S48-100LFP STACK-LV: Cable Connections, Torque, and Balancing

EXTERNAL CABLE CONNECTION

All external cable connections should be adequately sized, insulated, and undamaged. The cable connectors should be clean and properly mated with the battery terminals to ensure a snug connection. Terminal connections should be torqued to the recommended specification below. Although Rolls S48-100LFP STACK-LV batteries do not require maintenance, routine inspection of cabling and terminal connections is recommended.

Note: Undersized cables may lead to cable and/or battery damage, charging issues, terminal heating, or fire. The above table is only meant to provide a quick reference, ALWAYS consult with the manufacturer’s specification for conductor current and temperature.

Terminal Torque

Terminal connections must be properly torqued. Rolls S48-100LFP STACK-LV battery terminals using M8 fasteners should be torqued to 4-6 Nm. 

DO NOT OVERTORQUE: If a terminal is damaged, do not attempt to repair the

terminal. Do not use the battery if the recommended torque specification cannot be met.

Note: Each of the four terminals on the S48-100LFP STACK-LV module has a

maximum current limit of 200A. For all installations, code compliance, and adherence to

certifications, installation of the four (4) supplied busbars, connected on the two (2)

positive terminals & two (2) negative terminals, per battery, is required.

Manual Balancing

If an imbalance is present between connected batteries, this may cause a large inrush

current between batteries after they are finally energized in parallel. To avoid

performance problems if batteries are unable to connect to the system:

    1. Individually, or in groups based on voltage and state of charge, charge each

battery by one of two means:

        a. Leave batteries you do not wish to charge off and with disconnected breakers when charging batteries                            individually.

        b. Following the one stage charge recommendations.

        c. Following the automatic recommendations based on the connected closed loop inverter system.

    2. Once they have been individually charged, continue with the connection steps as listed above.