S48-100LFP STACK-LV Parallel Battery Installation

Modified on Mon, 6 Apr at 7:05 PM

PARALLEL BATTERY INSTALLATION

Rolls S48-100LFP STACK-LV batteries can be combined in parallel to increase system capacity and power delivery. Rolls S48-100LFP STACK-LV batteries can support up to 8 battery modules in parallel and is certified to UL 9540 & UL 1973 and tested to the unit level standard of UL 9540A under the following product names with overall system

dimensions provided for reference.

Each unit comes with two (2) positive and two (2) negative 200A busbars. Included with LFP STACK BASE+TOP ASSEMBLY are two additional busbar combiners, each having 2x M8 lugs and 2x M8 threaded inserts, to attach external cabling. Please refer to the installation instructions for recommended installation order. Busbars must always be installed completely flush and parallel to the terminal or mating busbar to avoid potential high resistance contacts.

The following table highlights the maximum current rating for the noted system configurations. These must be noted on the label during installation, per the installation manual.

Note: Factory settings for current limits in closed loop communication are based on a 400A Busbar configuration (busbars are included in packaging). 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 (See installation instructions).

DO NOT install closed loop systems with a 200A (single) busbar configuration. Refer to firmware update instructions online or contact support if a 200A closed loop configuration is required.

Note: For optimal cell cycle life, current setpoints may be limited based on external environment, either at the charger or inverter/hybrid inverter. Refer to CHARGING GUIDELINES below for more details.

Note: Refer to the Communication Interface section for the parallel communication cable and external CAN/RS-485 connections.

WARNING: Series connection of Rolls S48-100LFP STACK-LV batteries is NOT supported. Connecting batteries in series will directly lead to BMS failure under numerous conditions, risking cell health and user safety, and will void the product warranty.