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Kamstrup Omnipower in Sweden: 10x kWh error
Apparently due to a regulatory change in Sweden, Kamstrup Omnipower meters are now sending one extra decimal for energy (kWh). The payload does not contain information on where to place the decimal point, so we unfortunately do not see a way to compensate for that in the code.
The result of this is that the Pow-K device will display a 10x error for energy (ten times too much).
As per 15th January -25, we have indications that not all Kamstrup Omnipower meters in Sweden are affected.
How to check if your meter is affected:
- If your Pow-K is new, wait until the first passing of whole hour (this is when the meter sends Energy/kWh)
- Go check the value shown on the LCD display on the meter.
- The same value shall be shown under the power gauge on the main page:
- If you see the same value - your meter is not affected.
- If you under the gauge see a value that is ten times larger than the value on the meter LCD, keep reading.
If your meter is affected, the fix is easy to implement:
- Open the configuration page
- In the "Meter" section: Activate Multipliers
- Change the kWh multiplier from 1 to 0.1 (effectively dividing the value by ten)
- Press "Save" (bottom right corner)
The setting should look like this:
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Comments
Power through P1
By: Mattias F On 16-May-2025My net operator in Sweden says that the HAN on Kamstrup Omnipower delivers no voltage at all and that any module connected to P1 must use an external power source. Still I get the impression that the POW-K RJ12 works without any other power source than what the P1 delivers.
If you could clarify this to that would be great and I will hit that buy-button
regards
Mattias
Replied by: Egil Opsahl On 19-May-2025