Coupling up a generator to MulitiPlus II

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ianod asked Mar 26, '19

Coupling up a generator to MulitiPlus II

I am wanting to connect a generator onto the Multiplus II. The question I have is whether the generator will (i) charge the batteries or (ii) feed the dedicated selected prioritized circuits only or (iii) try and pick up the entire load usually fed by the utility?

I have a 5 KVA Multiplus II unit , 6 x solar panels controlled via MPPT and 2.4Kw/h li-lon battery. The diesel generator is 5 KVA. (I don't want an auto start generator function but rather a manual start). The Generator is only a back up for extended power outages that the PV and batteries cannot sustain

Multiplus-II Generator

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Answer 1 · 2019-03-26T12:34:29Z

Guy Stewart (Victron Community Manager) answered · Mar 26, 2019 at 12:34 PM

Hi Ianod,

The generator power will first be prioritised to the loads by the multiplus, if there is additional available capacity, it will then also charge the batteries.

You can limit the generator with the AC input current limit setting so as not to overload it.

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ianod commented · Mar 28, 2019 at 09:50 AM

Thanks Guy ..

1. Will the generator supply all loads or only the prioritized loads?

2. A change over / isolator will be needed in order to switch over from utility power to generator power (in the event of power outage) thereby giving protection to the system when the utility power comes back on

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Lyndsay Cotton ianod commented · Apr 03, 2021 at 09:03 AM

Just remember that a 5KVa generator will supply much less depending on amongst other things, the alternator, altitude derating (rating of genset is normally at sea level), engine HP etc. Your 5KVa could possibly deliver as little as 3400W.

So your input current limit should be set accordingly

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Answer 2 · 2019-03-28T10:51:04Z

Paul B answered · Mar 28, 2019 at 10:51 AM

The generator will supply all loads that are connected to AC1 out and AC2 out,

this is the way the standard unit is configured, this can be changed using assistants etc.

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ianod commented · Mar 30, 2019 at 10:00 AM

Thanks Paul

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