What Size Generator Do I Need to Run a Dishwasher?

The two charts disagree by a wide margin. Cover the higher running figure.

Quick answer: Honda lists a cool-dry dishwasher at 216 running watts and 540 starting watts, and Champion lists a dishwasher at 1,200–2,400 running watts with no separate start. The charts disagree, so the size that covers both clears 2,400 running watts. A Honda EU2200i rated at 1,800 W, even with a 2,200 W maximum, does not cover a 2,400 W running load, while two units in parallel reach up to 4,400 W and the Champion manual lists 5,000 W running.

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Running and starting watts

Load	Running watts	Starting watts	Source
Dishwasher, cool dry	216	540	Honda
Dishwasher	1,200–2,400	Not listed	Champion

Honda's wattage guide lists starting watts, then running watts. Champion's chart lists running watts, then starting watts. This table puts every figure in the Running and Starting columns. Not listed means that source does not give a separate starting figure.

How to size it

Add the running watts of every load that will be on together, then add the single highest starting surge (Generac; Honda). Generac notes that starting watts are often 2–3 times running watts, and that standby units should get a dealer survey.

Do not invent a Champion start. Honda's start is 540 W, which is already under Champion's running range. If your machine matches the cool-dry row only, the EU2200i rated output of 1,800 W covers 216 W running and the maximum of 2,200 W covers 540 W starting.

Check a full load list on the generator size calculator.

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Run the generator outdoors only, 20 ft from the house (CPSC).

FAQ

Why is Champion so much higher than Honda?

They are different published rows. Honda is a cool-dry dishwasher at 216 W running and 540 W starting. Champion is 1,200–2,400 W running with no separate start. Cover 2,400 W if you do not know which row matches the machine.

Can a Honda EU2200i run a cool-dry dishwasher?

Yes for Honda's row. 216 W running is under 1,800 W rated, and 540 W starting is under 2,200 W maximum.

Does the chart list a heated-dry surge?

No. Use the listed figures only. Champion does not list a separate start at all.

What if the washer is on the same generator?

Add the washer's running watts, then keep the higher start. A washer start can be 2,300 W, and the dishwasher running load can be 2,400 W. The generator has to cover the combination, not just one row.