Hi,
I have got a Victron system since beginning of April 2025 and I am a real beginner in this community. And so far I am quite happy with the basics of Victron.
I am not happy with dynESS, but that is not my main problem now.
As we have 2 electric cars I want to control the charging mainly with the surplus power of my PV installation by controlling the 2 wallboxes of KEBA via Modbus TCP, which is actually very easy.
But to calculate the surplus power I need the Modbus register adress of the “critical loads”.
In the excel file CCGX-Modbus-TCP-register-list-3.50 I dont find the “critical loads”
Does anyone know how to get this data ?
my calculation of the surplus power will be very simple:
PV Power/Yield - 15% losses - Heat pump power (part of AC Loads) - Critical Loads (as shown on the dashboard) = Surplus Power (available power for charging electric cars)
Thanks in advance for any suggestions
Try these. You will have to add them up if you have three phase or split phase, otherwise just use L1. Unit ID depends on your setup, see the second sheet of the spreadsheet.
| com.victronenergy.vebus |
Output power 1 |
23 |
int16 |
0.1 |
-327680 to 327670 |
/Ac/Out/L1/P |
no |
VA or Watts |
Sign meaning equal to Output current |
| com.victronenergy.vebus |
Output power 2 |
24 |
int16 |
0.1 |
-327680 to 327670 |
/Ac/Out/L2/P |
no |
VA or Watts |
Sign meaning equal to Output current |
| com.victronenergy.vebus |
Output power 3 |
25 |
int16 |
0.1 |
-327680 to 327670 |
/Ac/Out/L3/P |
no |
VA or Watts |
|
oh, thanks, I didnt expect such a fast reply 
I havent thought of this one because of the unit “VA or Watts” but I will try this in the evening when I am back at home.
Also look at registers 878, 880, 882. Unit ID 100
I use these for my HomeAssistant integration, they are 32-bit (two registers each).
These are explicitly consumption on the AC Output.
| com.victronenergy.system |
Power on output of inverter/charger, L1 |
878 |
int32 |
1 |
-2147483648 to 2147483648 |
/Ac/ConsumptionOnOutput/L1/Power |
no |
W |
|
| com.victronenergy.system |
Power on output of inverter/charger, L2 |
880 |
int32 |
1 |
-2147483648 to 2147483648 |
/Ac/ConsumptionOnOutput/L2/Power |
no |
W |
|
| com.victronenergy.system |
Power on output of inverter/charger, L3 |
882 |
int32 |
1 |
-2147483648 to 2147483648 |
/Ac/ConsumptionOnOutput/L3/Power |
no |
W |
|
Hi Rick,
thanks for your help.
it seems that register 23–24-25 works fine for me. Quite accurate.
Also 878-880-882, but those values are following the consumption but are much lower values than 23-24-25 (20-30%) which I dont understand.
But for now I am happy
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