25% 1.59 gal (6.0 l) |
AC: 120V Duplex; DC: 12V 8A - |
Note: Amazon affiliate links (the 'Model' column) open in the new windows, feel free to check them for the most up-to-date offers and prices. Also, we have really tried to verify every single bit of information in this chart and article (and in the end - our website), but things change over time without prior notice.
Of course, there are many other power generators on the market as well.
As one can see, specific fuel efficiency ranges depending on the load percentage, but the best units feature fuel consumption less than 0.2 gal/kWh (~0.76 l/kWh) almost regardless of their load.
But, such units often come with a very nice price tag, or they can use only gasoline and similar.
Again, when looking for a new power generator, specific fuel consumption is an important feature; just be sure to check other features as well, according to your own needs and preferences.
Note: when your new power generator arrives, be sure to thoroughly read the documentation that came with the unit in order to get accustomed to your new unit. And whatever You do, stay safe!
How Long Will A Generator Run On 5 Gallons Of Gas
Another way of comparing power generators is to calculate how long a generator will run on a certain amount of fuel while providing a certain amount of power.
Obviously, the most fuel-efficient units will run the longest while providing the most electric power.
As an example, here is the short list of our top fuel-efficient power generators and their 5-gallons (~18.93 liters) runtime - the list is ordered alphabetically.
Ford FG11050PBE Dual Fuel Portable Generator
Features: 9000 Running Watts, 11050 Starting Watts, 6.6 gallons (~25 liters) tank, 10h @50% (4500 Watts).
Consumption = 6.6 gallons / (4.5 kW * 10h) = 0.146 gal/kWh = 0.555 l/kWh
T(5 gallons) = 10h * [5 gallons / 6.6 gallons] = 7.57h @4.5kW
For the most up-to-date offers and prices, feel free to check the Ford FG11050PBE Dual Fuel Portable Generator Amazon link (the link opens in the new window).
Honda EB2800i Portable Inverter Generator
Features: 2500 Running Watts, 2800 Starting Watts, 2.1 gallons (~8 liters) tank, 5.2h @100% (2500W).
Consumption = 2.1 gallons / (2.5kW * 5.2h) = 0.162 gallons/kWh = 0.611 liters/kWh @2500W
T(5 gallons) = 5.2h *[5 gallons / 2.1 gallons] = 12.3h @2500W
For the most up-to-date offers and prices, feel free to check the Honda EB2800i Portable Inverter Generator Amazon link (the link opens in the new window).
Pulsar PG10000B16 Portable Dual Fuel Generator
Features: 8000 Running Watts, 10000 Starting Watts, 6.6 gallons (~25 liters) tank, 12h @50% (4000 Watts).
Consumption = 6.6 gallons / (4kW * 12h) = 0.137 gallons/kWh = 0.52 liters/kWh @4000 Watts
T(5 gallons) = 12h * [5 gallons / 6.6 gallons] = 9.1h @4000W
For the most up-to-date offers and prices, feel free to check the Pulsar PG10000B16 Portable Dual Fuel Generator Amazon link (the link opens in the new window).
WEN 56380i Portable Inverter Generator
Features: 3400 Running Watts, 3800 Starting Watts, 2.2 gallons (~8.32 liters) tank, 8.5h @50% (1700 Watts).
Consumption = 2.2 gallons / (1.7 kW * 8.5h) = 0.152 gal/kWh = 0.576 l/kWh @1700 Watts
T(5 gallons) = 8.5h * [5 gallons / 2.2 gallons] = 19.3h @1700W
As one can see, WEN 56380i portable inverter power generator can theoretically operate up to 32.9 hours using 5 gallons of fuel and producing 1700 Watts of power.
For the most up-to-date offers and prices, feel free to check the WEN 56380i Portable Inverter Generator Amazon link (the link opens in the new window).
Westinghouse WGEN3600DF Dual Fuel Portable Power Generator
Features: 3600 Running Watts, 4650 Starting Watts, 4 gallons (~15.1 liters) tank, 13.5h @50% (1800 Watts).
Consumption = 4 gallons / (1.8 kW * 13.5h) = 0.164 gal/kWh = 0.623 liters/kWh @1800 Watts
T(5 gallons) = 13.5h * [5 gallons / 4 gallons] = 16.8h @1800W
For the most up-to-date offers and prices, feel free to check the Westinghouse WGEN3600DF Dual Fuel Portable Power Generator Amazon link (the link opens in the new window).
Long Story Short: Fuel efficiency is a very important feature of any power generator, but not the only one.
When looking for a new power generator, You should also check power output levels, runtime, fuel tank size, fuel types, power outlets/receptacles, safety features, noise levels, dimensions, weight, transport options, etc.
Obviously, there is no ideal power generator that fits the needs of every user perfectly. But, with so many models on the market, we are sure that any user can easily find "the next best thing."
