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Craig avatar image

Multiplus 2 mains input and generator

I have a customer with an older 3kw Grid connect solar system. We want to connect a Multiplus 2 with a lithium battery as a piggyback on the mains AC buss with an energy meter (multiplus intput on mains buss). The output of the multiplus we want to connect to essential house services. Any excess solar that would normally be exported will be used to charge the battery and run essential services, the grid will not be used to charge the battery. When the grid is down for extended periods the customer wants to be able to connect a generator to the multiplus input to run essentials and charge the battery. My question is, with minimal user intervention, how can I tell the multigrid it is ok to charge from the generator? it doesn't know if it's connected to the grid or a generator, it's not allowed to charge from the grid, but is from a generator? All I can find is the charge current control assistant, but I think this will interfere with the excess solar charge.

MultiPlus Quattro Inverter ChargerGeneratorcharger
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Hi Craig, How did you get on with this setup? We have a customer wanting the same solution and I believe it will be getting more and more popular... Very keen to know how you got on.

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Paul B avatar image
Paul B answered ·

The correct solution is to have a Quattro unit

however there is a few ways to do this I THINK but you would need to get a victron distributor involved in your area

ie you could install a CCGX unit and then activate the Generator autostart feature that would activate on a mains failure trigger, you would have to manually turn this off as there is no way to know when the grid comes back on, (it may even be possible to have a sensor on the mains to turn off as well MAYBE that is)

this would then control TWO contractors that connect the generator to AC1 and disconnect the Grid, after a set period of time ie 10 min or however long you want to wait.

Now the system would know that the generator is connected

you would then have to program an assistant or a ess system to control the charging when on generator.

NOTE I have not done this sort of thing myself but I believe this could work for you. with some mucking around and thus be close to automatic.


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