[RE-wrenches] Air Conditioning energy usage

[William Miller]

Friends:



In the old days when a client suggested they might want to run air
conditioning equipment on an off-grid system we would just laugh.  Now I
find I get that request more frequently and clients are willing to pay to
acquire enough system capacity to run AC equipment.



This means I need to size off-grid installations appropriately for the
loads.  I have a job pending with a 5 ton AC unit.  I cannot find real-life
energy specs.



I do have a new, fairly efficient 3 ton unit at my grid-connected home and
I do have energy monitoring.  On a real hot day recently we used a little
less than 11kWh in this unit.  The max power draw was about 2.5 kW.



Here are my questions:



1.   Can I linearly extrapolate my usage to a 5 ton unit?

2.   Do any of you have real-life, measured energy data on modern AC
condenser units that you would be willing to share?



Thanks in advance!



William Miller



Miller Solar

17395 Oak Road, Atascadero, CA 93422

805-438-5600

www.millersolar.com

CA Lic. 773985
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