Wrong Calculation - Feed-in Values & Grid Consumption Values don't make sense (with a three phase - H3) inverter) !

[mafischerhei]

I think there must be something wrong with the calculation of values you get from a 3-phase setup:
At the moment I am consuming power from the net, but the values show:

Grid CT R - -98W
Grid CT S- -83W
Grid CT T- +54W
-> -127 (seems ok)

Grid Consumption R - +98W
Grid Consumption S - +83W
Grid Consumption T - +0W
-> 181 (Too much! exactly: 54 too much, should be 127)

Feed-In R - +0W
Feed-In S - +0W
Feed-In T - +54W
-> 54W (should be ZERO! or minus 127)

I think the "Grid CT" combined is plausible, the rest is not.

I think the calculation of the entities of "Grid Consumption" and "Feed-In" is calculated wrong in the code

it's NOT possible with 3-phases to just take the "positive" values (Grid Consumption / Feed-In) and ignore negative values. It always has to be a calculation (negative AND positive values).

I think there are only two ways to get correct values for this:

Either:
Allow negative values for feed-IN and Grid Consumption and keep R,S,T for those 6 entities:

Grid CT R - -98W
Grid CT S- -83W
Grid CT T- +54W
-> -127W

Grid Consumption R - +98W
Grid Consumption S - +83W
Grid Consumption T - -54W (!)
-> 127W

Feed-In R - -98W (!)
Feed-In S - -83W (!)
Feed-In T - +54W
-> -127W

OR:
simply using a combined entity in the code:
Grid Consumption (combined) - sum up all "Grid Consumption" no matter if they are positive or negative and then, make this value positive if negative or vice-versa (or make it Zero when it makes sense
Same for feed-in

What do you think, guys?

[canton7]

Which calculation exactly do you think is incorrect? We don't provide a "Grid Consumption", "Feed-in" or "Grid CT" entity for the H3.

[mafischerhei]

@TonyM1958 For me (3-phase setup) for the energy-dashboard, those sensors (already there) work perfectly :
Feed-in Total (foxess)
Grid Consumption Total (foxess)
Battery Discharge Total (foxess)
Battery Charge Total (foxess)
PV1 Power Total (foxess)
PV2 Power Total (foxess)

[mafischerhei]

@canton7

I guess the most obvious solution is to just remove Grid Consumption and Feed-in, but 1) people might be using them, so that's a breaking change, and 2) you can do that yourself by just disabling the entities.

Ok, now I understand your consideration.
Ok, I KNOW how to calculate everything I need out of the "Grid CT R S T" values.
It's just .. I am someone who likes things neatly in place.
I understand that its a breaking change.
So, maybe one solution would be giving 3-phase-setups ADDITIONALLY already combined sensors for "Feed-In R S T" and "Grid Consumption R S T", wouldn't clutter up home assistant of people already using those mention sensors.

But I understand If you have more important things to improve.

It's just a suggestion for improvement.

Anyway, thanks for having your plugin ,-))

[TonyM1958]

The total sensors are directly from the inverter and are worked out by the firmware. They are not calculated by the integration. Neither are the Today sensors. Just because you don't use the _daily sensors does not mean others don't. This is not a custom integration just for you...

[mafischerhei]

@TonyM1958
I think you misunderstood. It's good to have _daily sensors of course. It's clear that the total and today sensors are not calculated. I didn't question that.
I just wanted to answer your question what people should use for the dashboard, and
I can tell that total values work perfectly, because I use them for over a year now. (from various integrations)

[canton7]

@mafischerhei Can you please be a bit less shouty? We're all giving up our free time here, and having unpleasant interactions makes us disinclined to spend our time on this issue. Thanks!

[TonyM1958]

There are lots of side issues here you may not be aware with your specific configuration and this has already been discussed a lot.

To be clear, I am not using Nathan's integration currently (so the sensor name do not match), but the following code is offered as an example of something that has been run on H1, KH and H3 with main and solar inverters and the feedback is that it produces the correct load power when CT2 is correctly connected:

An untested use case is when multiple inverters are in Master / Slave setups. Here, it is not currently clear if the master reports the net power generated / consumed by the master + slaves or whether you need a second meter to report the power flowing into / out of the slave inverters in order to get the correct load power.

