Power consumption from "sub" meters

Configuration
1

Hi!

I have multiple levels of power metering. First on the incoming power line, then on indivudual fuses and finally on a few individual outlets. Is it possible to link the sub-consumptions of a smart outlet and the fuse meter?

If this is not done I assume that the consumptions of the individual outlet will be added to that of the fuse. This will give a to high total consumption.

2

If you are talking about the energy dashboard:

The incoming power line is your grid sensor in the Energy set-up. All the rest are put in the individual devices section. These are not summed, or used in the “overall” graphs. They are just displayed individually.

3

Not sure exactly how your electrical installation is done, but I understand that your outlet meters are downstream of your fuse ones, so are already included.

4

Ok, thanks then I guess there is no problem. :slight_smile:

1 Like
5

Hi, I have a similar setup and I found this thread, but I’m not sure it answers my doubt.

I have a smart power strip with individual switches and power metering, which is plugged into a UPS.
I’m looking to add a Shelly PM Mini Gen3 (no relay) in the wall plug to measure the consumption of the whole UPS, which includes the power strip.
I don’t want the power strip consumption to be counted twice in the energy dashboard. It would still be nice to see the consumption split between power strip and everything else on the ups. The latter would just be the difference between the total from the Shelly PM Mini Gen3 and the power strip.

Does that make sense? Is this achievable in the Energy dashboard?
I believe that just adding both devices to the Energy dashboard would sum their consumption, effectively counting the power strip twice.

6

Anything you add to the individual devices section will not be summed with the grid total. They are graphed separately.

Screenshot 2025-02-21 at 00-07-20 Settings – Home Assistant
Screenshot 2025-02-21 at 00-07-20 Settings – Home Assistant1871×864 107 KB

Screenshot 2025-02-21 at 00-06-43 Energy – Home Assistant
Screenshot 2025-02-21 at 00-06-43 Energy – Home Assistant644×945 59.3 KB

7

That’s good, thanks for the reply!
Focusing on the bar chart at the bottom I see the individual devices’ consumption is subtracted from the totals. So if you have a total consumption of 10kWh for a specific hour, and you are tracking a single device that pulled 1kWh in that hour you will see:

  • 1 kWh your tracked device
  • 9 kWh untracked consumption

The total consumption from the first chart at the top is used in the last chart and subdivided by device.

In the same example, imagine if instead you have a wall plug that reports 7 kWh for that hour, and you also have a smart plug which is connected to that wall plug via a power strip (among other untracked things on the strip) reporting 5 kWh. This means all other devices plugged into the smart strip drew a combined 2 kWh of power. But what would adding both devices show?

I’m thinking it would break the bar chart because it would show 7 kWh from a device + 5 kWh from another device (12 kWh total) out of a house total of 10 kWh, which doesn’t make sense. The system can’t know that the 5 kWh are actually part of the 7 kWh.

The desired result of the 10 kWh example would be:

  • 5 kWh from the downstream smart plug
  • 2 kWh from the wall plug (7 - 5 from downstream)
  • 3 kWh untracked consumption (10 - 7, rest of the house)

If these assumptions are correct, is there a way to make this work?

8

Would a sensor like this work?

template:
  - sensor:
      - name: Wall plug untracked devices
        state: "{{ states('sensor.my_wall_plug') | float(0) - states('sensor.my_smart_strip') | float(0) }}"

I would then add both this sensor and the power strip to the “Devices” section of the energy dashboard.