[gbrendemuehl]

You need to make sure the combined circuits are on the same phase. The phases alternate by breaker position, so you can’t put the wires from two adjacent breakers through the same CT, since they are on different phases.

[gbrendemuehl]

I looked at the readings; 15KW instantaneous. If it was limited to 50A, it couldn’t read that amount.

[gbrendemuehl]

I did implement a solution. The boiler has a max draw of 63 amps even though it is on a 100amp circuit. The 20 amp CTs are rated for a maximum of 75 amps.  I purchased two of the 20amp CTs with the larger openings and install them. Seems to work fine.

[gbrendemuehl]

As long as you have utility power in the panel you can add 2 15A breakers to it and run power back to the VUE.

[gbrendemuehl]

I had a similar issue cause by a bad CT. Move a known good one to the circuit and/or move the ‘bad’ one to 1) another port on the Vue; 2) move the clamp to another circuit.

[gbrendemuehl]

The specs state that the Vue uses less than 3W (25mA). That’s below the range of the sensor; low end is 20W (170ma).

From another post:

Jim wrote this on 11/14/2019

“What are the limits of the Emporia sensors?
Our sensors have physical limitations. Each 200A sensor is accurate with high resolution between 2A – 250A (240W – 30kW @ 120V). And each 50A sensor is accurate with high resolution between 0.17A – 63A (20W – 7500W). When you go below those ranges, the 200A sensors will report about 100-150W of noise and the 50A sensors will report about 10-20W of noise. However, when in range, the sensors can resolve differences as low as a handful of watts. The app filters out this noise so you’ll see no load when the sensors are below the threshold of 20 watts for 50A sensors and 90 watts for our 200A sensors. However, if you download the raw data, you will see the reported noise – giving a slight discrepancy between the app and the raw data.”

[gbrendemuehl]

Let me ask you this question, if circuit boxes didn’t have main breakers how would you install it?

“K” is the source side and “L” as the load side. Think of it as the power flows from K to L. The load side is the same both before and after the main breaker (which is just a wire that you can open and close).

But I have no clue say to why it seems to be happy as you have it. As is it should have a negative power measurement. It doesn’t know if you are before or after the main breaker, it should work when power is flowing from K to L.

I would email support. They were good at responding to my questions.

[Author]

Posts