question

fabrizio-baglio avatar image
fabrizio-baglio asked

ac coupling fronius 5kw ac input connected and 5kw ac output connected

hi guys

my actual system is a simple grid-tied single phase 5kw fronius primo with 7kw of panels. im in the process of adding another 5kw fronius primo, a multiplus ii 48v/5000/50-70 and 200ah battery bank. i would connect one fronius to the multiplus in the ac input and the second fronius to ac output of the multiplus. the multi will be connected to the main panel and the battery bank.

will this setup work?

will i keep feeding the grid all the excess energy?

is the rule 1:1 met as the fronius on the ac output is 5kw?

Will 4mm2 wire be ok or i need bigger wires (the distance beetween inverter and grid is about 4mt)


thanks

FroniusAC PV Coupling
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1 Answer
Daniel avatar image
Daniel answered ·

Yes sure will work, 5kv fronius on the AC output. If your fronius have wifi on them both connect them to same network as the cerbo GX and it will find them, if no wifi then you will ET112 energy meters and USB to RS485 then in the ESS menu just tick feed AC Excess in to feed back in to grid.

4mm should be fine on 5kva at 4 meters

1to1 is right as the multi needs to be able to handle push backs.



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