I am trying to figure out which setting limits my Multiplus charging the battery when I am also charging my car.
The MP is on phase 1 of my 3 phase system, the car charges on phase 3.
I have multiphase regulation setup to ‘Total of all phases’, and Peak Shaving to ‘Always’ 25A import and 25 export per phase (DESS also active, inverter max is set to 25A)
But this is not behaving like I would expect, in the picture below you see my battery starts charging (blue line), but when my car kicks in (white line) it stops charging, and instead starts discharging. When looking at the green line (total) I looks like its trying to keep the total to 25A instead of per phase. It stop discharging when it reached it min soc, and only resumed charging when the total dropped below 25A.
I would expect Peak Shaving to work on a single phase, and not the total.
Did you ever figure this out? I also need to do some load management when my 3ph car charger is operating and DESS decides to charge at the same time. I previously had some weirdness with peak shaving, and I need to try to get it working. Thanks.
No i didn’t really figure DESS out.. all I figured out was that DESS was doing stuff that I didn’t want it to do.
So now I still let DESS create schedules for me, but I trigger charging/inverting myself using External Control in node-red based on the schedule I pull from VRM.
This does exactly what I need, and saves me the complexities of writing my own schedules. Added bonus, when not charging/inverting I turn of the Multiplus and save an additional 30 watts.
That sounds like a nice solution. Too bad DESS reactivestrategy goes to “disabled” when DESS is disabled, at least when reading with MQTT from the Venus instance. I’ll need to dig into the MQTT channels to see if scheduling might still be available. Thanks!
