I have been interested in monitoring our electrical use, especially since it has gone up significantly since we keep the spa warm all winter.
I started with a monitor for just the spa circuit. The Efergy kit has two clamps for the circuit wires that are plugged into a transmitter to send the signal from the electrical wires to a monitor and/or to an internet hub.
The clamps plug into the battery powered transmitter and the monitor, also battery powered, receives the signal and records the data. It keeps a history for the day, week, and month but that data cannot be downloaded. Currently the history shows 14.04 KWH for the day and 127.4 KWH for the week. I have not used it for a full month, but so far this month the total shows 584.3 KWH.
The Efergy Hub system records the data on an internet account where current use and history of use data can be downloaded. The hub system picks up more than one transmitter so there is now one on the house separate from the spa sub panel and I could place one on the air conditioning sub panel later as well.
There is also an iPhone app to read data. This is current data.
And a short graph of the today’s historical usage. Obviously the spa is the big user of electrical power.
I also purchased an outlet monitor. I am thiniking I will use it with energy hungry appliances like the refrigerator or the microwave. It will record a 110 circuit.
I would need additional transmitter kits to record other 220 volt appliances etc. It would be nice to have several of these kits and outlet readers. This one cannot be controlled with IFTTT which is what I bought for the air quality monitor to control the ventilation system. So that one will record information on a different platform.