I recently bought a kill-a-watt thingy off ebay, it's quite interesting
to see what electronics use what as far as power consumption.
This assumes average power cost of 8.5 cents per kwh (winter is $.075
and summer $.09)
My washing machine pulls .38kw/h per 18 minute load = ~3 cents per load
My christmas tree costs ~3 cents per hour that it's on.
My laptop pulls .02kw/h which means it only costs 2 cents per hour to
run it, or $15/yr
Surprisingly my humidifer would cost me $5.60 per week if I ran it
24/hrs a day.
My printscanfaxmachine costs me $9.50/yr to keep it plugged in and on
round the clock.
I haven't yet tested my dishwasher to see what a 55min heated wash
cycle costs, nor my refridgerator or microwave (essentially an unneeded
clock when not reheating my food).
I recently switched my entire household to compact fluor. lights, so I
probably won't bother measuring individual light fixtures. I wish P3
made a 240v meter. Curious what my dryer pulls.
After that I'll be measuring my landscaping lighting in the backyard,
curious about that one.
HAS ANYONE DONE EXPERIEMENTS WITH THE FOLLOWING: I'm trying to figure
out if it would be cheaper to put my water heater on a timer to turn it
off at night (from midnight to 8:30AM), or if it would use more
electricity reheating the water in the AM than it would keeping it warm
all night. I'm in AZ so the coldest it gets in the garage is probably
50 in the winter, and during the summer, well, probably 100. My water
heater is a brand new GE 8yr warranty 50 gallon dual element that I
Also, wonder if it would be more cost effective to turn it up to 140
(from 125) and not use the dishwasher heating element for the wash.
Would also effectively lessen the amount of hot waster used for other
purposes, but to what end?