Which is better for whole-house backup?

The Westinghouse. Its 9,500 running watts and 14-50R outlet support a transfer switch and heavier loads, and propane gives you a second fuel source. The Generac's 8,000 watts suits essential circuits only.

Is the Generac worth saving $100?

Only if you will never use propane and 8,000 watts covers your needs. The Westinghouse adds dual fuel, remote start and 1,500 more running watts for $100 more at current prices.

Which runs longer on a tank?

Close. The Westinghouse runs up to 12 hours on 6.6 gallons; the Generac runs up to 11 hours at 50% load on 7.9 gallons. The Westinghouse is more efficient per gallon.

Do both protect against carbon monoxide?

Yes. Both shut down automatically when CO rises: Westinghouse calls it a CO Sensor, Generac calls it COsense. Neither is safe to run indoors.

Which is easier to move?

The Generac, with a fold-down handle and never-flat wheels, though owners call its handle flimsy. The Westinghouse has wheels and a lift bracket but owners describe it as heavy.

Can the Generac run on propane?

No. The GP8000E is gasoline only. If you want propane, choose the Westinghouse WGen9500DF.

Westinghouse WGen9500DF Dual Fuel Portable Generator vs Generac GP8000E Portable Generator

Buy the Westinghouse WGen9500DF if you want dual-fuel flexibility, remote start and more running watts; it is the stronger all-round home backup unit. Buy the Generac GP8000E if you want a simpler gasoline-only generator with COsense and a lower entry price. As of November 5, 2026, the Generac is $899.00 at Amazon and the Westinghouse is $999.00 at Walmart, a $100 gap.

Today the Generac GP8000E Portable Generator costs $100.00 less at its best price.

Ask our shopping agent

It checks today's price at every store, compares the alternatives and answers in about a minute.