question

brianlee avatar image
brianlee asked

grid relay not closing

we have a 3phase supply, only using two of the phases. we have two Multiplus 2 48/5000/70,one on each phase with 10 x Pylontech us2000c batteries. we recently had a power cut and since then the mains AC in on the inverters won't come in. we also have a wind turbine fitted.

Also we have taken the inverters away and tested the grid relay offsite and its works fine, any ideas would be appreciated.

gridRelay
2 |3000

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1 Answer
Paul B avatar image
Paul B answered ·

so you are using 2 inputs l1 and out to load l1 on one inverter and l2 on the other with output going to load l2 .

so the outputs are not connected. so really each inverter is running as a single unit.

If so then there has to be a GX unit for each unit you cannot connect the two units VE.BUS connection together both to the same GX as a example.


so a wiring diagram of how its all connected would be helpfull.

(They can both run off the same battery bank. BMS control may become a issue depending on how the BMS is being controlled


remove all VE bus connections and see if it then works


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