1. Introduction
This manual provides essential information for the safe and efficient operation of your KEPWORTH 24V 150Ah Lithium Iron Phosphate (LiFePO4) Deep Cycle Battery. Please read this manual thoroughly before installation and use to ensure proper handling and longevity of the battery. This battery is designed for various applications including solar energy systems, RVs, boats, motorhomes, trolling motors, and off-grid power backups.
Image 1.1: KEPWORTH 24V 150Ah LiFePO4 Deep Cycle Battery, front view, showing brand and specifications label.
2. Key Features
- Group 8D Size Compatibility: Designed to fit the ubiquitous BCI Group 8D battery size standard, suitable for a wide range of vehicles and applications.
- Lightweight Design: Approximately 1/3 lighter than a traditional Group 8D AGM battery, offering enhanced portability and ease of installation.
- High Energy Density: Features an 8X Mass Energy Density (MED) and delivers 100% usable energy (3840Wh).
- Integrated 100A BMS: Built-in Battery Management System provides comprehensive protection against over-charging, over-discharging, over-current, and short-circuits.
- Low-Temperature Protection: Upgraded low-temperature cut-off function ensures safe operation and charging in cold environments.
- Automotive Grade Cells: Constructed with high-quality automotive grade lithium iron phosphate cells for superior performance, stability, and power output.
- Expandable System: Supports series and parallel connections for flexible energy expansion, suitable for home backup, off-grid systems, RVs, and marine applications.
Image 2.1: Diagram illustrating the 100A Smart BMS and its protective functions, including overcharge, overdischarge, overcurrent, short circuit, high temperature, and low temperature protection.
3. Setup and Installation
Before installation, ensure the battery is inspected for any physical damage. Always wear appropriate personal protective equipment (PPE) such as gloves and eye protection.
3.1 Unpacking and Inspection
Carefully remove the battery from its packaging. Check for any signs of damage during transit. If damage is found, do not proceed with installation and contact customer support.
3.2 Battery Dimensions and Terminal Specifications
The battery is designed to fit Group 8D battery boxes. Ensure your installation space accommodates the dimensions provided below. The battery uses M8 terminal bolts for secure connections.
Image 3.1: Detailed dimensions of the KEPWORTH 24V 150Ah LiFePO4 battery (L 520mm/20.47in, W 269mm/10.59in, H 220mm/8.66in) and M8 terminal bolt specifications.
3.3 Connection Guidelines
This battery supports both series and parallel connections to expand your energy system. When connecting multiple batteries, ensure all batteries are at a similar state of charge before making connections. Use appropriate gauge cables for your application to prevent overheating and voltage drop.
- For parallel connections, connect positive to positive and negative to negative.
- For series connections, connect the positive of one battery to the negative of the next.
- Always connect the load to the outermost terminals of the battery bank for balanced discharge.
Note: This battery is not intended for use as a car starting battery or golf cart battery.
4. Operating Instructions
4.1 Charging Parameters
For optimal performance and longevity, adhere to the recommended charging parameters:
- Recommended Charging Voltage: 29.2V
- Over Voltage Disconnect Voltage: 30V
- Float Charging Voltage: 29.2V
Recommended charging methods include solar panels (≥900W), a 29.2V LiFePO4 charger (10A-50A), or a generator.
Image 4.1: Visual guide for inverter settings (charge, over voltage disconnect, float charging, low voltage disconnect/reconnect) and recommended charging methods (solar, dedicated charger, generator).
4.2 Discharging Parameters
- Low Voltage Disconnect Voltage: 21.6V
- Low Voltage Reconnect Voltage: 24.8V
4.3 Low-Temperature Operation
The battery features an intelligent low-temperature cut-off protection. This system automatically stops discharging below -4°F (-20°C) and stops charging below 32°F (0°C). Charging will resume when the battery temperature reaches 41°F (5°C) or above.
Image 4.2: Illustration of the low-temperature cut-off thresholds: stop discharging below -4°F, stop charging below 32°F, and resume charging at or above 41°F.
4.4 Typical Applications
The KEPWORTH 24V 150Ah LiFePO4 battery is versatile and can be used in various applications:
- RV & Camping power systems
- Trolling motors and marine applications
- Home backup power solutions
- Solar energy storage systems
- Off-grid living setups
Image 4.3: Collage showing diverse applications for the KEPWORTH LiFePO4 battery, such as RVs, trolling motors, home backup, solar energy, and off-grid systems.
5. Maintenance
Proper maintenance ensures the longevity and performance of your LiFePO4 battery.
- Regular Inspection: Periodically check the battery terminals for corrosion or loose connections. Ensure all cables are securely fastened.
- Cleaning: Keep the battery surface clean and dry. Use a soft, damp cloth to wipe away dust or dirt. Do not use harsh chemicals or abrasive materials.
- Storage: If storing the battery for an extended period, it is recommended to charge it to 30-80% capacity. Recharge the battery every 3-6 months to prevent deep discharge and maintain cell health. Store in a cool, dry place away from direct sunlight and extreme temperatures.
- Charging After Deep Discharge: If the battery has been deeply discharged, recharge it within 12 hours to prevent potential damage.
6. Troubleshooting
This section addresses common issues you might encounter with your KEPWORTH LiFePO4 battery. The built-in BMS is designed to protect the battery from most common faults.
| Problem | Possible Cause | Solution |
|---|---|---|
| Battery not charging | Charger not connected, charger fault, battery temperature too low, BMS protection activated (over-discharge, over-voltage) | Check charger connection and functionality. Ensure battery temperature is above 32°F (0°C). If BMS protection is active, disconnect load/charger, allow battery to rest, and then attempt to charge with a compatible charger. |
| No power output from battery | Load too high, short circuit, battery deeply discharged, BMS protection activated (over-current, low voltage) | Reduce load. Check for short circuits in wiring. If deeply discharged, attempt to charge. If BMS protection is active, disconnect load, allow battery to rest, and then reconnect. |
| Battery capacity seems low | Inaccurate capacity reading, battery not fully charged, high discharge rate | Ensure battery is fully charged according to specifications. High discharge rates can temporarily reduce usable capacity. Perform a full charge/discharge cycle if possible to recalibrate. |
If the issue persists after attempting these solutions, please contact KEPWORTH customer support for further assistance.
7. Specifications
| Attribute | Value |
|---|---|
| Brand | KEPWORTH |
| Model Number | KEP24V150Ah520 |
| Nominal Voltage | 25.6 Volts |
| Nominal Capacity | 150Ah |
| Energy | 3840Wh |
| BMS Continuous Discharge Current | 100A (Built-in) |
| Dimensions (L x W x H) | 520mm x 269mm x 220mm (20.47in x 10.59in x 8.66in) |
| Weight | Approx. 70.5 lbs (32 kg) |
| Terminal Type | M8 Terminal Bolts |
| Cycle Life | 4000+ cycles (at 80% DoD) |
| Operating Temperature (Discharge) | -4°F to 140°F (-20°C to 60°C) |
| Operating Temperature (Charge) | 32°F to 113°F (0°C to 45°C) |
Image 7.1: Comparative chart highlighting advantages of KEPWORTH LiFePO4 battery over lead-acid batteries in terms of weight, wiring complexity, lifespan, deep cycle capability, and depth of discharge.
8. Warranty and Support
KEPWORTH products are manufactured to high quality standards. For warranty information and technical support, please refer to the warranty card included with your product or visit the official KEPWORTH website. Keep your purchase receipt as proof of purchase for any warranty claims.
For direct support, you may contact KEPWORTH Tech, the seller on Amazon.