I have 2x Multiplus-II units I want to parallel. they are same vintage hardware. I have 5kw of AC coupled PV with Fronius, all currently working with one unit.
Q1. When both outputs are paralleled at the sub board, do I need to set one of the Multies to NOT close the earth neutral relay?
Q2 I have run in both Output cables and they are the same length, but the cable supplied only has a 2.5mmsq earth in the cable. So Iam thinking I need to run separate larger earths from the swb earth bar to both Multies. does this need to be the same lenght for both?
thanks in advance.
System is offgrid, however there is a change over switch to align the house to the Grid should there be a multiplus issue. Hence I need to use the Neutral Earth relay.