1. Introduction
Thank you for choosing the CyperOcean 12V 200Ah LiFePO4 Battery. This battery is designed for high-performance energy storage applications, offering exceptional lifespan and reliability. It features a robust Battery Management System (BMS) for comprehensive protection and supports expandable energy systems for various uses.
Our 12.8V 200Ah LiFePO4 battery offers an impressive 15,000+ deep cycles, lasting 30 times longer than traditional lead-acid batteries. Fully charged, the LiFePO4 battery delivers 2560Wh of energy with nearly 100% depth of discharge (DOD), ensuring reliable power for your devices.
Weighing only 57.54lb±3%/26.1kg±3% and measuring 20.63×9.65×8.66inch/524×245×220mm, the CyperOcean 200Ah lithium battery is 40% lighter than lead-acid batteries, making it easy to carry. It also has twice the usable capacity, saving space without compromising performance and maintaining high power.
The integrated BMS automatically cuts off charging in low-temperature conditions, preventing irreversible battery damage and ensuring longevity in extreme climates.
This battery is perfect for home energy storage, UPS backup, RVs, campers, golf carts, trolling motors, houseboats, solar systems, digital/CCTV cameras, DIY projects, and more. It is a versatile solution for both recreational and professional use.
2. Safety Information
WARNING:
- When connecting batteries in series or parallel, use a multimeter to measure the battery voltage. It must be ensured that the voltages of all batteries are consistent, or the voltage difference is less than 0.2V. Connecting batteries beyond this range is prohibited.
- The advanced Battery Management System (BMS) offers overcharge, over-discharge, overcurrent, and short-circuit protection.
- A high-temperature cut-off prevents charging above 158°F (70°C).
- The integrated BMS automatically cuts off charging in low-temperature conditions to prevent irreversible battery damage.
- Always ensure proper polarity when connecting the battery. Reverse polarity can cause severe damage and is not covered under warranty.

3. Package Contents
Please check the package contents upon receipt:
- Battery Unit x 1
- Screws (M8) x 4
- Plastic Insulation Caps x 2
- Technical Manual x 1
4. Specifications
| Content | 12V200Ah200 |
|---|---|
| Rated Voltage | 12.8V |
| Standard Charging Voltage | 14.4±0.2V |
| Nominal Capacity | 200Ah |
| Nominal Energy | 2560Wh |
| Maximum Continuous Charge Current | 200A |
| Maximum Continuous Discharge Current | 200A |
| Series & Parallel Connections | 4 Series (Max) 4 Parallel (Max) |
| Case Material | ABS+PC/UL94 V-0 |
| Ingress Protection Rating | IP65 |
| Storage Temperature | 32°F~140°F / 0°C~60°C |
| Battery Pack Certifications | IEC/CE/FCC/RoHS/UN38.3 |
| Dimensions | 20.63×9.65×8.66inch / 524×245×220mm |
| Weight | 57.54lb±3% / 26.1kg±3% |
| BMS | 200A |
| Bluetooth | No Support |

5. Setup
5.1 Series & Parallel Battery Connection
The CyperOcean 12V 200Ah LiFePO4 battery supports configurations up to 4 Series (4S) and 4 Parallel (4P). This allows for a maximum 4S4P configuration, enabling up to 51.2V 800Ah and a massive 40.96KWh energy system.
IMPORTANT: When connecting batteries in series or parallel, use a multimeter to measure the battery voltage. It is crucial that the voltages of all batteries are consistent, or the voltage difference is less than 0.2V. Connecting batteries beyond this range or with inconsistent voltages is prohibited and can damage the batteries.

Example (12.8V 200Ah battery):
- Series: Four 12.8V 200AH batteries connected in series will result in 51.2V 200AH.
- Parallel: Four 12.8V 200AH batteries connected in parallel will result in 12.8V 800AH.
- Max. Connection in Series & Parallel (4S4P): A 4S4P configuration of 12.8V 200Ah batteries yields 51.2V 800Ah.
6. Operating Instructions
6.1 General Usage
The CyperOcean LiFePO4 battery is designed for a wide range of applications, including RVs, marine boats, home energy systems, solar power storage, and off-grid solar power systems. Its robust design and advanced BMS ensure reliable performance.

6.2 Charging and Discharging
- Charging Temperature: 14°F - 131°F (-10°C - 55°C). The BMS will cut off charging if temperatures are outside this range.
- Discharge Temperature: -4°F - 140°F (-20°C - 60°C).
- The battery delivers 2560Wh of energy with nearly 100% Depth of Discharge (DOD).
- The maximum continuous charge and discharge current is 200A.

7. Maintenance
7.1 Storage Guidelines
- Charge the battery to 50% capacity before long-term storage.
- Disconnect all load connections when storing the battery.
- Store the battery in a dry, well-ventilated area.
- Maintain storage temperatures between 32°F~140°F (0°C~60°C), avoiding extreme heat or cold.
- Recharge the battery to 50% capacity every 3 months if stored long-term to prevent over-discharge.
7.2 Recycling & Disposal
Dispose of used batteries in compliance with local environmental regulations. Lithium-ion batteries are recyclable; please send them to designated recycling facilities instead of regular waste.
8. Troubleshooting
If you encounter issues with your CyperOcean LiFePO4 battery, consider the following:
- Battery Not Powering On: Check all connections for proper seating and polarity. Ensure the battery is adequately charged. The BMS may have activated a protection mode (e.g., over-discharge) if the battery was fully depleted.
- Battery Not Charging: Verify the charger is functioning correctly and is compatible with LiFePO4 batteries. Check charging temperature; the BMS will prevent charging if the temperature is too low (below 14°F / -10°C) or too high (above 158°F / 70°C).
- Reduced Performance: Ensure the battery is operating within its specified temperature ranges for discharge. If multiple batteries are in series or parallel, re-check that all battery voltages are consistent (within 0.2V difference).
- BMS Activation: The BMS will protect the battery from over-voltage, under-voltage (over-discharge), over-current, short-circuit, and extreme temperatures. If the battery suddenly stops functioning, it's likely a BMS protection has been triggered. Remove the load/charger and allow the battery to reset, or check the conditions that might have triggered the protection.
9. User Tips
- Installation is straightforward, and the battery provides excellent stability and safety for your electrical system.
- When connecting multiple batteries, always ensure proper voltage matching (within 0.2V difference) to prevent damage and ensure optimal performance.
- The integrated 200A BMS provides comprehensive protection, ensuring safety and longevity, making it a reliable choice for various applications.
10. Warranty and Support
10.1 Warranty Coverage
The CyperOcean 12V 200Ah LiFePO4 Battery comes with a 5-year limited warranty from the date of purchase.
The warranty does NOT cover:
- Improper installation, use, maintenance, or storage.
- Reverse polarity, short circuit, overcharging, or undercharging.
- External damage (impact, collision, drop) or unauthorized modification.
- Exceeding maximum series-parallel configuration (4S4P) or using with third-party products not approved by CyperOcean.
- Commercial use with 80%+ discharge depth within 24 hours, or long-term inactivity (over 1 year without charging).
- Damage caused by force majeure (fire, flood, earthquake, etc.).
10.2 Additional Resources
A detailed user manual in PDF format is available for download. Please refer to the official CyperOcean website for the latest version: User Manual (PDF).
For further support and information, please visit our website: www.cyperocean.com.
Renew Energy. Renew Life.