Firman P12002
Generator. Specs from the manufacturer page (checked ).

The Firman P12002 is a gasoline inverter generator rated at 12,000 running watts and 15,000 starting watts. It has a 760cc engine, electric start, and 120/240-volt outlets, including a 14-50R 120V/240V 50A receptacle.
Key features
- 760cc engine with electric start only and low oil shutoff
- Up to 11.5 hours of run time at 50% load from a 13.3 gallon tank
- Fuel gauge
- CO Alert sensor against carbon monoxide poisoning
- Two 5-20R 120V 20A duplex GFCI outlets
- Two L5-30R 120V 30A twistlock outlets and one L14-30R 120V/240V 30A twistlock outlet
- One 14-50R 120V/240V 50A outlet
- 12V DC power port (8.3A/12V DC/100W) and 81dB at 3/4 load
Specifications
| Running watts | 12000 W |
|---|---|
| Peak / surge | 15000 W |
| Fuel | gasoline |
| Tank | 50.3 L (13.3 gal) |
| Run time at 50 % load | 11.5 h |
| AC output voltage | 120/240 volts |
| Weight | 176.9 kg (390.0 lb) |
| Warranty | 3 years |
From the Firman page. Values the manufacturer does not publish are left out.
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Connection and wiring
Follow the diagrams in the Firman manual. Connecting to a home panel needs a transfer switch or interlock and a licensed electrician.
- Wiring diagram, manual page 2 →
- Wiring diagram, manual page 33 →
- Wiring diagram, manual page 34 →
- Wiring diagram, manual page 35 →
- Wiring diagram, manual page 36 →
Error codes and troubleshooting
We found no error-code table in this manual. Its troubleshooting section is the reference.
FAQ
How long does the Firman P12002 run on a tank?
The maker rates it at 11.5 hours at 50 % load (about 6,000 W) on a 13.3-gal tank. A light load such as a refrigerator and lights runs longer; a full load runs shorter.
Can the Firman P12002 start a sump pump or well pump?
Starting surge matters more than running watts: this unit is rated 15000 W peak. That covers a typical 1/2 HP sump pump (about 2150 W to start). Use the calculator with your exact pump.