Originally Posted by StuM
200 Amps is about 8000 BTU (assuming a nominal 12V system). If that's enough cooling
power, then OK, but it's not a lot.
Stu, I think you made mistake of directly converting electrical
power to cooling
power. In other words:
200 A x 12 v = 2400 W gen output
2400 W x 3.412 BTUH/W = 8200 BTU/hr (incorrect for cooling)
But an air conditioning
cycle uses electrical
power to move heat and the cooling capacity in W is greater than the energy input required in W. This is cooling coefficient of performance (COP) and usually ranges between 2 and 4. In USA AC units are rated in SEER which is BTU per Wh ratio of cooling to electrical energy.
If assuming a SEER value of 12 or COP of 3.5 you get (for the 200 A supply):
2400 W elec input x 3.5 COP = 8400 W cooling
8400 W x 3.412 BTUH/W = 29,000 BTU/hr cooling
Of course any generator
would need to handle the high inrush current
demand of the compressor
unit starting, which is usually a limiting factor.