The Epoch 48V 105Ah Lithium Iron Phosphate (LiFePO4) golf cart battery complete conversion kit (Model BB 51100A) is manufactured by Epoch Batteries. We are an authorized dealer of Epoch Batteries products. This kit provides 51.2V nominal voltage (48V system) with 100Ah nominal capacity (5.12kWh total energy) and is designed for golf cart conversions from lead-acid to lithium battery systems.

This complete kit includes the battery, 15A lithium charger, LCD battery meter, 48V to 12V voltage converter, Bluetooth monitoring capability, and cart-specific mounting hardware for Club Car, EZGO, and Yamaha golf carts.

Technical Specifications

• Manufacturer: Epoch Batteries
• Model Number: BB 51100A
• Chemistry: Lithium Iron Phosphate (LiFePO4)
• Cell Configuration: 1P16S (16 cells in series, 1 parallel string)
• Nominal Voltage: 51.2V
• Nominal Capacity: 100Ah @ 0.2C
• Nominal Energy: 5.12kWh @ 0.2C
• Bulk/Absorption Voltage: 57.0V
• Float Voltage: 54.0V or OFF
• End of Discharge Voltage (Inverter/Load cutoff): 41.6V
• Battery Low Voltage Disconnect (BLVD): 40.0V
• Re-connect Voltage: 48.0V
• Dimensions: 18.1" L × 13.4" W × 9.8" H (460mm × 340mm × 250mm)
• Weight (without accessories): 99 lbs (45kg)
• Maximum Continuous Discharge Current: 200A
• Peak Discharge Current: 300A @ 15 seconds, 700A @ 2 seconds
• Recommended Discharge Current: 150A
• Maximum Charge Current: 100A continuous (300A @ 15 seconds peak)
• Recommended Charge Current: 50A
• Short Circuit Protection: 1100A @ 500μs
• Charge Temperature Range: 0°C to 55°C (32°F to 131°F)
• Discharge Temperature Range: -20°C to 60°C (-4°F to 140°F)
• Storage Temperature (≤6 months): 0°C to 35°C (32°F to 95°F)
• Storage Temperature (≤1 month): -20°C to 55°C (-4°F to 131°F)
• Recommended Storage Environment: 15°C to 35°C (59°F to 95°F), 5% to 75% RH
• Cycle Life: >3,500 cycles @ 80% DOD (per manufacturer specifications)
• End of Life Capacity: 80% of initial capacity after 3,500 cycles
• Self-Discharge Rate: ≤3% per month (battery in sleep or power-off mode)
• Internal Impedance: ≤20mΩ @ 50% SOC, 1kHz
• Parallel Configuration: Maximum 2 batteries in parallel
• Communication: Bluetooth, CAN, RS485
• Firmware Updates: Over-the-air (OTA) updates available via Bluetooth app (iOS and Android)
• Terminal Type: M8 bolt
• Terminal Torque: 8-12 N·m
• IP Rating: IP67 (dust-tight and waterproof to 1 meter for 30 minutes)
• Operating Altitude: <3,000 meters
• SOC at Shipment: Approximately 50% (per manufacturer recommendation)

Battery Management System (BMS) Features

This battery includes a built-in Battery Management System with the following manufacturer-specified protections:

• Over-charge protection (prevents charging above maximum voltage)
• Over-discharge protection (automatic cutoff at 41.6V inverter/load, 40.0V BLVD)
• Over-current protection for charge (100A continuous limit) and discharge (200A continuous limit)
• Short circuit protection (1100A @ 500μs response time)
• High temperature protection during charge (cutoff at 55°C) and discharge (cutoff at 60°C)
• Low temperature charge protection (prevents charging below 0°C)
• Cell voltage monitoring and balancing
• Automatic re-connect at 48.0V after low voltage disconnect
• Bluetooth monitoring via mobile application (iOS and Android)
• CAN and RS485 communication protocols

Complete Kit Components

This conversion kit includes the following components:

• Epoch BB 51100A 48V 100Ah LiFePO4 Battery: IP67-rated enclosure with integrated BMS (1 unit)
• 15A 48V Lithium Battery Charger: Specifically designed for LiFePO4 charging (1 unit)
• LCD Battery Meter: Displays battery state of charge (1 unit)
• 48V to 12V Step-Down Converter: Powers 12V accessories in golf cart (1 unit)
• Bluetooth Monitoring App: Compatible with iOS and Android devices (download required)
• Cart-Specific Mounting Brackets: Custom brackets for your golf cart model

Golf Cart Compatibility

This conversion kit is compatible with 48V golf cart systems from the following manufacturers:

• Club Car: 48V models
• EZGO: 48V models (TXT, RXV, and other 48V systems)
• Yamaha: 48V models

Important: This kit is designed for golf carts that originally use 48V lead-acid battery systems (typically six 8V batteries). Verify your golf cart operates on a 48V system before purchase. Different cart models may require different mounting brackets. Please specify your cart's make and model when ordering to ensure correct mounting hardware is included.

Recommended Charge Settings

For the Included 15A Charger:

The included charger is pre-programmed with the correct charge parameters for this Epoch LiFePO4 battery. No additional programming is required.

