What size generator to run a microwave?
Microwave draws about 1,000W while running, and being a resistive load it has no startup surge. Allowing 20% headroom, size for at least 1,200W of starting capacity.
Rated output and power draw differ — a 1,000W microwave typically draws about 1,500W from the wall.
Units that cover it
- Westinghouse iGen1500c
1,500W starting · 50% headroom · $399
Comfortable headroom without overpaying for capacity, has a CO shutoff sensor, runs at 52 dB.
Check price - Predator 1800 Watt Portable
1,800W starting · 80% headroom · $349.99
Plenty of room to add loads later, has a CO shutoff sensor.
Check price - Champion 201230
2,000W starting · 100% headroom
Plenty of room to add loads later, has a CO shutoff sensor, runs at 53 dB, runs on propane as well as gasoline.
Check price
Running more than one thing
Most people are not powering one appliance. Add everything you need at once and the calculator works out the real peak — your total running load plus the single largest surge, not the sum of every surge.
Size the whole load