Champion 3500-Watt (100555)

The cheapest way to actually keep a fridge, furnace fan, and sump pump alive.

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Specs

Figures are the manufacturer's published specs; dashes mean the maker doesn't publish a number. Verify against the current datasheet before you buy.

What can it actually run?

Checked with the same math as our calculator: total running watts, plus the single largest motor surge on top. “Tight” means it technically fits but the load sits above 80% of rated output — fine briefly, not where you want to live.

• Fridge, Wi-Fi, and lights

  730 W running · 2,230 W peak
  ✓ runs it
• Storm essentials (fridge, freezer, furnace fan, sump pump)

  3,080 W running · 4,670 W peak
  ✗ too much
• Essentials plus a 10,000 BTU window AC

  4,280 W running · 6,680 W peak
  ✗ too much
• Most of the house (well pump, central AC, laundry)

  13,680 W running · 35,930 W peak
  ✗ too much

The installer's take

No inverter, no frills — a carbureted workhorse that covers the classic must-run outage load for under $500. It's 68 dBA, so it sounds like a lawn mower; nobody camps next to one on purpose. But for a few outages a year powering essentials through a cord or a small transfer switch, this class of machine is the value king. Run it dry before storage or the carb will gum up.

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