So - I rigged up a few of them so I could plug them into the Kill-A-Watt. Knowing that just one would probably register too low, I figured I'd get a more accurate reading if I hooked 5 up then did the math.
Here's the rig - I took 5 US1140's - 4 brand new, one a used one - and I taped them together with electrical tape side-by-side (each one individually to keep it tight and secure). I found an old PC power cord (the standard C13 power cord) to sacrifice - cut the end off and hooked up the switches to hot, neutral, ground - and taped off all the load and remote wires - and hooked it up in the kitchen to a GFCI-protected outlet just for extra safe good-measure.
So - some fun stats:
- Power Factor = 0.7
- Combined (5 US1140's) consume 3 watts; almost 4 (it jumps up when you play with the switches)
- The power consumed jumps quite a bit when you're interacting with the switches (expected)
- The amps consumed for all 5 sat around .4
- I threw all 5 into setup mode and added them fresh to my network - in the process, especially during the writes, the amps jumped all over the place, including up to a little over 1 full amp.
- Off or On didn't seem to matter, nor did color of the lights - it just jumped after being switched (most likely when transmitting status).
My power gets into the high tier (I think I'd end up there even if I unscrewed every lightbulb in the house and turned off my AC - the limit is low!) - so basically anything new added to my power bill will be at the high rate - which is $.409/kWh - an absolutely insane price to pay for power... the highest it could go in my last neighborhood was $.13
So - I plugged that into the Kill-A-Watt and let it run for a bit - and checked out the cost - it's at about $10.72 to run 5 switches for a year. I'm installing about 50-60 switches, so times that by 10 - I'll be looking at $107/year, or an extra $8.92/month just to have these switches.
The good thing though is that I use the switches to set all the lights to only turn on to 80%, and keep them dimmed quite often now, so hopefully that'll off-set any costs (means I'm not saving as much as originally hoped tho!).
I'm very new to power monitoring and caring (funny how a $700 electric bill will do that to you!) - but I'll have this rig set up until Saturday if you guys want me to test any other scenarios or get any other types of readings. I have the Kill-A-Watt-Ez (I don't know what the difference is).