time2roll wrote:
Probably split phase 240v so only half power available at each 120v outlet.
I recommend a generator with a 30 amp 120v outlet for best power results.
That's it! The "open frame" or "job site" generators often (probably usually) have two 120-volt circuits at opposite electrical phases. They can deliver their full rated power only at 240-volts. Well pumps are often 240. So if you had a field of these, you could power them up to the rating of the generator.
This is the commonplace issue: Say your RV A/C needs 3000 watts. A 3500 watt RV generator can run it, because they are built to deliver their full rating on ONE phase. But a 4000 watt job site genny cannot, since it can handle up to two 2000 watt loads.
I think it was HF that offered two very similar generators awhile ago and one of them had the 3-prong RV socket. The other had the "twist lock" and those signify that two-phase output.