240V from 120V generator
I would love to be able to use the 6KW quiet diesel in my motorhome as a backup generator at the house. One problem is that the house needs 240V while the generator makes 120V. I have not had good l...
Forum Discussion
time2roll wrote:
6kw $1,300
Might have to be dedicated to just the pump.
THIS (step up transformer) IS THE CORRECT ANSWER, BUT THERE ARE SOME ISSUES !
Step one
Have a generator inlet installed on the house and have wired it to a generator interlock in the breaker panel. NOT a transfer switch. Less expensive and it allow you select at the time of the outage which circuits get power.
Step two
DownTheAvenue wrote:
You can feed both 120 volt legs of your house by jumping the one hot leg over to both legs off the house. You will not have 240 volts to power things like the stove, dryer, A/C, but both legs of the house power will be charged with 120 volts.
More specifically, the voltage between the two legs will be ZERO !
Step Three
Size the transformer referenced at the beginning for your well pump. My SWAG is 3000W
Step four
Have an electrician wire a 240V DPDT relay (the coil voltage must be 240V) so that when you DO have 240V the pump receives power . When you DO NOT have 240V (power outage) the 120V runs through the transformer to the well pump.
I would add an additional 240V relay "upstream" from the transformer, wired so that the transformer does NOT receive power when 240V is available.
