The Epoch 72V 105Ah LiMax Series (Model: BB72105A KIT) is a complete lithium battery conversion kit designed for 72-volt golf cart applications. This LiFePO4 battery system offers 7.392 kWh of energy storage and includes a 72V 15A lithium charger, battery gauge, and 12V converter for auxiliary power needs.
This 72V lithium battery kit features a 105Ah capacity at a nominal voltage of 70.4V. The system is built with prismatic LiFePO4 cells in a 1P22S configuration, providing an operating voltage range of 55.0V to 79.2V. The steel-encased battery measures 21.7" L x 13.4" W x 9.9" H and weighs 132 lbs, offering significant weight reduction compared to traditional lead-acid battery banks.
Key Features
- Complete lithium conversion kit for 72-volt golf cart systems
- 7.392 kWh energy storage capacity
- Weight: 132 lbs (270-370 lbs lighter than lead-acid equivalent)
- 3,500+ rated charge cycles
- IP67-rated enclosure protection (dust and water resistant)
- Bluetooth connectivity for mobile monitoring via app
- Over-the-air firmware updates
- M8 female terminal type for straightforward connections
- Maximum of two batteries in parallel connection
- Prismatic LiFePO4 cell chemistry
- Built-in Battery Management System (BMS)
- 11-year warranty
Product Specifications
| Specification |
Value |
| Model |
BB72105A KIT |
| Nominal Voltage |
70.4V |
| Nominal Capacity |
105 Ah |
| Energy Stored |
7.392 kWh |
| Chemistry |
LiFePO4 |
| Cell Configuration |
1P22S |
| Operating Voltage Range |
55.0V - 79.2V |
| Weight |
132 lbs |
| Dimensions (L x W x H) |
21.7" x 13.4" x 9.9" |
| Case Material |
Steel |
| Enclosure Protection |
IP67 |
| Terminal Type |
M8 Female |
| Life Cycle |
3,500+ Cycles |
| Self-Heating |
No |
| Bluetooth |
Yes |
| Software Updates |
Yes (Over-the-air) |
| Series/Parallel Connections |
Max (2) in Parallel |
| Parameter |
Value |
| Max Continuous Discharge |
250A |
| Max Discharge 15 Sec |
500A |
| Max Discharge 2 Sec |
1,000A |
| Discharge Temperature Range |
-4°F (-20°C) to 140°F (60°C) |
| Parameter |
Value |
| Max Continuous Charge |
100A |
| Max Charge 15 Sec |
500A |
| Bulk/Absorption Voltage |
78.1V - 79.2V |
| Absorption End Condition |
Stop when charge current ≤C/20 or 15 min max |
| Float Voltage |
Disabled (preferred) or 73.3V - 74.8V |
| Re-bulk Voltage |
72.6V |
| Temperature Compensation |
0mV/°C (none) |
| Equalization |
Disabled |
| Charge Temperature Range |
32°F (0°C) to 131°F (55°C) |
| BMS High Voltage Cutoff |
79.2V |
| SoC Recalibration |
79.2V |
| Charge Rate |
50% of battery or battery bank capacity |
| Parameter |
Range |
| Discharge Temperature |
-4°F (-20°C) to 140°F (60°C) |
| Charge Temperature |
32°F (0°C) to 131°F (55°C) |
| Recommended Storage Temperature |
32°F (0°C) to 95°F (35°C) |
| Battery Charge Temperature Range |
32°F (0°C) to 131°F (55°C) |
| Battery Discharge Temperature Range |
-4°F (-20°C) to 140°F (60°C) |
| Cell Charge Temperature |
32°F (0°C) to 131°F (55°C) |
| Cell Discharge Temperature |
-4°F (-20°C) to 140°F (60°C) |
| Certification |
Status |
| UL 1642 (Cells) |
Certified |
| UL 9540A (Cells) |
Certified |
| IEC 62619:2022 |
Certified |
| CE |
Compliant |
| RoHS |
Compliant |
| Shipping Classification |
UN 38.3 |
What's Included in the Kit
- 72V 105Ah LiFePO4 Battery (BB72105A)
- 72V 15A Lithium Charger
- Battery Gauge
- 12V Converter
- Bluetooth App Connectivity (iOS & Android)
Frequently Asked Questions
Compatibility and Installation
Q: Is this battery compatible with my 72V golf cart?
A: This battery is designed for golf carts that operate on 72-volt electrical systems. Verify your cart's voltage before ordering. The maximum parallel connection is two batteries.
Q: Can I install this battery myself?
