Hi
I think I could be using DESS but problem is that I do not want to use my battery for EV charging during nights. So is there a way to disable discharge during night hours ? Cheapest hours are usually between 00-06 and that is the time slot I do EV charging too. I do not want DESS to consder this as usual consumption.
If you connect your wallbox to AC-IN, you could advice the system to only support critical loads, so it won’t discharge battery to cover the EV needs.
I have mine connected to AC-OUT as well, because I want to be able to charge in “emergency situations” as well. I’ve therefore written a script, called “NoBatToEV” that will handle this on a software level.
I will share that with the community in a couple of days / few weeks if you may be interested in it.
Is it a Victron charger?
Let me clarify I bit further. I have connected MP II purely parallel to my grid system together with solar inverter. Nothing connected to AcOut. Grid is very stable no need to worry about it. Grid and solar are externally measured and connected to MP II. Unfortunately I do not have Victron EV charger (yet). It is not either possible to manage it by any means, just to set max charging current by dip switches. However I see it very simple solution to deny discharge by a schedule, it could be used elsewhere too. Same logic as scheduled charging in ESS. I understand this could work in smaller proeject like boat or RV but wihin a family house it is a bit problematic to use DESS as it is. Other problem is sauna heating element, we use sauna heaters typically 6kW but it is not as big problem as EV as sauna heating takes like 1-2hours where EV charging will last 6hours or more with constant full power.