I have an all electric house at the moment and after doing the obvious efficiency changes and being in the summer with no AC and no heat turned on I have an electric bill using 1112 kwh in a month so since I want to cut that in half at least, over the weekend I picked up a meter to measure watt usage of various things in my house.
http://tinyurl.com/agx46
to be exact.
1 kwh costs me 0.0605 cents in case anyone is wondering and I'm going with 30 days to a month for ease of calculation
I figured I'd post up some of the results here as I find them.
Cable box - This bad boy sucks down 19 Watts when turned on. Interestingly enough it also sucks down 19 watts when turned off. mine runs 24 hours a day because it loses it's programming if you unplug it. so thats about 480 watts/day or 3 cents/day which is 14.4 kwh/month or 90 cents/month
Dehumidifier - This one alternated between 200 and 350 watts when running. Running about 12 hours a day it was using 3.6 kw or 22 cents/day or 108 kwh/month which is $6.50/month, ok so thats about 9% of my usage, I'll look into replacing that beast.
Microwave - This one takes 3 watts to sit idle and tell me the time. so 72 watts/day or .4cents/day or 13 cents/month. Pretty good, BUT when running it spikes up to about 1500 watts, it moves around a bit up there. now I use it about 1 minute/day maybe 2 at most so lets go with that. that would be about 0.080 kwh used which is close enough to say that the microwave costs me 1 cent /day or 30 cents /month
Now all of my indoor lights are 13watt cfl since most of them are regular sockets I can't measure them, But I do have a floor lamp with one in it. Turns out it uses 14 watts when running. Since I always turn them off and I like it dark I would say I have 3 hours/day of one bulb running. So thats 0.039 kwh/day or 1.170 kwh/month at that level who cares about the 7 cents/month. In the winters it's different of course, I'd guess that will triple in useage. I can live with 3 kwh/month for lights.
I have a fish tank. Nothing spectacular pump, heater, light.
with just the pump it uses 12 watts. this runs 24 hours a day
with the heater on it uses 67 watts
with the light on it uses 80 watts.
I'm going to guess that it averages 40 watts ( I can and will measure this but haven't left the meter in place for a day yet) Anyways that works out to 0.96 kwh/day or 6 cents. thats 28.8 kwh/month or $1.75/month. nothing really but I will probably be selling this as soon as the last two fish take that final swim down the toilet.
My stereo, is a small shelf system that I use as the speakers for my tv. It has a powered sub that goes into standby mode when not in use.
turned off/in standby it uses 26 watts.
turned on it's power use of course is determined by volume(nothing can ever be simple can it). Normal listening volume for me uses 35 watts That includes the sub being on(which it normally isn't)
Now assuming that i listen to tv/computer/stereo 5 hours/day thats about 0.54 kwh/day. or 3 cents. 16.2 kwh/month or 98 cents/month. I thought this would be way worse. Keeper I guess, too bad I'm out of inputs...
So at this point I've accounted for 171 kw/h which is 15% of what I use in good months. so the hunt continues.
things that are active in the house that I still need to test are,
fridge (I think it's 110V) It's also older
computer and all it's crap ( this could hurt, It's always on and is loaded)
TV and vcr when running ( I unplug them when not in use)
crappy little nightlight ( if this costs me 5 cents/year I'll be shocked)
radio in bedroom
ozone generator for water system
filter for water system
washing machine (2 loads/week)
Things that I can't test mostly because they are 220 I believe and the meter doesn't do it
circulation pump ( this bad boy is a 1 hp pump running on high 24/7 I bet it's good for 500 kwh/month on it's own, and It can be replaced with something 1/30th the size.
pressure pump
stove ( I don't cook a lot anyways but it still adds up I bet)
hotwater tank (this thing is running when I get home from work on most days) I shower in hot in the morning and do dishes every couple of days in the evening, the rest of the time I'm heating the world) I want an electric on demand to replace it.
dryer (used once/week in winter once/month in summer)
Really I think thats about it. I have so little around here I'm just floored by my bills. In the winter add an extra 500 kwh to the bills to heat the place but subtract the 108 from the
Dehumidifier. I really do think changing out that circulation pump may account for 50% of my useage. It's like having a hot tub running on high 24 hours a day. for the $200 it will cost me I should do it just to see.
Anyways I hope these numbers are useful to some of you. I'll measure those other things that I can and fill you in over the next couple of days.