Sunday, March 7, 2010

What generator capacity can i use for 6, 2hp a/c,4 bath water heater,1 cooker unit and 40 light&socket points.?

I would say at least an 8000 watt generator would do the job...Nothing less...





As for the assumption of you needing a 40,000 watt generator for a residential house...Good luck on even trying to find something so massive. Kohler makes gernerators of that size %26amp; larger to back up the power on large businesses %26amp; hospitals. Seriously, an 8,000 to 10,000 watt generator would back up a home the size you had mentioned.What generator capacity can i use for 6, 2hp a/c,4 bath water heater,1 cooker unit and 40 light%26amp;socket points.?
If you go with a 10KW generator, you will have to select the load. It will be fully loaded with 1 AC unit, minor lighting and refrigerator. It will be fully loaded if the water heater kicks in. 8KW = no hot water or stove. Those small units are for lighting back-up and neither has any safety margin.

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What generator capacity can i use for 6, 2hp a/c,4 bath water heater,1 cooker unit and 40 light%26amp;socket points.?
Let's add it up:





One horsepower = ~750 watts


6 x 2 x 750 = 9000 watts





Assume a 40-gallon electric tank-type water heater drawing an average of 22A @ 240V.


22 x 240 = 5280 watts





Assume a standard electric 4-burner range + oven drawing 40A @ 240V


40 x 240 = 9600 watts





Assume 1A per lamp/point at 240V - this is high for lamps but a good average for all combined.


1 x 40 x 240 = 9600 watts.





9000 + 5280 + 9600 + 9600 = 33,480 watts.





That is everything at once (and you forgot the refrigerator, microwave, washer, dryer and so forth). All other things being equal and that you do not want to run at/near peak capacity of the generator, you will need a minimum of a 40,000 watt (40KW) unit. This gives you a safety margin. This is on the assumption that you want to be able to run everything at once - as opposed to a selective load during a power-failure.
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