question

allen-dengler avatar image

Victron and Fronius AC Couple

I am aware that there is a 1 to 1 rule for a Fronius AC couple, I understand that you shouldn't put a larger Fronius than Victron, but can I put a smaller Fronius than the Victron. I have a 15KVA Victron system and I would like to add a 5KVA Fronius as the AC Couple connected to the AC1 output. Would this be a problem as you don't get a 15KVA single phase Fronius and the roof space I have for the panels for the Fronius is not large, it can take 12~18 535watt panels

Froniusquattro 10kva
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2 Answers
Mike Dorsett avatar image
Mike Dorsett answered ·

No problem with the smaller Fronius inverter. The 1:1 rule gives you the MAX solar inverter size - the Victron inverter needs to be able to absorb the total output from the solar inverter, in the case where there are no other ac loads.

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marekp avatar image
marekp answered ·

No problem with smaller Fronius, but do not forget to load PV inverter assistant (or ESS assistant) for frequency shift control of Fronius by Victron charger.

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