Hi,
I am not sure if my understanding is correct… so i post the question.
I have a house in France connected to the grid with a 12kVA power capabilities. I am currently thinking about having a backup solution based on Multiplus and batteries only in case of power failure(s).
But, the 12kVA, is required only because I have an EV vehicle. So in case of powerfailure, the idea is not to power the EV charging system, only the house where consumption is usually below 3kVA.
So, If I took a 5kVA multiplus (which is not able to power the 12kVA), would it be able to pass the 12kVA when the grid is available (and provide power assist if required, but should not as I never go above 10kVA…), splitted between the AC1 and AC2 output? In this case, AC2 will be mainly dedicated to EV charging system as it should be down in case of grid failure.
In this case, when if the grid is done, I will be limited to 5kVA on AC1.
Is my assumption correct: when grid available I can go up to 17kVA on both AC outputs, and when grid is down, it is limied to 5kVA on AC1 output?
Thanks a lot
Nicolas
The transfer switch is rated to a max 50A, no more.
Just put the EV in parallel to the inverter at AC IN, and your critical loads on AC OUT.
Ah!
This was the parameter I was missing. This means with 230V input, 11,5kVA maximum (need to take care of potential limitation within temperature or time).
Also, I don’t know why, I didn"‘t think to put EV charging system in parallel of the Multiplus instead of plug to AC2. In case of grid failure, the EV charging won’t be powered in this case by Multiplus, correct?
Thanks a lot for the feedback!
Correct, and you still have the option to use an energy meter and backfeed power from battery to the EV for peak shaving.