I have EVCS connected on AC Out (Critical) - and it should be there for charging a car available all the time.
The problem is, the load made by charger is summarized with Critical Loads measurements - which is obvious, as it is the same AC Out.
I want to find a way - or suggest a feature - to be able have a two separate measurements on the dashboard. One for the “real loads” at home, second from EVCS.
We have a Total Consumption measurement available on the Dashboard and there should be summarized measurement displayed, but EVCS in my optionion would be more useful when excluded from Critical Loads measurement.
If you move EVCS to AC In and add external meter i.e ET340 between grid and EVCS/Rest of the system, you will see EVCS as AC Load and all in AC Out of Multis as Critical loads. Then you will have clear separation of the power taken by Critical vs “regular” (EVCS) loads. I did it as such to prevent EVCS from draining my batteries while EVCS was positioned on AC Out. I don;t care about EVCS unavailability due to grid failures while being on AC In - it happens so seldom…More over PV surplus also goes to EVCS instead of to grid, which is nice…
Moving to AC IN is not an option, as it will be not powered when I’m disconnected from the grid - and that is the purpose for the batteries in my case, to charge them during the day, discharge during the night, with charging my car included.
It should be “detached” by design when displayed. Everything we measure individually should be subtracted from AC Loads or Critical loads - as it is included in Total Consumption at the end.
@arekp , still you can discharge your batteries to EV while EVCS is positioned on AC In. Just specify in GX Settings->ESS> Self- Consumption from battery to “All system loads”
Arekp, with the full respect to you setup and leaving the metering aside for a moment : you are afraid your EV will not be charged during grid failure while being on AC In . I believe your EV is having much higher batt capacity then your backup batteries. Aren’t you afraid, that during night when the backup batteries discharge to your EV , the car will drain almost all capacity from your home bats ? What in case of grid failure following such a discharge ? Your home will go to blackout stage, as all power went to EV ? Back to meters: I can believe, that having separate meter on EVCS line and second one on remaining Critical loads , should give you two separate measurement in dashboard…
again, while setting up EVCS on AC In and setting ESS self consumption to All system loads, your home batts will charge your EV in case of grid failure. No difference between In or Out positioning. But IN gives you clear EVCS measurement separation from Critical
It will not. Multiplus is doing measurements on the OUT connectors. Having meters defined on the same OUT should have an option to subtract the measurements from the general measurements - option, because someone else may not need that. But If we define any number of meters for different roles - Heat Pump, EVCS or Generic AC Load - it would be nice to have it separated from general measurement of the Loads (Critical or AC, does not matter, that’s why we can define where meter is located and what role it plays).
Additionally we have Total Consumption on the Dashboard, which displays the sum of the Loads - AC, Critical and even Grid (if anything is connected before Multiplus).
There is a ‘hack’ that partially works: use a ‘virtual PV inverter’ in Node-RED connected to AC-out. If you feed it a negative current and power, the power will be subtracted from the other AC loads in VRM dashboard without adding to the solar power!. Unfortunately it still does get added to the power consumption history for no apparent good reason but at least the instantaneous dashboard readouts are much ‘rational’ this way.
I have started to document some of my (Node-RED based) modifications on my DESS trade test system, including this ‘hack’ to remove AC loads from a large additional battery charger that has to be on ACout-2 for safety and good system design requirements.
See here for more: UpCycle Hybrid DESS Trade - #6 by UpCycleElectric
Nice hack! Thx Jan. Adding this to consumption is reasonable - PV produced, not charged to batteries or exported, means consumed.
This not solves my problem - I believe that it’s more feature request now, not the issue that could be solved. But nice to meet someone who also think different