All of the power values are signed - no values are clipped, so the grid, ct2 and inverter powers can be both +ve and -ve.

On 3 phase, you see times where the inverter is importing on one phase and exporting on other phases due to the way it manages the current across the phases. For most people, 3 phase uses net metering (power values are summed across the phases) but there are issues where each phase is metered separately - which I think is the case in Hungary or Bulgaria (sorry, don't recall exactly).

'ct2_handling' is just a switch to give an option to ignore CT2 for debugging - usually CT2 is enabled in this template.

The final 0.3 just attempts to avoid -ve spikes in load power if there is a sampling error in the power values due to fast transients - by definition, load power cannot be negative.

Here's an example of what this looks like for single phase:

Hope this helps?

[canton7]

and the feedback is that it produces the correct load power when CT2 is correctly connected

What does "corectly connected" mean here? What is it connected to?

[mafischerhei]

On 3 phase, you see times where the inverter is importing on one phase and exporting on other phases due to the way it manages the current across the phases. For most people, 3 phase uses net metering (power values are summed across the phases

Isn't that exactly what I am saying? ( talking still about 3-phase setups):

How this integration gives out properties right now is like:
Grid CT R - -98W
Grid CT S- -83W
Grid CT T- +54W
-> -127 (seems ok) - correct

Grid Consumption R - +98W - correct for the single phase
Grid Consumption S - +83W - correct for the single phase
Grid Consumption T - +0W - correct for the single phase (not allowed to give "-" values), but:
all three phases summed up together -> 181 WRONG if you sum up together, I don't import THAT much.

Feed-In R - +0W - correct for the single phase (not allowed to give "-" values)
Feed-In S - +0W - correct for the single phase (not allowed to give "-" values)
Feed-In T - +54W - correct for the single phase, but:
all three phases summed up together -> 54W WRONG if you sum up together, because there's no export at all.

I think it should be on 3 phases calculated like this

Grid Consumption= Grid Consumption R + Grid Consumption S + Grid Consumption T (Letting allow negative or positive Results for the single phases, and then, AFTER calculation allow only positive values for the RESULT.
Would be in my case: (98)+(83)+(-54) = 127 , which would be correct.

That's why I am saying, if "Grid Consumption R S T" and "Feed-In R S T" , the single phases are not allowed to go negative , they're pretty useless for a 3-phase setup, because they have to be summed up before restricting the RESULT of the [calculation] from going negative.

[mafischerhei]

@TonyM1958 Thanks for the code. Brings me closer to calculating the correct Houseload
Where I live I would say I have a pretty typical configuration H3+Chint
Which side issues do I have? Not clear what you mean.

Is your example code about the Inverter Power or the Houseload? Asking because of the unique name in this example.

But I have a little trouble translating the example into the entities of this integration here:
sensor.eps_rpower
sensor.eps_spower
sensor.eps_tpower
are clear

sensor.rpower, sensor.spower, sensor.tpower would translate to sensor.foxess_inv_power_r/s/t
I assume?

sensor.grid_ct : Would that be the combination of sensor.foxess_grid_ct_r/s/t ? and if yes:
What would be the sensor.meter_r/s/tpower in this integration here?
Isn't it the same as sensor.grid_ct_r/s/t ?

we don't have single entities for ct1 / ct2 in this integration here. Do we?

[TonyM1958]

The code works on H1, KH and H3 inverters. The different sensors for these models are described here: https://github.com/TonyM1958/HA-FoxESS-Modbus/wiki/Modbus-Map.xls

The code that I use to configure the sensors for the different inverter models and the templates that you are copying is here: https://github.com/TonyM1958/HA-FoxESS-Modbus

[TonyM1958]

and the feedback is that it produces the correct load power when CT2 is correctly connected

What does "corectly connected" mean here? What is it connected to?

Correctly connected means it is measuring the output power that is being injected into the local grid supply from all secondary inverters and is attached the right way around.

[canton7]

Ah OK, you're assuming the presence of extra inverters

[TonyM1958]

Yes - or conversely, I'm not assuming extra inverters are not present!

[TonyM1958]

BTW - you only get CT2/Meter for H3 - there are no separate phases for this. So, the load power is only correct when you present it as a virtual single phase inverter.