Hi,
my Multi RS Solar has 2 nuts on the battery connector. From Bottom to top:
Where i have to put the cable lug? Normaly i would remove the frist nut and place it between PCB and the washer, then secured bei snap ring and nut. But why are there 2 nuts? I think its not a good idea to have a nut between pcb and cable lug…
Yeah this also went against what i am comfortable with
It goes between the two nuts not flat on the pcb.
Manual describes using an insulated spanner (to hold the bottom nut) while torquing the top nut.
As an FYI i tried it and the dc ripple is affected negatively mounting against the pcb.
Don’t worry about contact.
The nuts used are wide type, so the contact area around the nut (highlighted below) is more than 35mm^2, the necessary for the maximum current of 100A.
M8 means 8mm diameter, that multiplied with PI, gives us 25mm circumference. The section is 2mm wide, meaning a surface of 50mm^2 of contact.
My batteries are switched off during installation.
Is the following procedure correct?
Remove the first nut, snap ring and washer. Put on cable lug, put on washer and snap ring, hold lower nut with wrench, tighten upper nut with 14 NM and copy the torque with the wrench on the second nut so that it does not affect the PCB.
Are the nuts made of a good conductive material?
The procedure is correct.
You worry too much… 
Enjoy the product. 
This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.