For Aftermarket or Alternative Chargers (per Epoch Batteries specifications):

• Bulk/Absorption Voltage: 57.0V
• Float Voltage: 54.0V or OFF (disabled)
• Recommended Charge Current: 50A
• Maximum Charge Current: 100A continuous, 300A @ 15 seconds peak
• Temperature Compensation: None (not required for LiFePO4 chemistry)
• Equalization: Not applicable (disable if charger has this setting)
• Charge Temperature Range: 0°C to 55°C (32°F to 131°F) only

Important Charging Notes:

• Use only lithium-compatible chargers designed for LiFePO4 batteries
• Do not charge below 0°C (32°F) or above 55°C (131°F)
• Not all chargers support multi-stage charging - verify your charger can be programmed for the specifications listed above
• Consult your charger's manual or contact the charger manufacturer for programming instructions
• Charge battery promptly (within 2 days) when battery is fully discharged
• For optimal battery health, fully charge battery once per month to correct SOC calibration

Installation Requirements

This conversion kit is designed for installation by golf cart owners with basic mechanical skills. Installation process includes:

• Removal of existing lead-acid batteries (typically six 8V batteries totaling 48V)
• Installation of included mounting brackets specific to your cart model
• Mounting of Epoch 48V 100Ah lithium battery using provided hardware
• Installation of 48V to 12V step-down converter for accessory power
• Installation of LCD battery meter in dashboard or accessible location
• Connection of battery cables using M8 terminals (torque to 8-12 N·m)
• Pairing of Bluetooth app with battery for monitoring

Safety Warning: Professional installation is recommended if you are not comfortable working with electrical systems. Improper installation may void warranty coverage and can result in battery damage or injury. Follow all safety warnings in the manufacturer's installation manual. Do not reverse battery polarity during installation.

Applications

This battery conversion kit is designed for the following applications per manufacturer specifications:

• Golf Course Use: Personal golf carts used on golf courses
• Neighborhood Transportation: Golf carts used in residential communities, retirement villages, and gated communities
• Commercial Applications: Resort shuttles, warehouse transport, facility maintenance vehicles, and other commercial uses on golf cart platforms
• Recreational Use: Hunting, camping, property maintenance, and other recreational applications using 48V golf cart vehicles

Performance Characteristics

According to Epoch Batteries test data, this battery provides the following performance characteristics:

• Capacity Retention: ≥96% capacity retention after 28 days storage @ 25°C (per manufacturer testing)
• Low Temperature Performance: ≥60% capacity @ -20°C for 6 hours, ≥80% capacity @ 0°C for 6 hours (compared to 25°C baseline)
• High Temperature Performance: ≥95% capacity @ 55°C for 4 hours (compared to 25°C baseline)
• Cycle Life Testing: >3,500 cycles @ 80% DOD, 0.2C charge/discharge rate, 25°C ambient temperature, with 80% capacity remaining at end of life
• Internal Resistance: ≤20mΩ @ 50% SOC measured at 1kHz

Storage and Maintenance

Storage Requirements (per Epoch Batteries specifications):

• Store battery at approximately 50% state of charge
• For storage up to 6 months: 0°C to 35°C (32°F to 95°F)
• For storage up to 1 month: -20°C to 55°C (-4°F to 131°F)
• Recommended storage conditions: 15°C to 35°C (59°F to 95°F), 5% to 75% relative humidity
• If not using for extended periods, charge battery every 6 months per manufacturer specifications
• Store in dry, clean, dark, well-ventilated indoor environment
• Keep away from heat sources, high voltage, direct sunlight, water, fire, and corrosive chemicals

Maintenance:

• Zero routine maintenance required (no water filling or equalization needed)
• Fully charge battery once per month to calibrate state of charge indicator
• Charge promptly (within 2 days) when battery is fully discharged
• Keep battery terminals clean and tight (8-12 N·m torque on M8 bolts)
• Inspect connections periodically for corrosion or looseness

Safety Warnings

Per Epoch Batteries safety documentation, observe the following warnings:

• Keep battery away from heat sources, high voltage, and direct sunlight
• Never throw battery into water or fire
• Never reverse positive and negative terminals
• Never connect positive and negative terminals with conductor (short circuit)
• Never impact, throw, or apply force to battery
• Never disassemble battery without manufacturer's permission and guidance
• Never mix batteries of different capacity, brand, or age
• Stop using immediately if battery emits odor, heats excessively, deforms, or shows abnormality
• Keep battery away from children and pets
• In case of electrolyte leak, avoid contact and seek medical attention if exposed (see manufacturer documentation for emergency procedures)
• Use carbon dioxide fire extinguisher (not water) in case of battery fire

Transport and Handling

Per manufacturer requirements:

• Do not shake, impact, or squeeze battery during transportation
• Prevent exposure to sun and rain during transport
• Handle carefully - prevent dropping, rolling, or heavy pressure
• Transport at close to 50% state of charge
• Store upright (face up) - do not stack more than 6 layers high

Important Note: We are an authorized dealer of Epoch Batteries products. This battery is covered by Epoch Batteries' manufacturer warranty. Complete warranty terms, conditions, and manufacturer contact information are available in the Warranty tab above. The manufacturer's technical datasheet is available in the Resources section of this product page.