Morning,

 

Have a client who had two of the 3phase Mecer units installed in 2017. Its a office block.

Strange thing is none of the two has a parallel board installed.

The battery unit broke a while back and they been running grid tied. I was contacted to help see if all is well since the savings the client used to see does not appear on utility bill any more. I suspect excess PV is fed back to grid over weekends especially when the offices are closed.

The PV definitely works and feeds back to the loads. 

There is a Eastron SDM630M CT installed at distribution case. However the comms cable used to be connected to the battery which has a massive control board. Grid and PV runs the the battery unit. Now since teh battery does not work anymore I suspect comms arent working to the Eastron anymore and this will need to be connected to the Master inverter and then program set through the windows application interface?

 

The battery unit is an Austrian NEOSTARE FT3 DC Coupled. They went out of business a while back though.

Can these inverters be updated to parallel properly? Where can I get parallel boards if possible?

I would like to remove the whole battery unit and run inverters directly grid tied but if no parallel cards installed I'm afraid of the inverters feeding into each other.

 

Images for reference.

 

Edited October 26, 20232 yr by JoeSlow
Extra info

I contacted a company that can remove battery cells and package into a normal 5kwh enclosure with BMS. Contactors on the battery modules apparently are faulty but cells might still have some life left in them, which the company will confirm before re-packaging the cells.