Deye BOS-G 5.12kWh High-Voltage LiFePO₄ Battery Module
The Deye BOS-G is a high-voltage lithium iron phosphate energy storage system designed for scalable solar and backup power installations where large capacity, high efficiency, and long service life are essential. Unlike low-voltage wall-mount batteries, the BOS-G system is engineered as a rack-mounted, high-voltage battery architecture intended for multi-module operation under continuous load conditions.
Each BOS-G battery module provides 5.12kWh of energy storage at a nominal module voltage of 51.2V and is designed to be connected in series to form a high-voltage battery string.
High-Voltage Modular System Architecture
The BOS-G system operates by stacking multiple battery modules in series within a dedicated rack cabinet. This allows the system voltage to scale from 153.6V up to 614.4V depending on the number of modules installed.
Minimum configuration starts at 3 modules in series, while standard system configurations typically use 8 or 12 modules per cluster, forming system voltages suitable for high-power hybrid and commercial inverters.
This architecture reduces current flow, improves system efficiency, and enables large-scale energy storage without excessive cabling losses.
System Capacities and Configurations
Depending on configuration, the BOS-G system supports the following typical setups:
• 3 modules: 15.36kWh system energy
• 8 modules: 40.96kWh system energy
• 12 modules: 61.44kWh system energy
Usable energy is based on 90% depth of discharge under standard operating conditions.
LiFePO₄ Chemistry and Long-Term Reliability
The BOS-G uses lithium iron phosphate (LiFePO₄) cells selected for high thermal stability, low self-discharge, and excellent cycle life. The system supports shallow and deep cycling with no memory effect and can remain on standby for extended periods without degradation.
The battery is rated for more than 6000 cycles at 25°C with 90% depth of discharge, supporting long-term daily cycling in demanding environments.
Intelligent BMS and Cell Protection
An intelligent Battery Management System actively monitors and balances current and voltage across all cells. Protection functions include over-charge, over-discharge, over-current, and over-temperature protection.
The system automatically manages charge and discharge states while maintaining cell balance to extend battery lifespan and ensure safe operation under variable loads.
High-Voltage Operation and Inverter Integration
The BOS-G system is designed for use with high-voltage hybrid and commercial inverters. Communication is provided via CAN2.0 and RS485 interfaces, allowing coordinated energy management, accurate state-of-charge reporting, and controlled charging and discharging behaviour.
USB, WiFi (optional), and remote firmware upgrades are supported for system maintenance and compatibility updates.
Rack-Mount Installation and Physical Design
Battery modules are designed to fit into a standard 19-inch rack system, allowing fast installation and straightforward maintenance. The system is intended for indoor installation in dedicated battery rooms, plant rooms, or technical enclosures.
Indicator LEDs provide visual feedback for system power and alarm states.
Technical Specifications – Deye BOS-G Battery Module
Battery Module Identity
- Brand: Deye
- Series: BOS-G
- Module energy: 5.12 kWh
- Cell chemistry: LiFePO₄
Electrical Ratings (Per Module)
- Nominal voltage: 51.2 V
- Capacity: 100 Ah
- Energy: 5.12 kWh
System Electrical Parameters
- System nominal voltage range: 153.6 V to 614.4 V
- System operating voltage range: 124.8 – 700 V
- Recommended charge/discharge current: 50 A
- Nominal current: 100 A
- Peak discharge current: 125 A (2 minutes at 25°C)
Environmental and Physical
- Installation type: 19-inch rack-mounted system
- Protection rating: IP20
- Operating temperature: Charge 0°C to 55°C, Discharge -20°C to 55°C
- Storage temperature: 0°C to 35°C
- Humidity: 5% – 85% RH
- Altitude: ≤2000 m
Lifecycle and Certification
- Recommended depth of discharge: 90%
- Cycle life: ≥6000 cycles
- Manufacturer warranty: 10 years or rated lifecycle energy throughput
- Certifications: CE, IEC62619, UL1973, UL9540A, UN38.3
FAQ
Frequently Asked Questions About the Deye BOS-G Battery
Is the Deye BOS-G a low-voltage battery?
No. The BOS-G is a high-voltage battery system designed for series connection of modules to form system voltages above 150V.
Can a single BOS-G module be used on its own?
No. The BOS-G is designed to operate as a multi-module system. A minimum of three modules in series is required.
What type of installations is the BOS-G suited for?
The BOS-G is suited for large residential, commercial, and industrial solar energy storage systems requiring high capacity and efficiency.
How many modules can be connected together?
Standard system configurations support 3, 8, or 12 modules per cluster, depending on required voltage and capacity.
Is the BOS-G compatible with Deye high-voltage inverters?
Yes. The BOS-G is designed to integrate with compatible high-voltage hybrid and commercial inverter platforms.
Who should install the BOS-G battery system?
Installation must be carried out by qualified electrical professionals experienced with high-voltage lithium battery systems.
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