Domoticz Community Forum - Support & Discussion

I've place two entry widgets on my dashboard. As you can see on the screenshots, I actually deliver 521 W on phase L1 and consume 539 on phase L2 and L3.

Is it possible to configure one of the widgets with a 'Energy netto'? So in my example 539-521= 'Consuming 18 Watts'?

You can add a device widget to the dynamic dashboard and choose the P1 meter. Or if you only want the actual power: I also have a separate utility device that shows the pure netto value (filled by a dzvents script)

@imautohuttraeger The usage, delivery values only are shown when you have a 3 phase connection. Then there could be usage on 1 phase and delivery on another.

@hansbit This has been in the design of Domoticz from the beginning. Workaround would be to create a dummy P1 meter and fill this with the nett values.

waltervl wrote: Wednesday 16 September 2026 15:28 @imautohuttraeger The usage, delivery values only are shown when you have a 3 phase connection. Then there could be usage on 1 phase and delivery on another.
[...]

I understand. But @hansbit is writing about L1, L2 and L3 --> so she/he has a 3 phase system. Or am I missing something?

imautohuttraeger wrote: Wednesday 16 September 2026 18:12

waltervl wrote: Wednesday 16 September 2026 15:28 @imautohuttraeger The usage, delivery values only are shown when you have a 3 phase connection. Then there could be usage on 1 phase and delivery on another.
[...]

I understand. But @hansbit is writing about L1, L2 and L3 --> so she/he has a 3 phase system. Or am I missing something?

Yes I (he ) have a 3 phase system. With the (small) solar system only on L1. I will make a dummy device 'Netto usage' and let dzvents calculate the value. Thanks all for your support.

Now I understand, Mr. Hansbit

Strange. I remember, when I had a small slolar system just on one phase (now I have a big one on three phases), that the virtual P1 meter balanced production and consumption to one net value.

No, the smart grid meters in NL don't. The meter LCD displays a summed L1+L2+L3 consumption for counting (kWh) and actual delivery (W) and a summed delivery (L1+L2+L3) for counting (kWh) and actual delivery (W) which is sent to the company for billing. So the company can use different cost rates for consumption as for delivery. Domoticz reads on the P1 all separated values and displays these same values in their energy meter, that is necessary when costs for consumption and delivery are different and you want Domoticz to calculate your energy costs.

Ah - I see. In Germany, the meter shows

Energy counter in kWh for consumption
Energy counter in kWh for production
Actual power in W as a net value (summed up)

Differentiation between consumed and produces power is also measured of course, but not displayed thus the transfered data for Power in Watt to my virtual P1 is only the net value.