stray sentinel
I'm using the Power Flow Card Plus to visualize my energy data, sourced from a GoodWe Inverter and a DSMR Smart Meter.
I've observed a behavior that seems incorrect: The card simultaneously reports an export of solar power to the grid and a consumption of approximately 50W from the grid.
Is it possible that the inverter or meter is misreporting, or could this be an expected reading due to an internal power offset, like the inverter's standby consumption or measurement latency?
Could it be that the "Power consumption" is sourced from solar power, this is data from my dsmr smartmeter service.
Overview of data source
Power production: GoodWe Inverter
Power consumption: DSMR Smart Meter
Power return: DSMR Smart Meter
thorny cypress
My guess is one of your DSMR sensors has a delay
stray sentinel
My guess is one of your DSMR sensors has a delay
I dont think that is the problem, it shows a constant grid consumption. shouldn't the grid consumption be 0 in the last hour shown in this graph? i produce solar energy it consumes this energy right?
thorny cypress
you can't have both grid export and import simultaneously and that's what your power flow card shows
stray sentinel
Yeah i figured, but it shows a constant grid consumption (entire day). Even when solar energy is produced. Does this mean my energy meter doesnt understand that the power consumed is solar energy?
thorny cypress
Your DSMR doesn't understand anything
It just measures power flow
Or do you have a 3 phase system?
thorny cypress
Well then thats the answer. Your consumer and PV are not on the same phase
stray sentinel
Ok so would creating a helper where i subtract PV from PowerConsumed with value 0 when negative solve my issue?
this helper would replace Power consumption
thorny cypress
This is not an issue 😄
stray sentinel
what do you mean?
is the data shown correct? or does my energymeter not understand that the 50 watts are PV instead of grid?
thorny cypress
like I said the energy meter doesnt understand anything. It just reports measurements
so yes the data looks correct to me
stray sentinel
yes it does to me too, but what i am trying to achieve is that my "consumption" is "correct". shouldn't my consumption be 0 when my solar panels are producing more then consumed?
thorny cypress
the phases are independent. In the sense that, you can be producing on one phase and consuming on another phase. That's the data you see
I believe that the energy supplier will correct this for you administratively, but physically there is no way for the PV production on one phase to power a load on another phase within your home
stray sentinel
you're right, this explains the grid usage indead.
What i want is to show the power usage like the energy supplier would administer. I think this would be possible by creating helpers, was thinking something along the lines of this:
Do you think this would solve my issue?
