# Aeon labs smart energy switch - calling all electricians

OH2
Aeon Labs Smart Energy Switch DSC06
Items:
Number GR1_Power { channel=“zwave:device:controller:node6:sensor_power” }
Number GR1_Meter_Kwh { channel=“zwave:device:controller:node6:meter_kwh” }
Number GR1_Meter_Watts { channel=“zwave:device:controller:node6:meter_watts” }
GR1_Power reports 7.747
GR1_Meter_Watts reports 7.747
GR1_Meter_Kwh reports 2.9

Someone tell me what this means? Hit me with some math. How do you get 2.9 kwh from 7.747 watts?
also, doesn’t seem like kwh goes away when i turn the device off…still stays saved as a value.

http://www.energylens.com/articles/kw-and-kwh

In short, they measure two different things.

W is a measure of power, the rate at which the electricity is used. It is an instantaneous measurement.

“Right now that light bulb is using X W of electricity.”

kWh is a measure of how much energy is used over a period of time.

“In the past 24 hours that bulb has consumed Y kWh of electricity.”

The real question is, over how many hours does the device report energy usage?

I like the analogy on the link above. W is like speed and kWh is like distance traveled.

Yeah i’ve read a bunch about it; what I’m curious about is what that period of time is for:
GR1_Meter_Kwh reports 2.9

Using the math, i can’t figure it out. Best i can figure is its based on 43 hours, which seems weird.
Any why it doesn’t clear when i switch off the device is weird.

Thanks

Rich

Im fairly certain the kWh measurement is from the time it was last reset. Just like your electric meter for your house.