Hey everyone! I've recently set up a system with two 12kw Deye hybrid inverters connected in parallel to a 100kWh battery pack, setting me up for an on-grid solution. I'm looking into how I can tap into my EV's V2L function to charge these batteries when solar power isn't cutting it. I briefly considered connecting the V2L output from my electric vehicle to the generator input on the Deye inverter, but it seems that the inverters require a three-phase generator, which isn't compatible. Another option I've thought about is using a Victron Multiplus II 48V charger connected in parallel with the hybrid inverters on the battery packs, but that seems risky since it wouldn't communicate with the battery's BMS. Are there other methods or solutions I might have missed that could help me utilize my EV's V2L to charge the household batteries? For reference, I have both a Kia EV6 and an MG4, and while V2L is supported, I've also seen tests showing that V2G works on the MG4, even though it isn't officially listed.
2 Answers
If the inverter doesn't support the setup, I recommend finding a separate charger that matches your battery's voltage and can handle the output from your V2L. It should connect to the batteries or busbar like any other charger. Just keep an eye on potential issues—like over voltage—because your BMS should ideally regulate that. Just to note, the V2L charger will deliver a max of 3600W from your EV6 and 2200W from the MG4, so if your household battery is heavily discharged and your EV is pumping out 2200W, make sure it won’t clash with what the inverter is trying to draw.
You might want to look into using a variable frequency drive. That could help in managing the connection better. Another idea is to set up a system that disconnects the charger when your batteries are almost full based on their voltage or by using data from the BMS.