I figured out recently that my home’s base load electricity usage is approximately 17 kWh per day (See Blog post for July 8th). I did this by taking the average usage over 6 days. I have been very curious to figure out what is using that 17 kWh per day!
First, I made a simple table of the suspect appliances and electronics. Here I can record the usage as I measure it.
Second, I decided the first items I would measure would be the TV and the DVR. I plugged in the Kill-a-Watt meter between each of their plugs and the wall outlet. (See an example of how to use a Kill-a-Watt meter at http://energysavings.opalco.com/energy-services/energy-assessments/ )
The Kill-a-Watt meter will show immediately the wattage that the item is consuming. At first, I decided to record what the TV and the DVR use when they are supposedly turned off. The DRV is using approximately 22 watts and the TV is using 1 watt. Have you heard of vampire energy or phantom loads? These are very good examples of that! Over 20.72 hours the DVR consumed .43 kWh and the TV consumed .04kWh. I recorded this in my table below.
When in use the TV consumes approximately 187 – 222 watts. The DVR consumes about the same as when not in use; 22 watts. I decided to look at the consumption over a week of normal usage. The TV consumed approximately 5 kWh and the DVR consumed approximately 4 kWh. Again, see the table below where I am recording the numbers.
The conclusion from this experiment is that the TV and DVR are not big culprits in the 17kWh per day that my house is consuming. Next, I think I will look at my water heater.
Stay Tuned –
|kWh Usage||Cost @ .0758/kWh
|DVR (direct TV receiver)||20.72||.43||.03||The DVR turned “off”.|
|191 (7days 23hrs)||4.01||.30||A week of normal usage.|
|TV (47” LCD)||20.72||.04||.003||The TV turned “off”.|
|191 (7days 23hrs)||5.33||.40||A week of normal usage|
|Hot water re-circulate pump|
|Water purification system|
|Septic system pump|