Renogy 12V 400Ah
Renogy REGO 12V 400Ah LiFePO4 Lithium Battery User Manual
Model: 12V 400Ah | Brand: Renogy
1. Product Overview
The Renogy REGO 12V 400Ah LiFePO4 Lithium Battery is a high-capacity, advanced power solution designed for RV, home, marine, and outdoor applications. With a 5.12kWh usable capacity, this battery offers significant power and an exceptional lifespan of over 3800 cycles. It features an extruded aluminum housing for durability and superior heat conductivity, along with die-cast lids for extreme temperature tolerance and enhanced electrical properties. The integrated Battery Management System (BMS) provides comprehensive protection and smart functionalities, including a built-in self-heating function for optimal performance in cold environments. This battery is designed to provide reliable and efficient backup power, enhancing your off-grid experiences.
Key Features:
- High Capacity: Single 5.12kWh usable capacity, reducing installation footprint compared to multiple smaller batteries.
- Advanced BMS: Offers over 60 types of warnings and protections, precise cell balancing, and stores up to 150 event records for enhanced reliability and safety.
- Intelligent Self-Heating: Automatic heating function ensures stable charging performance and extends battery lifespan in low-temperature conditions.
- Mobility Application Design: Road load tested to EV battery standards, ensuring stable performance under mechanical vibrations. BMS with RV-C protocol for seamless integration with RV systems.
- Certified Quality: Road load simulation tested with cells holding IEC62619, UN38.3, IEC82820, UL1973, and other certifications.

2. Safety Information
Please read and understand all safety instructions before installing or operating the Renogy REGO 12V 400Ah LiFePO4 Lithium Battery. Failure to follow these instructions may result in electric shock, fire, serious injury, or death.
General Safety Precautions:
- Always wear appropriate personal protective equipment (PPE), including safety glasses and insulated gloves, when working with batteries.
- Do not short-circuit the battery terminals. This can cause severe damage to the battery and pose a fire hazard.
- Ensure all connections are tight and secure to prevent loose connections, which can lead to overheating and damage.
- Do not expose the battery to open flames, excessive heat, or direct sunlight for prolonged periods.
- Keep the battery away from water and other liquids unless specifically designed for submersible use (this product is IP65 rated, but avoid submersion).
- Do not disassemble, puncture, or modify the battery in any way. Internal components are not user-serviceable.
- Store the battery in a cool, dry, and well-ventilated area, away from flammable materials.
- In case of fire, use a Class D fire extinguisher (for lithium-ion fires). Do not use water.
- Dispose of the battery according to local regulations. Do not dispose of with household waste.
Charging and Discharging Safety:
- Only use chargers specifically designed for LiFePO4 batteries.
- Do not overcharge or over-discharge the battery. The built-in BMS provides protection against these conditions.
- Operate the battery within its specified temperature ranges for charging and discharging. The self-heating function assists in cold conditions.
3. Package Contents
Upon opening the package, please verify that all items are present and undamaged. If any items are missing or damaged, contact Renogy customer support immediately.
- 1x Renogy REGO 12V 400Ah LiFePO4 Lithium Battery
- 1x User Manual (this document)
- (Cables and other accessories may be sold separately or included depending on the specific kit purchased.)
4. Setup and Installation
Proper installation is crucial for the safe and efficient operation of your Renogy REGO battery. It is recommended that installation be performed by a qualified professional.
4.1 Site Selection
- Choose a location that is clean, dry, well-ventilated, and protected from direct sunlight, moisture, and extreme temperatures.
- Ensure the mounting surface is sturdy enough to support the battery's weight (approximately 118 pounds).
- Maintain adequate clearance around the battery for ventilation and ease of access for connections and maintenance.
4.2 Mounting the Battery
The Renogy REGO battery is designed with an extruded aluminum housing and is IP65 waterproof, making it suitable for various applications, including mobile setups. Secure the battery firmly to prevent movement during operation, especially in RV or marine environments where vibrations are common.

4.3 Electrical Connections
The REGO battery system is designed to simplify installation, potentially reducing the number of cables required compared to traditional setups. Refer to the wiring diagram specific to your system configuration (RV, marine, off-grid home) for correct connections.
- Ensure all power sources are disconnected before making any electrical connections.
- Connect the battery to your charge controller, inverter, or other system components using appropriately sized cables and connectors.
- Pay close attention to polarity (positive to positive, negative to negative) to avoid damage to the battery or connected equipment.
- Tighten all terminal connections to the recommended torque specifications to prevent loose connections and potential overheating.
- The battery's BMS supports RV-C protocol, allowing for seamless integration and communication with compatible RV systems.

5. Operating Instructions
The Renogy REGO battery is designed for intelligent and reliable operation, featuring a sophisticated Battery Management System (BMS) and self-heating capabilities.
5.1 Initial Activation and Charging
- After installation, ensure all connections are correct and secure.
- Initiate charging using a compatible LiFePO4 charger. The BMS will manage the charging process, ensuring optimal cell balancing and protection.
- The battery's 5.12kWh capacity provides substantial power for various appliances, as illustrated below.

5.2 Intelligent Self-Heating Function
The battery is equipped with an intelligent self-heating function that automatically activates in low-temperature environments. This ensures the battery remains within its optimal charging temperature range, preserving performance and extending its lifespan.
- The self-heating function operates automatically when the battery temperature drops below a certain threshold, typically around 32°F (0°C).
- This feature allows for stable charging performance even in cold conditions, down to -4°F (-20°C) for discharge.
- The battery is designed to perform optimally in a wide temperature range, from -4°F to 131°F (-20°C to 55°C) for discharge.

