Aeotec home energy meter - confusing sensors

Hardware
1

I just finished installing an aeotec HEM dsb28 (2nd gen) and added to HASS using a z-stick.
I am pretty new to z-wave. This is my first device. I got the device hooked up and reading.
I am running via docker image:
Home Assistant :0.43.0
I get the following sensors auto added for the meter:
sensor.aeotec_dsb28_home_energy_meter_2nd_edition_current_2_20 sensor.aeotec_dsb28_home_energy_meter_2nd_edition_current_2_20_2 sensor.aeotec_dsb28_home_energy_meter_2nd_edition_current_2_20_3 sensor.aeotec_dsb28_home_energy_meter_2nd_edition_energy_2_0 sensor.aeotec_dsb28_home_energy_meter_2nd_edition_energy_2_0_2 sensor.aeotec_dsb28_home_energy_meter_2nd_edition_energy_2_0_3 sensor.aeotec_dsb28_home_energy_meter_2nd_edition_power_2_8 sensor.aeotec_dsb28_home_energy_meter_2nd_edition_power_2_8_2 sensor.aeotec_dsb28_home_energy_meter_2nd_edition_power_2_8_3 sensor.aeotec_dsb28_home_energy_meter_2nd_edition_previous_reading_2_1 sensor.aeotec_dsb28_home_energy_meter_2nd_edition_previous_reading_2_1_2 sensor.aeotec_dsb28_home_energy_meter_2nd_edition_previous_reading_2_1_3 sensor.aeotec_dsb28_home_energy_meter_2nd_edition_voltage_2_16 sensor.aeotec_dsb28_home_energy_meter_2nd_edition_voltage_2_16_2 sensor.aeotec_dsb28_home_energy_meter_2nd_edition_voltage_2_16_3

I am confused by these. Why are there 3 of each. The meter only has 2 clamps.
Even then the readings don’t make any sense to me.
if I look at my utility power meter my current consumption reads : 0.677 kW
and hass shows
sensor.aeotec_dsb28_home_energy_meter_2nd_edition_power_2_8: 641 watt sensor.aeotec_dsb28_home_energy_meter_2nd_edition_power_2_8_2: 33.35 watt sensor.aeotec_dsb28_home_energy_meter_2nd_edition_power_2_8_3: 553.33 watt

So I am totally lost as to what these readings mean.
Can someone who has one of these things please help me out here.

2

This link may help you out.
https://aeotec.freshdesk.com/support/solutions/articles/6000161943-home-energy-meter-gen5-user-guide-

I have similar sensors that show up, so your’s appears to operating the way it should.

A kW is 1000 watts, so that makes sense to see 0.677 kW on your utility meter and then 641 watts or around there from the HEM. You are probably just seeing a bit of error between the two devices as neither are probably all that accurate in the grand scheme of things.

The HEM has two CTs (current transducers) that you clamp around your incoming hot wires from your meter. I think you are just seeing the difference between the two legs… ie they are not equally balanced, which is just a function of your panel / house configuration and what circuits may be drawing more current at that time. One is reading 33.35 and the other is 553.33. The weird thing, is that they should add up to 641 but it doesn’t in your case. I just checked mine and they sum exactly. But that is why you see 3… 1 for each clamp, and then a total.

1 Like
3

Thank you. I will read through the link you provided.
Initially that was my thought too…that one was total and other two were individual but the fact that they don’t add up is what is causing me to wonder what the problem is.
I am ok with there being a slight error between the utility meter and this meter. But the two legs not adding up is driving me nuts.

4

Following this with interest as I purchased the same unit and haven’t gotten around to installing it yet.

5

Other than the Wattage, all other numbers add up. as in A+B=Total.