Generac #7247 XT8500EFI vs Powermate PM9400E

Comparison Overview

Key takeaways

• Generac #7247 XT8500EFI delivers 8500 running watts and 10000 starting watts.
• Powermate PM9400E provides 7500 running watts and 9400 starting watts.
• Powermate runs 10 hours at 50% load, Generac is rated 9 hours.
• Powermate weighs 188 lb, Generac weighs 214 lb for moving and storage.
• Both are gasoline, non-inverter generators with 3-year warranties.

Best use cases

Choose the Generac #7247 XT8500EFI if you want more breathing room for heavier household circuits or tougher motor starts. With 10000 starting watts and 8500 running watts, it’s the better fit when you expect multiple loads to overlap, for example running a refrigerator and freezer while also starting a sump pump, well pump, or a larger window AC. It also makes sense for a job site where tools may start under load, like a larger air compressor or saws cycling on and off. The tradeoff is weight at 214 lb and a shorter rated run time at 9 hours at 50% load, so you may refuel a bit more often during longer outages.

Choose the Powermate PM9400E if your backup plan is more about steady, moderate loads for longer stretches. Its 10 hours at 50% load (and 13 hours at 25% load) is a real advantage for overnight use or when you want fewer refueling breaks. At 188 lb, it’s also easier to move around a driveway, job site, or storage area. The compromise is lower output at 7500 running watts and 9400 starting watts, which can matter if you’re trying to start multiple motor loads close together.

For camping, RV use, or powering sensitive electronics, neither is ideal because both are non-inverter models, meaning they’re typically louder and their power is not as “clean” as an inverter generator. For home backup and tools, both can work well, but sizing your expected loads is the deciding factor.

Verdict & recommendation

If your priority is handling bigger starts and running more at once, the Generac #7247 XT8500EFI is the safer pick thanks to 8500 running watts and 10000 starting watts. It’s the one to lean toward when you don’t want to babysit what turns on next.

If your priority is longer run time and easier maneuvering, the Powermate PM9400E makes a strong case with 10 hours at 50% load, 13 hours at 25% load, and a lighter 188 lb build. You just need to be a bit more intentional about high-surge appliances.

In practice, choose based on whether your outage or workday is limited by peak power (Generac) or by refueling and portability (Powermate).