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djibi avatar image
djibi asked

Multiplus and fronius

Hello everyone, I want your help for this .

I want to use Fronius primo 3K and multiplus 800Va to avoid injection. SO my question is that the fronius primo 3K can be put on the AC out of the multiplus 800VA, for me it is impossible since the fronius output is bigger than the multiplus 800Va.


Any suggestion are welcome.

Fronius
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wkirby answered ·

You are correct. You cannot connect a PV inverter on AC-OUT which is more powerful than the MultiPlus. This is known as the factor 1.0 rule.

https://www.victronenergy.com/live/ac_coupling:start#the_10_rulemax_pv_power_must_be_equal_or_less_than_the_va_rating_of_the_multi


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djibi avatar image djibi commented ·

Thanks.


But can i connect other inverter like Sma or Goodwe to the multiplus?

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Guy Stewart (Victron Community Manager) avatar image Guy Stewart (Victron Community Manager) ♦♦ djibi commented ·

The same 1:1 limit applies for all AC solar inverters connected to AC output of the Multiplus.

It’s best to use a DC MPPT to add more solar to small inverter chargers.

Another option, if grid connected, is to put AC solar on AC input and user an energy meter.

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