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I have a new champion generator, 120volt at 20 to 30amp. The previous home owner had the same unit but 240 volt. The home has a professionally installed system for power backup but has a 4 pin 240 volt outlet as per photo.

My question is, can I adapt my unit to the 240 volt system which I think is split phase because it also runs a 1.5HP well pump motor?

champion generator

  • Unlikely unless you can the owner’s manual – Tony Stewart Sunnyskyguy EE75 Sep 26 at 18:27
  • No chance. Call Customer Tech support – Tony Stewart Sunnyskyguy EE75 Sep 26 at 18:48
  • Any reason you can't take this generator back and get a bigger one? – ThreePhaseEel Sep 26 at 19:53
  • This generator can run 1 leg of a 240v system. No 240v loads if your well pump is 120v this generator could push most wells and a refrigerator but anything more would be pushing it unless you have a shallow well usually 1/2hp sometimes 3/4hp I would want a 240v 5kw for minimum power for a home with a well. Your generator is only rated for 12.5 amp continuous so with a well starting at the same time as the fridge it may not hold up so a larger generator and 240v would be my suggestion 5kw with peak 6.5kw will run most homes at a minimum level of gas heat or wood burning with fans for heat. – Ed Beal Sep 26 at 20:05
  • I hope you want to plug that into an inlet, not an outlet. – Jasen Sep 27 at 2:59
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Nope, no chance.

You can't get there from here.

The only way to do it involves some wild back-flips with a 5 KVA 120/240V transformer, but those are $400+. (you can occasionally get a find on Craigslist, but even then, the price will be greater than the price diff between this one and the generator you need.)

So back it goes.... if the well is a priority.

If it's not a priority, then maybe we can hook this up, but we'll need to see a much more detailed look at your generator interlock or transfer switch equipment, and how the panel is wired.

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