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4.3
Battery Communications
Each EG4® battery is designed with you in mind, displaying as
much information as possible in the simplest manner. EG4®
Electronics includes the option of connecting the battery to PC
software to monitor the module status. This allows you to see and
understand exactly what the battery is doing as well as
troubleshoot if problems arise.
When a single battery is used, it will communicate directly with the
system via the RS485 or CAN port. The battery will connect via a
properly pinned battery communications cable (not included).
The communication cable from battery to battery is a
standard Cat5 cable. If you need a longer cable to reach from
your system to your master battery and would like to create
your own, please refer to the Communication Cable Pinout
Table in Section 5.3.2
4.3.1 Connecting multiple batteries in parallel
1. Ensure all battery breakers and BMS are OFF.
2. Set the address code of each battery according to the
DIP Switch ID Table (see Section 5.3.2: DIP Switch ID
Table), making sure there are no duplicate addresses.
3. Establish communication between the batteries via the
“Battery-Comm” ports starting with the right port on the
last battery address and terminating on the left port of
the host.
4. The battery with DIP Switch ID 1 (referred to as the
host) connects to the system via communication
cable using the RS485 or CAN port. (See image to
the right)
5. Power on each battery breaker and BMS ON/OFF switch
one at a time beginning with the host battery.
4.3.2 Communication Cable Pinout and DIP
Switch ID Tables
EG4®-LL-S batteries interface with an inverter by designating a
“Host” battery (DIP switch ID No. 1). The ID code range is 1‒64 (1
–16 for the 4 DIP model), and the communication mode can
support up to 64 modules in parallel (16 with the 4 DIP model).
Remember
If you have multiple batteries, all DIP switch settings must
be different from each other. This allows all equipment to
see each battery in the bank separately.
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