Which one is better for whole-home backup?

The DuroMax. Its 50A 14-50R outlet and 10,500 running watts can feed a transfer switch for a full panel. The Generac tops out at 8,000 watts and is better suited to a few circuits.

Is the DuroMax worth about $380 more?

Yes if you want propane or whole-home hookup. If you only need to run a fridge, lights and a furnace blower on gasoline, the Generac does that for less.

Which runs longer on a tank?

The Generac, up to 11 hours at 50% load on 7.9 gallons. The DuroMax runs about 8 hours at 50% load on 8.3 gallons, though it sips fuel at light loads.

Can either one run a central air conditioner?

The DuroMax can start many central AC units with 13,000 peak watts and a 50A outlet. The Generac's 10,000 peak watts with PowerRush may start a smaller unit, but check your AC's locked rotor amps first.

Do both protect against carbon monoxide?

Yes. Both shut the engine off when CO builds up. Neither is safe to run indoors or in a garage, even with the sensor.

Which is easier to move?

The Generac. It weighs roughly 50 lbs less and has a fold-down handle and never-flat wheels. The DuroMax is 248 lbs and better left in place.

DuroMax XP13000EH Generator vs Generac GP8000E Portable Generator

Buy the DuroMax XP13000EH if you need whole-home backup or want the option of propane. It runs 10,500 watts on gasoline and about 10,000 on propane, and its 50A 14-50R outlet can feed a transfer switch. Buy the Generac GP8000E if you want a lighter, cheaper gasoline-only unit for a few circuits. As of November 5, 2026, the DuroMax is $1,298.82 at Outbound Power and the Generac is $919.50 at eBay.

Today the Generac GP8000E Portable Generator costs $379.32 less at its best price.

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