Compare Generators Side-by-Side
Select up to 4 generators to compare specs, power output, noise levels, runtime and more. Your compare URL is shareable.
- Firman T08072
- Generac #7715 GP8000E
Quick charts
Each chart uses its own Y-axis scale (so numbers are comparable within a chart).
Running watts
W
Starting watts
W
Noise
dB
Runtime @50%
h
Running watts by fuel
Shows how output changes across gasoline/propane/natural gas (when available).
| Specification | Firman T08072 | Generac #7715 GP8000E |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Tri-Fuel | Gasoline |
| Inverter | No | No |
| Parallel capable | No | No |
| RV ready | Yes | No |
| Running watts | Winner: Winner: 8000 W | Winner: Winner: 8000 W |
| Starting watts | Winner: Winner: 10000 W | Winner: Winner: 10000 W |
| Noise (lower limit) | Winner: Winner: 74 dB | 0 dB |
| Weight | 213 lbs | Winner: Winner: 198 lbs |
| Run time @50% load | Winner: Winner: 12 h | 10 h |
| Run time @25% load | 12 h | 15 h |
| Fuel tank | 8 gal | 7.9 gal |
| Fuel gauge | Yes | Yes |
| Approx. dimensions (L × W × H) | 29.8 x 27.5 x 26.1 | 27.2 x 27 x 26.5 |
| Electrical | ||
| Voltage (AC) | 120/240 | 120/240 |
| Voltage (DC) | Not available | Not available |
| GFCI outlets | Yes | Yes |
| Covered outlets | Yes | Yes |
| Automatic Voltage Regulation | Yes | Yes |
| THD | Not available | Not available |
| Engine | ||
| Engine | 439 cc OHV 4-stroke. | Generac OHV 4-stroke, 420 cc |
| Alternator | Not available | Not available |
| Starting system | Recoil, Electric | Recoil, Electric |
| Warranty | ||
| Warranty | 3 years | 3 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 8000 W | 8000 W |
| Starting watts | 10000 W | 10000 W |
| Running amps (120V) | Not available | Not available |
| Running amps (240V) | Not available | Not available |
| Peak amps (120V) | Not available | Not available |
| Peak amps (240V) | Not available | Not available |
| Run time @50% load | 12 h | 10 h |
| Run time @25% load | Not available | 15 h |
| Natural gas | Not available | Not available |
| Running watts | 5500 W | Not available |
| Starting watts | 6900 W | Not available |
| Running amps (120V) | Not available | Not available |
| Running amps (240V) | Not available | Not available |
| Peak amps (120V) | Not available | Not available |
| Peak amps (240V) | Not available | Not available |
| Run time @50% load | Not available | Not available |
| Run time @25% load | Not available | Not available |
| Propane | Not available | Not available |
| Running watts | 7250 W | Not available |
| Starting watts | 9050 W | Not available |
| Running amps (120V) | Not available | Not available |
| Running amps (240V) | Not available | Not available |
| Peak amps (120V) | Not available | Not available |
| Peak amps (240V) | Not available | Not available |
| Run time @50% load | Not available | Not available |
| Run time @25% load | Not available | Not available |
| Other | ||
| Data center | Not available | Not available |
| Indicators | true | false |
| Compliance | CARB, EPA, ANSI/PGMA G300-2023 | EPA, ANSI/PGMA G300-2023 |
| Security | Not available | Not available |
| Spark arrestor | Yes | Yes |
| Neutral | Bonded to frame. | Bonded to frame |
| UPC | 840876180723 | 696471086225 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 8000 | 8000 |
| Running Watts (Propane) | 7250 | Not available |
| Running Watts (Natural Gas) | 5500 | Not available |
| Starting Watts (Gasoline) | 10000 | 10000 |
| Starting Watts (Propane) | 9050 | Not available |
| Starting Watts (Natural Gas) | 6900 | Not available |
| Runtime @ 50% Load (Gasoline) | 12 | 10 |
| Runtime @ 25% Load (Gasoline) | Not available | 15 |
| AC Outlet Types | 1x Duplex 120V 20A (5-20R) GFCI; 1x 120V 30A (L5-30R); 1x 120/240V 30A (L14-30R); 1x 120/240V 50A (14-50R) | 2x Duplex 120V 20A (5-20R) GFCI1x 120/240V 30A (L14-30R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | 439 cc OHV 4-stroke | Not available |
| Engine Displacement | 439 | 420 |
| Cylinder Sleeve | Cast iron sleeve | Not available |
| Engine Oil Type | Not available | 10W-30 / SAE 30 |
| Runtime & fuel system | ||
| Runtime @ 25% Load (Gasoline) | Not available | 15 |
| Runtime @ 50% Load (Gasoline) | 12 | 10 |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection. | Low oil and overload protection, CO monitoring |
| Low Oil Protection | Yes | Yes |
| Carbon Monoxide Monitoring | Yes | Yes |
| Included equipment | ||
| Mobility Components | Yes | Not available |
| Starting Components | Not available | Oil, battery, and wheel kit |
| Included Accessories | Oil, funnel, tool kit, natural gas hose with NPT adapter, propane hose, battery, and wheel kit. | Oil, battery, and wheel kit |
| Warranty & identification | ||
| Commercial Warranty | 3 | 3 |
| Part Number | Not available | 7715, 7686 |
| Additional specs | ||
| Summary | The Firman T08072 is an 8,000-watt tri-fuel generator built for users who need flexibility across fuel sources and sustained power output. Running on gasoline, propane, or natural gas, this unit delivers 10,000 peak watts on startup, enough to handle simultaneous demands like air compressors, power tools, and household appliances. The tri-fuel capability means users can switch fuels based on availability and cost, a significant advantage for job sites, RV travel, or emergency backup where fuel supply chains vary. On gasoline, the T08072 runs at full 8,000 watts. On propane, output drops to 7,250 watts. On natural gas, it falls to 5,500 watts. This tiered output reflects the energy density of each fuel type and shapes what users can realistically power during extended outages or remote work. The 8-gallon tank delivers 12 hours of runtime at both 25% and 50% load on gasoline, meaning users can operate a moderate load overnight without refueling. For job sites and backup power scenarios, this runtime eliminates mid-shift fuel stops. | The Generac GP8000E is an 8,000-watt gasoline generator built for homeowners and contractors needing whole-house backup power or serious job site output. With 10,000 starting watts, it can handle the initial surge of air conditioners, well pumps, and power tools while running smaller loads continuously. The 7.9-gallon fuel tank delivers 15 hours at 25% load, meaning users can power essential devices through an entire night without refueling. |
- Most PowerfulFirman T080728000W running
- QuietestFirman T0807274 dB
- Longest RuntimeFirman T0807212h at 50% load
Where to buy
Prices can change. We update these automatically.
Firman T08072
Store links
No links yet.
Generac #7715 GP8000E
Store links
No links yet.
Disclosure: Some links may be affiliate links. Specs and comparisons are never hidden.