Westinghouse WGen7500
7,500 running / 9,500 starting W. gasoline.
official Westinghouse page lists 7500 running watts and 9500 peak watts
Amazon searchHome Depot searchUse the 7,500 to 8,500 W portable class as the starting estimate for Sump pump, 1/3 HP, Refrigerator, Furnace blower, 1/2 HP.
Running 2,300 W + largest start delta 1,600 W = 3,900 W peak. Add 25% headroom: 4,875 W.
Sizing estimate only - confirm with a licensed electrician; never backfeed a panel.
Loads used
| Load | Running W | Starting W | Note |
|---|---|---|---|
| Sump pump, 1/3 HP | 800 | 2400 | estimated 3x motor start |
| Refrigerator | 700 | 2100 | estimated 3x motor start |
| Furnace blower, 1/2 HP | 800 | 1600 | estimated 2x blower start |
Models in this class
Generac GP8000E
8,000 running / 10,000 starting W. gasoline.
official Generac page lists 8000 running watts and 10000 starting watts
Amazon searchHome Depot searchChampion 201281
7,500 running / 9,375 starting W. dual fuel.
current Champion 7500 W dual-fuel model used as successor-class substitute for 100891
Amazon searchHome Depot searchWhy the estimate can change
Use nameplate watts when available. Pumps, compressors, altitude, fuel type, and extension-cord voltage drop can all change the practical generator size.