A: Installation involves removing old batteries and connecting the new lithium battery pack. Basic electrical knowledge is recommended. Ensure all connections are secure and observe proper polarity. The M8 female terminals are designed for straightforward connection.
Q: Can I connect multiple batteries?
A: The system supports a maximum of two batteries in parallel connection.
Charging
Q: Can I use my existing charger?
A: You can use your existing charger if it can be programmed for the specified voltage parameters: bulk/absorption at 78.1V-79.2V and float at 73.3V-74.8V (if used). The included 72V 15A lithium charger is pre-programmed with the correct settings.
Q: How do I properly charge this battery?
A: To properly charge this battery, verify that your charging component is capable of being programmed for bulk/absorption voltage of 78.1V-79.2V, with absorption ending when charge current stops or after 15 minutes maximum. Float voltage should be disabled (preferred) or set to 73.3V-74.8V. Temperature compensation should be set to 0mV/°C (none), and equalization should be disabled.
Q: How long does it take to charge?
A: With two batteries in parallel, the absorption time is 30 minutes at 200Ah. Actual charge time depends on depth of discharge and charger output. The included 15A charger will take longer than higher-amperage chargers.
Q: Can I use a different charger amperage?
A: Yes, the battery supports up to 100A continuous charge (50% of battery capacity). Higher amperage chargers will reduce charge time if they can be programmed to the correct voltage parameters.
Q: What is the charge rate?
A: The recommended charge rate is 50% of the battery or battery bank capacity.
Performance and Lifespan
Q: How long does the battery last?
A: The battery is rated for 3,500+ charge cycles. Actual lifespan depends on usage patterns, depth of discharge, and operating conditions.
Q: Will this improve my golf cart's performance?
A: The reduced weight (270-370 lbs lighter than lead-acid) and consistent voltage output can improve acceleration, hill climbing, and overall efficiency. The lithium battery maintains voltage throughout the discharge cycle, unlike lead-acid batteries that experience voltage sag.
Q: How much energy does this battery store?
A: The battery stores 7.392 kWh of energy (7,392 Wh).
Weight and Physical Specifications
Q: What is the weight difference from lead-acid batteries?
A: This lithium battery weighs 132 lbs, compared to 400-500 lbs for an equivalent 72V lead-acid battery bank, resulting in a weight reduction of approximately 270-370 lbs.
Q: What are the dimensions?
A: The battery measures 21.7" L x 13.4" W x 9.9" H.
Maintenance and Care
Q: Does the battery require maintenance?
A: LiFePO4 batteries require minimal maintenance. No watering, no equalization, and no terminal cleaning are needed. The BMS handles cell balancing automatically.
Q: What is the recommended storage temperature?
A: The recommended storage temperature range is 32°F (0°C) to 95°F (35°C).
Operating Conditions
Q: What is the operating temperature range?
A: The battery operates in temperatures from -4°F (-20°C) to 140°F (60°C) for discharge and 32°F (0°C) to 131°F (55°C) for charging.
Q: Is the battery waterproof?
A: The battery has an IP67 enclosure rating, providing protection against dust and temporary water immersion.
Monitoring and Features
Q: How do I monitor the battery?
A: The battery includes Bluetooth connectivity for monitoring via a mobile app available for iOS and Android devices. A battery gauge is also included in the kit.
Q: What is the self-heating feature?
A: This battery does not include a self-heating feature, as indicated in the specifications.
Q: Can the firmware be updated?
A: Yes, the battery supports over-the-air firmware updates.
Safety and Certifications
Q: Is this battery safe?
A: LiFePO4 chemistry is inherently stable compared to other lithium chemistries. The battery includes a battery management system with built-in protections and meets UL safety certifications.
Q: What certifications does this battery have?
A: The battery is certified to UL 1642 (Cells), UL 9540A (Cells), IEC 62619:2022, and carries CE and RoHS compliance. It ships under UN 38.3 classification.
Environmental Impact
Q: Is this battery environmentally friendly?
A: LiFePO4 chemistry contains no heavy metals such as lead or cadmium. The battery is rated for 3,500+ cycles, reducing replacement frequency compared to lead-acid batteries that typically last 500-1,000 cycles. The battery is fully recyclable and complies with RoHS environmental standards.
Warranty
Q: What warranty is included?
A: The battery comes with an 11-year warranty.
Cost Considerations
Q: Will I save money over time?
A: While the initial investment is higher than lead-acid batteries, the 3,500+ cycle life (compared to 500-1,000 cycles for lead-acid) means fewer replacements over time. Additionally, reduced maintenance requirements and improved efficiency can result in long-term cost savings.
