WeCo Srl Italia
www.wecobatteries.com
4K4 PRO V 1.11 28-9-2021
If the inverters have properly identified the battery BMS model and Capacity, Turn OFF the system your connection is properly set up.
Always install cables in accordance with installation guidelines and avoid long cable runs to prevent excessive voltage drops
Fixing Torque
Screw
Diameter
(ISO)
Max Fixing
Torque
Application
Construction
Applied Torque
Code
[Nm]
[Nm]
M3
1.7
BMS protection Cover
1,2
M4
3.8
External Covers
3
M5
7.5
Isolators and Contactor Supports
7
M6
13
Fuses, Cables and Cable Lungs Connection to
Terminals /Feet /Brackets/ Wall Plugs
10
M8
14
Plastic to steel and Cables on Terminal Block / Feet /
Brackets / Wall plugs
14
M8
32
Steel on Steel Connection / Steel to copper/
Contactor terminal to Bus bar)
16
M10
62
External Bus Bar ( Aluminium and Copper) steel on
steel connection
40
M12
107
External connections, copper to copper joints
80
If during the quarterly check the screws will have residual torque lower than these values, it means that the cables and the
busbar are subjected to out-of-range currents and the thermal effect is loosening the screws / bolts
