Which has more power for a transfer switch?

The Generac, at 7,500 running watts and 9,375 peak watts on gasoline versus 5,250 and 8,125 for the Champion. The Champion's output falls further on propane or natural gas.

Is the Champion worth $150 more?

Yes if you value tri-fuel operation, 64 dB(A) running, remote start and a 3-year warranty. If you only burn gasoline and want the most watts, the Generac is the better buy.

Which runs longer on a tank?

The Champion, at up to 18 hours, though that figure is at partial load. The Generac lists 11 hours at half load on its 8-gallon tank.

Can I run either one on natural gas?

Only the Champion. It ships with a 25 ft natural gas hose and makes 4,253 running watts on natural gas. The Generac is gasoline only.

The Champion, rated 64 dB(A). Generac does not publish a noise figure for the GP6500, so there is no number to compare.

Do both protect against carbon monoxide?

Yes. The Generac uses COsense and the Champion uses CO Shield. Both shut the engine off when carbon monoxide builds up, but neither is safe to run indoors.

Generac GP6500 Portable Generator 7680 vs Champion 6500-Watt Electric Start Tri-Fuel Portable Generator with CO Shield

Buy the Champion 6500-Watt Tri-Fuel if you want quieter running, remote start, tri-fuel flexibility and a 3-year warranty. Buy the Generac GP6500 if you need maximum running watts on gasoline and want to spend less. As of November 4, 2026, the Generac is $849.00 at The Home Depot and the Champion is $999.00 at The Home Depot, a $150 gap.

Today the Generac GP6500 Portable Generator 7680 costs $150.00 less at its best price.

Ask our shopping agent