1. Introduction
This manual provides essential information for the safe and efficient use of your JOSMA 48V 150Ah LiFePO4 Golf Cart Battery. This lithium iron phosphate battery is designed as a high-performance replacement for traditional lead-acid batteries, offering increased power, longer lifespan, and advanced monitoring capabilities. Please read this manual thoroughly before installation and operation.
2. Safety Information
Always observe the following safety precautions to prevent injury or damage to the battery and connected equipment:
- Do not disassemble, puncture, or modify the battery.
- Avoid exposing the battery to fire, extreme heat, or direct sunlight for prolonged periods.
- Do not immerse the battery in water or other liquids.
- Use only the provided 58.4V 18A charger for charging.
- Ensure proper ventilation during charging and operation.
- Keep out of reach of children.
- Wear appropriate personal protective equipment (PPE) such as gloves and eye protection during installation and handling.
- Ensure all connections are secure and correctly polarized (positive to positive, negative to negative).
3. Package Contents
Verify that all items are present in the package:
- 1 × JOSMA 48V 150Ah Lithium Golf Cart Battery
- 1 × 58.4V 18A Charger
- 1 × LCD Touch Monitor
- 1 × User Manual (this document)
- Screws & Accessories (M3 Screws*8, M4 Screws*8, M5 Screws*10, M8 Screws*2, Display Brackets)
4. Setup
4.1. Battery Installation
The JOSMA LiFePO4 battery is designed for easy replacement of existing lead-acid batteries in compatible golf carts. Its lighter weight (50% less than lead-acid) simplifies handling.
- Ensure the golf cart is powered off and disconnect the old battery system.
- Carefully remove the old lead-acid batteries.
- Place the JOSMA LiFePO4 battery into the battery compartment. The battery features mounting feet and comes with fixing buckles and screws for secure and stable installation.
- Connect the battery terminals: positive (red) to positive, and negative (black) to negative. Ensure all connections are tight and secure.
4.2. Charging the Battery
Use the provided 58.4V 18A charger to ensure optimal charging and battery longevity.
- Connect the charger to the battery's charging port.
- Plug the charger into a standard AC power outlet.
- The charger's indicator lights will show the charging status. A full charge typically takes approximately 6 hours.
- Once fully charged, disconnect the charger from the power outlet and then from the battery.
4.3. LCD Monitor & Mobile App Connection
The intelligent LCD monitor and mobile app allow real-time monitoring of battery information.
- LCD Monitor Installation: Use the provided bracket and screws to install the LCD monitor in a convenient location on your golf cart dashboard. Connect the monitor cable to the battery's dedicated monitor port.
- Mobile App Connection: Download the JOSMA battery monitoring app from your device's app store. Enable Bluetooth on your mobile device and pair it with the battery. Follow the in-app instructions to connect and view real-time battery data.
5. Operating Instructions
5.1. General Operation
The JOSMA 48V 150Ah LiFePO4 battery provides reliable power for various applications:
- Golf Carts: Compatible with popular brands like EZGO, Club Car, and Yamaha. Offers a maximum range of up to 70 miles on a single charge.
- Other Applications: Suitable for RVs, UTVs, boats, trolling motors, electric lawn mowers, camping setups, and solar energy systems.
5.2. Monitoring Battery Status
The LCD monitor and mobile app provide comprehensive real-time data:
- LCD Monitor: Displays battery percentage, voltage, current, capacity, and temperature.
- Mobile App: Offers detailed battery information, including charge/discharge status, cell balance, and protection alerts.
6. Maintenance
6.1. General Care
LiFePO4 batteries require minimal maintenance compared to lead-acid batteries:
- No watering or acid checks are required.
- Keep the battery terminals clean and free from corrosion.
- Ensure the battery case is free from physical damage. The high-strength cold-rolled sheet metal case provides robust protection.
6.2. Temperature Management
The battery features multi-stage temperature protection to ensure optimal performance and longevity:
- Charging Temperature: The battery can be charged between 32°F (0°C) and 131°F (55°C). If the temperature drops below 23°F (-5°C), the BMS automatically disconnects the charging circuit and resumes at 32°F (0°C).
- Discharging Temperature: The battery can be discharged between -4°F (-20°C) and 131°F (55°C). Discharge cuts off at -22°F (-30°C) and restores at -4°F (-20°C).
7. Troubleshooting
7.1. BMS Protections
The built-in 200A Battery Management System (BMS) provides multiple layers of protection:
- Overcharge Protection: Prevents the battery from being charged beyond its safe voltage limit.
- Overdischarge Protection: Prevents the battery from being discharged below its safe voltage limit.
- Overcurrent Protection: Protects against excessive current draw.
- Short-Circuit Protection: Automatically disconnects the battery in case of a short circuit.
- High Temperature Protection: Monitors and manages internal battery temperature to prevent overheating.
- Voltage Balance: Ensures all cells within the battery pack are balanced for optimal performance and lifespan.
7.2. Common Issues
- LCD Monitor Malfunction: If the LCD monitor does not display information or functions sporadically, first ensure all cable connections are secure. If the issue persists, the mobile app can be used as an alternative for monitoring battery status. Contact customer support if the monitor remains non-functional.
- Charger Issues: If the charger is not functioning, verify the power outlet is working and the connections to both the battery and the wall are secure. If the charger is defective, contact customer support for a replacement.
8. Specifications
| Feature | Specification |
|---|---|
| Brand | JOSMA |
| Model | JA-48150 |
| Nominal Voltage | 51.2 Volts (48V system) |
| Nominal Capacity | 150Ah |
| Energy Capacity | 7.68 kWh |
| Max Load Power | 10.24 kW |
| Continuous Discharge Current | 200A (BMS controlled) |
| Cycle Life | 6000+ cycles |
| Charging Voltage | 58.4V |
| Charger Output | 58.4V 18A |
| Charging Time (0-100%) | Approx. 6 hours |
| Battery Cell Composition | Lithium Iron Phosphate (LiFePO4) |
| Dimensions (D x W x H) | 9" x 26.2" x 13" |
| Item Weight | 125 pounds |
| Terminal Type | M8 Terminal |
| Case Material | High-strength cold-rolled sheet metal |
| Operating Temperature (Discharge) | -4°F to 131°F (-20°C to 55°C) |
| Operating Temperature (Charge) | 32°F to 131°F (0°C to 55°C) |
| Features | Built-in 200A BMS, Touch LCD Monitor, Mobile APP (Bluetooth), Multi-Stage Temperature Protection |
9. Warranty and Support
JOSMA provides a comprehensive 10-year after-sales service, which includes repairs and replacements. Additionally, the product comes with a 15-year warranty.
For any questions, technical assistance, or warranty claims, please contact JOSMA customer support. Our US-based warehouse ensures fast and efficient issue resolution, with responses typically provided within 24 hours.
Contact information can be found on the official JOSMA website or through your purchase platform.
