Energy Storage Battery

20kWh BESS LiFePO4 Battery 51.2V 390Ah for Energy Storage Systems and UPS

Product Overview

The MOTOMA M91W MIN is a 51.2V 390Ah LiFePO4 battery with 19.968kWh of energy, built for reliable day-to-day energy storage and backed by up to 8000 cycles and a service life of 15 years or more. Its smart BMS, multi-language color touchscreen, and inverter communication make it easy to monitor and manage, while its flexible design fits solar and wind systems, home energy storage, backup power, UPS, EPS, communication power, and other electrical applications.

Technical Parameters

• Battery Model: M91W MIN
• Nominal Voltage: 51.2V
• Capacity: 390Ah
• Nominal Energy: 19.968kWh
• Operating Voltage Range: 43.2V ~ 58.4V
• Maximum Charging Current: 200A
• Maximum Discharging Current: 200A
• Charging Temperature Range: 0°C ~ 45°C
• Discharging Temperature Range: -20°C ~ 60°C
• IP Level: IP20
• Cell Cycle Life: 8000 cycles @ DOD 80% (0.5C/0.5C, RT 25°C)
• Communication Mode: RS485 / CAN / RS232
• Battery Dimensions (W x D x H): 519 x 302 x 976 mm
• Battery Weight (NW): 156.6 KG
• Fire Protection System: Built-in aerosol fire extinguisher

Charge Performance

• Recommended Charge Current: 50A
• Maximum Charge Current: 200A
• Peak Charge Current: 210A (1s)
• Recommended Charge Voltage: 57.6V
• BMS Charge Cut-Off Voltage: 58.4V (3.65V/Cell)
• Reconnect Voltage: 54.08V (3.38V/Cell)
• Balancing Voltage: 54.4V (3.4V/Cell)
• Balancing Current: 40mA

Discharge Performance

• Recommended Discharge Current: 50A
• Maximum Continuous Discharge Current: 200A
• Peak Discharge Current: 210A (10s)
• BMS Discharge Cut-Off Current: 250A (500ms)
• Recommended Low Voltage Disconnect: 48V (3.0V/Cell)
• BMS Discharge Cut-Off Voltage: 43.2V (2.7V/Cell)
• Reconnect Voltage: 49.6V (3.1V/Cell)
• Short Circuit Protection: 250~500us

Packaging Information

• Packaging Type: 1 Battery / UN Wooden Box
• Package Dimensions (L x W x H): 1108 x 704 x 432 mm
• Gross Weight (GW): 196.6 KG

Certifications & Service

• Certifications: ISO, CE, UN38.3, TÜV Rheinland
• Compatible Inverter Brands: Solis, Victron Energy, Deye, Growatt, Goodwe, Sofar, Sungrow, Solax Power, SMA
• Maximum Parallel Connection: Up to 15 battery units in parallel
• Warranty: 7-year warranty with lifetime technical support

Applications

• Solar and wind power storage systems
• Household energy storage systems
• Emergency lighting and backup power
• Uninterruptible Power Supply (UPS)
• Emergency Power Supply (EPS)
• Communication power and DC power systems
• Electric power systems
• Automatic control systems and ATM equipment
• Electronic apparatus and equipment
• Power supply and alarm/security systems

Downloads

Video

Applications