ESPHome compatible invasive DIN power meter

ESPHome
1

Hello to all!

I’m searching for a DIN mounted power meter that is compatible with ESPHome and has the following features:

  • DIN Mounted
  • Invasive installation (I don’t want to fiddle with C-Clamp calibration)
  • NO Relay (i just care about monitoring)
  • No disassembly

nice to have:

  • LCD Display to show real time data

I was looking at the various tuya // tongou compatible one but i cannot find a suitable device

My goal is to put this device after the main entrance to monitor current coming from grid

Any suggestion?

2

Hi

I would have suggested the Powermeter that works great but it uses clamp ! Considering where you want to use it, I would strongly advise to use clamps as it keeps you isolated of main power and current !

Vincèn

3

You forgot to mention the most important factor, the max (or better range of) current to be measured.

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4

As @Karosm said you really need to include voltage and current at the main entrance. With the words you used, most would assume you mean a house/dwelling unit or business. Unless you have VERY low usage (less than 20A) and relatively low voltage (less than 42V) you will have issues with a direct connection and really need to know what you are doing or risk an untimely end.

Most people who do what I think you want, use current transformers and voltage transformers. They provide more than enough accuracy for most applications.

5

Thank you all for the responses. my bad i forgot to add the specs.

I want to monitor an external dependance, so:

  • 220V AC
  • 3.3KWh // 15A MAX (1KWh average // 4.5A)

I would prefer an invasive installation with an all-in-one device to avoid having other wires in the control panel.

I had previously worked with electrical systems so i know how to wire everything safely to avoid being electrocuted or creating a fire hazard.

6

kWh is unit of energy
Ah is unit of electric charge.

A is current, which is needed to pick suitable power meter.
Anyway, did you have a look at Shelly Pro PM? They are high quality meters that work locally out of the box and don’t need hacking / tinkering.
4-channel version has display as well.

7

Not DIN mount and no display, but might otherwise meet your requirements.

8

@Karosm Oh, my bad, corrected the post to avoid confusion

@neel-m @Karosm Thanks for the suggestions, i think i will choose one of the two product suggested.

Or maybe the shelly-pro-4pm if i find a suitable template

Last question regarding Shelly usually comes with programming headers?

9

Shelly pro pm has and gen2 plus pm has as well. Afaik gen3 devices don’t.
Shelly has HA integration and works 100% local, stock firmware is quite complete. Never flashed one, but I expect it’s doable OTA as well…

10

No clamp & No relay - IMHO would be hard to find.
I’m using one TOMZN TOB9e-63M eWelink model and planning to install 4 more.

11

I went for Shelly PM Mini Gen3 super cheap and esphome compatible

I will 3D-print a din mount and add a screen at a later time using this

Thank you all for the support!

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