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rl78 avatar image
rl78 asked

Fronius Primo an MP2 ESS Grid resynchronisation

Hi There,


a question is bugging me:


assume the following setup:


MP2 5000 in ESS setting with Fronius Primo 4.6 (with 4.4kwp) on AC1

Fronius is set to MG50

pylontech battery


What happens when the Grid fails ? --> Multi is taking over and is regualting the Primo via Frequency.


So Far so good.


But when the battery is nearly full or full, and the grid is comming back online ?

I think the multi needs to synchronise back to the grid. It goes back to 50 Hz. But what will the primo do ? When the primo output power goes up and the battery is full and the grid is not yet connected via the ess relays ?

Will there be a DC Ripple problem an system shutdown ?


Best Regards


Ralf



ESSFroniusgrid parallel
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1 Answer
Rob Duthie avatar image
Rob Duthie answered ·

Hi Ralf

It will be all seemless in the transfer of grid power to battery power and back again to normal and the Micro grid will work as it should. just like a normal grid.

Have installed a few systems with the Fronius micro grid setup with Victrons multiplus2 inverters.

Regards

Rob D

NZ

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