Hi: Can the Multi-plus II be used to shift solar energy captured in batteries to a different time of day when it is grid-tied?
asked
Can Multi-plus II be used to energy shift when grid-tied?
to be honest that's exactly his job ;)
However, you will ideally need a control unit, such as a Venus GX. And the MP-2 only works on one phase, if you want to balance the power across all three phases, you still need a 3-phase wattmeter.
Then your setup should look something like the attached picture.
Best regards
Hannes
Thanks so much for your reply. I have a north american 240V split-phase requirement. Some questions I have:
1 - If I parallel (2) MP-2 units for the split-phase requirement, do I still need a watt meter?
2 - Does the energy shifting current go through the AC Out 1 or 2, or does it go back through the AC In (from grid)?
3 - If the energy shifting current goes through the AC Out(2), then I will have to put the loads directly onto the AC Out(s), I am guessing. In this case, what is the maximum current that the MP-2 will pass-through AC current from AC In, so that it goes directly to the loads?
Thank you!
Chris
Hi, unfortunately I don't know exactly what an American 240V split phase requirement is. Maybe you can make a little sketch ;)
To 1:
I would always recommend the watt meter. E.g. the EM340. This gives you a very good overview of your network entry point and the two MP2 can also compensate for all phases over both.
To 2:
In the simplest case, the power goes back into the grid via the AC-IN. So you only need one connection cable for the power. You can use AC-OUT 1 for emergency power operation. In the event of a power failure, this is completely disconnected from the grid (AC-IN) and then operated as an island grid. I think the switching time is less than 25ms, so it's also a great UPS.
To 3:
I'm not entirely sure here, but I wouldn't conduct more than 3000VA through it.
Best regards Hannes
Also need to check if the MultiPlus that you want to use is type approved for US grid tied operation.
Check for certificates here: https://www.victronenergy.com/support-and-downloads/certificates
