Firman P08008 vs Generac #7715 GP8000E

Comparison Overview

Key takeaways

• Both deliver 8000 running watts and 10000 starting watts on gasoline.
• Generac #7715 GP8000E runs 15 hours at 25% load, 10 hours at 50%.
• Firman P08008 is rated 12 hours runtime at 50% load.
• Generac weighs 198 lb, Firman weighs 208 lb for similar power output.
• Firman lists 74 dB noise level, Generac noise level is not provided here.
• Both include a 3 year warranty and are non inverter generators.

Best use cases

Choose the Firman P08008 if you want a straightforward, high output conventional generator and you care about having a published noise number to set expectations. At 74 dB, it is not “quiet,” but it gives you a realistic idea of what you are signing up for in a driveway or on a job site. With 8000 running watts and 10000 starting watts, it can handle bigger startup surges from well pumps, sump pumps, or some larger power tools. It is also a reasonable fit for occasional home backup where you run heavier loads in shorter blocks, since it is rated for 12 hours at 50% load. The tradeoff is weight at 208 lb, plus it is not an inverter model, so it is better for tools and appliances than for sensitive electronics without extra precautions.

Choose the Generac #7715 GP8000E if your priority is longer run time between refuels and slightly easier moving around. It is rated for 15 hours at 25% load and 10 hours at 50% load, which can be a real advantage for overnight essentials like a refrigerator, some lights, and a router, especially if you are trying to avoid frequent refueling. It is also lighter at 198 lb, which helps if you are rolling it out of a garage or repositioning it during a storm. The main tradeoff is that the noise level is not provided here, so if sound is a deciding factor for neighbors, camping, or tighter job sites, you may need to verify that spec elsewhere before committing.

For RV use and quiet campgrounds, neither is an ideal match because both are non inverter, open frame style units, but for home backup and job site power, both are in the right class.

Verdict & recommendation

If your priority is longer, clearly stated runtime at lighter loads, the Generac #7715 GP8000E is the safer pick on paper, with 15 hours at 25% load and 10 hours at 50% load, plus a slightly lower 198 lb weight. If your priority is having a published noise figure and you are comfortable with a bit more heft, the Firman P08008 gives you the same 8000 running watts and 10000 starting watts with a stated 74 dB rating and 12 hours at 50% load.

Because both are gasoline, non inverter generators with identical wattage and the same 3 year warranty, the decision usually comes down to how you expect to run it: longer, lighter overnight loads favor the Generac, while buyers who want a known noise spec and comparable output may lean Firman. Match the choice to your typical load and how often you want to refuel.