Firman H08051 Dual Fuel 8000W
Firman H08051 Dual Fuel 8000W is a portable generator from Firman, rated 8,000 running watts with 10,000 starting watts on gasoline (7,250 W on propane), measured at 74 dBA, with 120/240V output.
| Type | portable |
|---|---|
| Fuel | gasoline, propane |
| Running watts (gas / LP for standby) | 8000 W |
|---|---|
| Starting watts (gas) | 10000 W |
| Running watts (propane) | 7250 W |
| Starting watts (propane) | 9050 W |
| Noise level | 74 dBA |
|---|---|
| Runtime at 50% load (gas) | 12 h |
| Fuel tank | 8 gal |
| Output voltage | 120/240V |
|---|
| Start type | electric |
|---|
| Engine displacement | 439 cc |
|---|
| Weight | 212 lb |
|---|
What the numbers mean
- At 8,000 running watts on its best fuel, this unit covers a partial-home setup through a 30 A transfer switch or interlock: refrigerator, furnace, a well or sump pump, and lights, with load management for anything bigger.
- Runs on gasoline, propane — expect lower output on propane (roughly 10%) and natural gas (roughly 20%) than on gasoline; the spec table shows the published per-fuel ratings.
- Runtime: 12 h at 50% load on the 8-gallon tank — roughly 19.2 h at 25% load (estimated) .
- Estimated fuel cost for 24 h at ~50% load: about $51 on gasoline at national average prices (assumptions).
- House hookup: pairs with a 50 A generator inlet ( 14-50 / CS6365) and a transfer switch or interlock installed by an electrician.
Compare the Firman H08051 Dual Fuel 8000W
- Firman H08051 Dual Fuel 8000W vs Champion 7000W Dual Fuel (100155)
- Firman H08051 Dual Fuel 8000W vs Champion 7500W with 50A Outlet (100813)
- Firman H08051 Dual Fuel 8000W vs Champion 7500W Dual Fuel (100891)
- Firman H08051 Dual Fuel 8000W vs Champion 7500W Dual Fuel with CO Shield (201281)
- Firman H08051 Dual Fuel 8000W vs DuroMax XP12000EH Dual Fuel
- Firman H08051 Dual Fuel 8000W vs DuroMax XP13000EH Dual Fuel
- Firman H08051 Dual Fuel 8000W vs DuroMax XP13000HX Dual Fuel with CO Alert
- Firman H08051 Dual Fuel 8000W vs DuroMax XP15000HX Dual Fuel
Similar generators
- Firman T08071 Tri-Fuel 8000W ( 8,000 W running)
- Generac GP8000E COsense ( 8,000 W running)
- WEN DF1100T Dual Fuel 11000W ( 8,300 W running)
- Champion 7500W with 50A Outlet (100813) ( 7,500 W running)
- Champion 7500W Dual Fuel (100891) ( 7,500 W running)
- Champion 7500W Dual Fuel with CO Shield (201281) ( 7,500 W running)
Frequently asked questions
What can the Firman H08051 Dual Fuel 8000W run during an outage?
With 8,000 running watts on its best fuel, the Firman H08051 Dual Fuel 8000W covers a partial-home setup through a 30 A transfer switch or interlock: refrigerator, furnace, a well or sump pump, and lights, with load management for anything bigger. Add up your actual loads with a sizing worksheet — the bands here are rough guidance, not a load calculation.
How long does the Firman H08051 Dual Fuel 8000W run on a tank of gas?
About 12 hours at 50% load on its 8-gallon tank, per the manufacturer's rating. At a lighter 25% load, figure roughly 19.2 hours (estimated — fuel burn does not scale linearly with load).
What does the Firman H08051 Dual Fuel 8000W cost to run for a day?
Roughly $51 for 24 hours of continuous operation at about 50% load on gasoline, at national average fuel prices. The assumptions behind this estimate are documented on the methodology page; your fuel price and load change the figure.
What inlet does the Firman H08051 Dual Fuel 8000W need to power a house?
A 50 A generator inlet (a 14-50 or CS6365 connection) wired to a transfer switch or interlock kit — an electrician's job that normally requires a permit. Never backfeed through a dryer or wall outlet.
Sources
- www.amazon.com (retrieved 2026-07-23)
- firmanpowerequipment.com (retrieved 2026-07-24)