Lynx Smart BMS Before closing the main power contactor, the BMS performs a short-circuit check on the load side by pre-charging any connected loads. It also monitors the current through the busbar’s shunt to prevent over-current situations that could damage cables or the battery. Reversing the power distribution requires specific configuration changes, as the load and source connections - and the current flow through the shunt - are reversed. The current shunt is a low-ohmic resistor, precisely factory-calibrated. User modifications to the shunt are not permitted, as even minor changes can introduce contact resistance and invalidate the calibration.
To compensate for the reversed current flow, a dedicated software setting is available. This must be configured via Bluetooth using the VictronConnect app, available from the Victron Energy website. Without these modifications, the Lynx Smart BMS will not function as intended. This procedure involves relocating the voltage sense wires on either side of the power contactor: 11.6.4. Wiring adjustment procedure Voltage sense wires involved: Red wire = Source voltage White wire = Load voltage Steps 1. Access the wiring area Remove the fan bracket from its holder and set it aside Do not disconnect the fan cables; the connector has limited mating cycles. 2.
Swap the wires Move the white wire to the left side For the Lynx BMS 1000A: On units with serial numbers before HQ2530, the white wire may be too short and will need to be extended. Move the red wire to the right side Use a 2.5 mm Allen key to loosen the screws, reposition the wires, and re-tighten them. 3. Secure the wiring Ensure screws are snug, but do not overtighten. Route the wires neatly along the bottom corner of the power contactor to avoid obstructing the fan bracket. Refit the fan bracket. 4. Check clearance Ensure the now-crossed wires do not block the internal light pipes. 5. Close the unit Refit the enclosure cover and tighten all screws before applying power.
Source and load voltage sense Swapped wires for reversed power distribution Page 47 Appendix