M30 configure yaml for ESPhome

[admin]

please contact with whatsapp number: +86-15381188302

[roflas]

I do not use whatsapp, sorry. Is it possible to answer here?

[admin]

It's okay, if you really can't solve your problem and are not satisfied with the product, we have already sent you the solution via email, you can chceck.

[pawelb]

Ok the ct clamp above is the one I mentioned, which I received from the seller along with the new M30 unit, and it gives equally weak readings as the other two. Are these clamps correct?

[admin]

i can't see your photo.

[pawelb]

Again, other source.

[admin]

if the CT sensor is 2000:1 , it can work with kincony board.

[pawelb]

Ok below is my conclusion from support conversation:

* Power (W) Readings: When compared to a Shelly EM on the exact same circuit, the M30's readings are off by as much as 100%.
* Energy (kWh) Accumulation: The total energy counter randomly jumps by 1 kWh and fails to accumulate energy usage correctly.
* Calculation Mismatch: There is a significant discrepancy between the power reported by the device and the power calculated manually (Current x Voltage). For example: 0.614A * 235V should be ~144W, but the device reported only 1.4W.

Phase 1: Testing with the Original M30 Board
Initially, I tested the M30 with various loads, from a few milliamps to 10 amps. I used both a recommended YHDC SCT-013 clamp and another one from AliExpress. The results were consistently wrong with both. I also tried different firmware, including the KCS version, without any improvement.
Here is a sample of the initial measurements taken with the original M30 and original clamps:
* Under Load:
   * Shelly EM: 528W
   * Kincony M30 (with YHDC clamp): 357W
* Without Significant Load:
   * Shelly EM: 188W
   * Kincony M30 (with YHDC clamp): 231W

Phase 2: Testing with Replacement Hardware
After contacting the seller, I received a brand new M30 board and a new 10A CT clamp. Unfortunately, the issue is exactly the same. The behavior remains:
* At low power usage, it reports 50-100% more than the actual value.
* At higher loads, it reports 80-100% less than the actual value.
I am attaching screenshots from my latest test, comparing the new M30 (using KCS firmware) with my Shelly EM.
* In the KCS screenshot, Power_1 is measured using my old 20A CT clamp.
* Power_2 is measured using the new 10A CT clamp that was sent with the replacement M30.
(Attach screenshots: "Screen Shot 2025-05-29 at 08.26.57.png" and "Screenshot_20250529-082708.png")
Given that the problem persists across two different M30 units and three different CT clamps, I am at a loss.





Could you please clarify how these readings could be accurate? If you’re certain that another clamp is required, please provide one, as I have already received a clamp from the seller in accordance with the service department’s instructions.

[roflas]

Hi,


it really seems that there are issues with the calibration of device.

Could you tell me modbus addresses you used for calibration, i.e. to enter offsets and other values? Or you have not calibrated anything? I have not found EN manual, just chinese of those energy meter components. Perhaps you have your calibration process that you would be willing to share?

All 30 channels work consistently incorrectly.

[sc00bs]

Hi,


it really seems that there are issues with the calibration of device.

Could you tell me modbus addresses you used for calibration, i.e. to enter offsets and other values? Or you have not calibrated anything? I have not found EN manual, just chinese of those energy meter components. Perhaps you have your calibration process that you would be willing to share?

All 30 channels work consistently incorrectly.

I am having similar problems with my M30. 

I don't see how changing the calibration correction factor could sort the problem out as the % difference changes on the readings changes with a higher % difference at lower amperage readings. 

I have a number of different sized CT Clamps that I ordered from the Kincony store 30A, 60A & 100A.