DISCOVER ELEMENT - Parallel Module Installation; Parallel Module Installation Steps

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NOTICE
• Some inverter-chargers support temperature-compensated charging. Disable
temperature compensated charging on the charger or inverter.
• Do not use or install a battery temperature sensor.
9.7 Parallel Battery Module Installation Procedure
CAUTION
FIRE HAZARD
Use cables that meet specifications. Undersized cables can become hot and may
potentially catch fire.
Failure to follow these instructions can result in minor to moderate injury.
Battery modules used in a parallel system must meet the following requirements:
1. Same model. Battery modules must be the same model.
2. Equal voltage. The battery module has a Pre-Charge System that allows you to
connect battery modules at different SOC. The best practice is to confirm battery
modules are within 50 mV (0.05 V) of each other before installing them in parallel.
Battery cables connecting to the DC bus must meet the following requirements to
optimize performance:
1. Minimum cable length. Select a location that minimizes the length of battery
cables to reduce voltage drop from the impedance.
2. Equal cable gauge. The interconnection cables should be the same gauge.
3. Equal cable length. The interconnection cables should be of equal length.
9.7.1 Installation Procedure
CAUTION
ELECTRIC SHOCK AND FIRE HAZARD:
• Take precautions to avoid bridging the terminals.
• Do not contact the terminals with metal mountings, fixtures, or body parts.
Failure to follow these instructions can result in minor to moderate injury.
Install equipment following the standards set by the local authority having
jurisdiction.
1. If the circuit where the battery modules are installed has a disconnect, open the
disconnect to isolate the battery modules.
2. Set all battery BMS to the OFF position.
3. Set all battery Breakers to the OFF position.
4. Use a DMM or other voltage measuring device to confirm the circuit is de-
energized.
5. Ensure the cable connections are clean and in working order.
6. Install and secure new battery modules.
7. Connect the ground strap between each battery module and the chassis ground.