5.3 Battery Management System (BMS)
The advanced BMS is the brain of the REGO battery, providing comprehensive protection and smart features:
- 150 Event Records: The BMS logs up to 150 events, which can be accessed for diagnostics and troubleshooting.
- Accurate Battery Cell Balance: Ensures all cells are balanced for optimal performance and extended lifespan.
- RV-C Protocol: Enables communication with compatible RV systems for integrated monitoring and control.
- Thermal Management: Actively manages battery temperature to prevent overheating or overcooling.
- 60+ Types of Protections: Includes over-charge, over-discharge, over-current, short-circuit, over-temperature, and under-temperature protections.

5.4 Monitoring with the Renogy App
The REGO battery includes a built-in Bluetooth module, allowing you to monitor its status conveniently from your smartphone using the Renogy DC Home App. This provides real-time data and control over your battery system.
- Download the Renogy DC Home App from your device's app store.
- Enable Bluetooth on your smartphone and open the app.
- Follow the in-app instructions to pair with your REGO battery.
- Monitor battery voltage, current, state of charge, temperature, and access event records.

6. Maintenance
The Renogy REGO LiFePO4 battery is designed for minimal maintenance, but periodic checks can help ensure its longevity and optimal performance.
6.1 Regular Checks
- Visual Inspection: Periodically inspect the battery for any signs of physical damage, corrosion on terminals, or loose connections.
- Connection Integrity: Ensure all cable connections are clean, tight, and free from debris.
- Environment: Verify that the battery's operating environment remains within recommended temperature and humidity ranges.
6.2 Cleaning
- Clean the battery casing with a dry or slightly damp cloth. Do not use harsh chemicals or abrasive cleaners.
- If terminals show signs of corrosion, clean them carefully with a wire brush and apply a thin layer of dielectric grease to prevent future corrosion.
6.3 Storage
- If storing the battery for an extended period, ensure it is charged to approximately 50% State of Charge (SOC).
- Store in a cool, dry place, away from direct sunlight and extreme temperatures.
- Periodically check the battery's SOC during storage and recharge if it drops significantly.
The Renogy REGO battery is built with advanced cells designed for maximum battery life, offering an impressive 6000 life cycles under optimal conditions.

7. Troubleshooting
This section provides guidance for common issues you might encounter with your Renogy REGO battery. For more complex problems, refer to the Renogy DC Home App for event records or contact customer support.
| Problem | Possible Cause | Solution |
|---|---|---|
| Battery not charging | Loose connections, charger malfunction, battery in protection mode (e.g., low temperature, over-discharge). | Check all cable connections. Verify charger operation. If temperature is low, allow self-heating to activate. Check BMS event records via app. |
| Battery not discharging / No power output | Over-discharge protection, over-current protection, short-circuit, loose connections. | Check load for short circuits or excessive current draw. Recharge the battery if it's in over-discharge protection. Verify connections. |
| Unusual sounds or smells | Internal fault, overheating. | Immediately disconnect the battery from all loads and charging sources. Contact Renogy customer support. Do not attempt to open the battery. |
| Bluetooth connectivity issues | Bluetooth disabled on device, app issues, battery too far. | Ensure Bluetooth is enabled on your phone. Restart the Renogy DC Home App. Move closer to the battery. Check for app updates. |
The BMS records up to 150 events, which can be a valuable tool for diagnosing issues. Access these records through the Renogy DC Home App.
8. Specifications
Detailed technical specifications for the Renogy REGO 12V 400Ah LiFePO4 Lithium Battery.
| Attribute | Value |
|---|---|
| Model | 12V 400Ah |
| Battery Type | LiFePO4 (Lithium Iron Phosphate) |
| Nominal Voltage | 12 Volts |
| Nominal Capacity | 400 Amp Hours (Ah) |
| Usable Energy | 5.12 kWh |
| Life Cycles | 6000+ cycles (0.5C Charge/Discharge, 25°C, 80% DOD, 80% EOL) |
| Item Weight | 118 pounds |
| Product Dimensions (L x W x H) | 28 x 15 x 18 inches |
| Housing Material | Extruded Aluminum |
| Ingress Protection (IP) Rating | IP65 (Waterproof) |
| Operating Temperature (Discharge) | -4°F to 131°F (-20°C to 55°C) |
| Operating Temperature (Charge) | 32°F to 113°F (0°C to 45°C) - Self-heating extends lower limit |
| BMS Features | Cell Balancing, Over/Under Voltage Protection, Over/Under Temperature Protection, Over Current Protection, Short Circuit Protection, RV-C Protocol, Event Records |
| Connectivity | Bluetooth Module for App Monitoring |
| Certifications | IEC62619, UN38.3, IEC82820, UL1973, FCC |
9. Warranty and Support
Renogy is committed to providing high-quality products and excellent customer service. Your REGO 12V 400Ah LiFePO4 Lithium Battery comes with a manufacturer's warranty, ensuring peace of mind in its long-term usage.
9.1 Product Certifications
The REGO 12V 400Ah Lithium battery has undergone rigorous testing and obtained various international certifications, including IEC62619, UN38.3, IEC82820, UL1973, and FCC Certificates. These certifications attest to the product's safety, reliability, and performance standards.

9.2 Customer Support
For technical assistance, warranty claims, or any questions regarding your Renogy REGO battery, please contact Renogy Customer Support. Have your product model number and purchase date ready when contacting support.
- Renogy Official Website: Visit the official Renogy website for FAQs, support resources, and contact information.
- Online Support: Many common issues can be resolved by consulting the online knowledge base or community forums.
- Contact Information: Refer to the Renogy website or your purchase documentation for the most current contact details (phone, email).
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