12.8V 100Ah Custom LiFePO4 Battery Pack | 26650 4S27P

A 1.28kWh Metal-Cased Pack with CAN and RS485

This 12.8V 100Ah custom LiFePO4 battery pack combines a 26650 4S27P cell arrangement with a metal enclosure and integrated communication functions. Rated capacity is 100Ah at C5, with 97Ah minimum capacity and approximately 1280Wh nominal energy.

The specified body measures (320 ± 2) × (172 ± 2) × (225 ± 3)mm and weighs 15.26 ± 0.4kg. The reference photo shows a black case, folding handle, terminal covers and a monitoring lead. The enclosure dimensions exclude projecting connectors, handles and other accessories.

Datasheet Values for the 12.8V 100Ah Build

Electrical Strengths of the 26650 4S27P Build

• 100Ah capacity in a 12.8V platform. Approximately 1.28kWh nominal energy supports an initial energy budget; delivered runtime depends on the equipment load, temperature and discharge conditions.
• CAN and RS485 interfaces. The communication provision allows the host-interface requirements to be reviewed alongside the power connection. Protocol details must match the equipment.
• M8 terminal interfaces and a metal case. These define the mechanical and power-connection design; use the full drawing to plan mounting, terminal access and cable routing.
• Defined cycle-life endpoint. The specification states at least 2000 cycles with at least 80% retained capacity under its standard charge/discharge procedure.

How This Build Differs from Its Siblings

Compared with the 12.8V 80Ah 32700 4S13P pack, this build provides 100Ah capacity, a 26650 4S27P arrangement and a metal enclosure with CAN/RS485 communication. The different weight, dimensions and interfaces require a separate installation review.

Duty, Charge and Temperature Limits

• Normal and time-limited discharge. Normal current is 50A. The separate 50-200A range is limited to 20 minutes or less. Confirm the actual duty cycle and cooling before using the upper range.
• Charging. Use 14.4 ± 0.15V with current no greater than 30A. The parameter table gives a 1-2A charge cut-off current. Charge only from 0°C to 45°C.
• Operating environment. Discharge from -20°C to 60°C. Provide ventilation and heat dissipation above 45°C; avoid water ingress and condensation.
• System topology. The supplied specification prohibits connecting complete packs in series or parallel. Use this build within its stated configuration.
• Cycle testing. Standard testing uses 25 ± 2°C and 65 ± 20% RH, the specified charge/discharge limits and C5 reference current. The cycle procedure includes 0.5-1 hour rests between charge and discharge.

Connecting the M8 Terminals and Communication Interfaces

The power interfaces are specified as positive and negative M8 holes. The device-monitoring entry names an XT90-IM plug with a 200 ± 15mm lead; CAN and RS485 are listed separately as communication functions. Match the complete interface drawing before assembling a harness.

1. Identify the positive and negative terminals from the case markings and approved drawing.
2. Select matching terminal hardware, conductor size and fastening torque for the application; the supplied sheet does not state a torque value.
3. Confirm the monitoring connector and communication pinout, including CAN-H/CAN-L and RS485 A/B, against the approved drawing. Do not infer contact numbers from a photograph.
4. Agree the communication protocol, message definitions, baud rate and host requirements before equipment integration.
5. Mount the case securely, protect the terminals and provide clearance for the handle, covers and leads.

Devices That Match This Discharge Profile

Potential applications include OEM backup-power assemblies, stationary DC equipment and industrial systems designed around a 12.8V LiFePO4 supply with CAN or RS485 monitoring. Check the full input-voltage range, 50A normal load, approved limited-duration demand and 15.26kg reference mass against the equipment design.

Technical Support & Model Matching

Send Surlon Power the device voltage range, continuous and time-limited load profile, runtime target, enclosure drawing, connector requirements and charging arrangement. Quote the Surlon website model SL-LFP-12.8V-100AH-4S27P when discussing this configuration. Review the proposed specification and an equipment sample before production approval. Explore the Custom LiFePO4 Battery Packs range for other reference builds.

FAQ