6
Expion360 Battery Manual, G24 and G27
Rev 2
07/18/2022
Series Installation:
Connecting multiple batteries in series will increase the battery bank’s energy capacity and voltage while maintaining
the charge and discharge rates of the battery system. Note that available watt-hours will increase while the amp-hour
capacity remains the value of the individual batteries and is not summed together as in the parallel configuration. Up to
(4) batteries may be series-connected to achieve 24, 36, and 48 Vdc systems. To further increase the battery bank’s
overall capacity, additional strings may be connected to a common bus bar.
Important: Any batteries wired in series using cables must be connected by cables of equal length and gauge (AWG).
1.2
Installation Diagram
Battery Terminal:
The depths of the female battery terminal threads are no more than 12 mm. Consider this when determining the proper
bolt length to secure bus bars, cable lugs, and any washers that will be affixed to the terminal connection pad. If too
much torque is applied to a bolt, the female threads of the battery terminal will be stripped and the damage will not be
covered under warranty due to misuse of the product. Consider the 12 mm thread depth when selecting your bolts so
that they do not bottom-out. Conversely, a minimum of 3 threads must be engaged before applying 8 lb-ft of torque so
as to not damage the threads.
Torque to 8 lb-ft (96 lb-in).
Do not finger-tighten. Do not overtighten. Check thread depth vs. bolt length. The female thread depth of the battery
terminals is 12 mm.
Prior to series installation, connect the batteries in parallel and fully charge to balance the batteries. For series-
connected battery banks, a battery balancing device is recommended as described in 4.2
