The battery must be connected in permanence to the controller’s Red wire(s) or VMot terminal via a high-power emergency switch SW2 as an additional safety measure. Partially discharged batteries may not blow the fuse, while still having enough power left to cause a fire. Leave the switch SW2 closed at all times and open only in case of an emergency. Use the main On/Off switch SW1 for normal operation. This will prolong the life of SW2, which is subject to arcing when opening under high current with the consequent danger of contact welding.
BM, do you remember the part number of your relay? And I have some more questions:
1. When the relay is ON, does it consume power? If so, how much is its consuming power?
2. When the relay is OFF, does it consume power? If so, how much is its consuming power?
3. Is your relay wiring is similar as my picture above (just replace the red toggle switch by a momentary one)?
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