20kWhr, Freestanding Lithium Battery, 52v, 400Ahr


Model: 21-48 Indoor

Color: Black

Manufacturer Warranty:  5 yr  pro-rated performance warranty(see warranty statement for more details


Floor standing LiFePo Solar Energy Storage System for use with inverters requiring 48V battery.  This enclosed instrument rack is a full-size battery for use for battery backup or off-grid systems.  Up to 4 batteries can be wired in parallel for increased capacity.

Must be placed in-doors, in controlled temperature locations.


48V  lithium iron phosphate batteries can provide reliable backup power for access network equipment, remote switch, mobile communication, transmission equipment and other systems with their integrated structure design, intelligent centralized monitoring and standardized cabinet installation. The product can realize multi-group parallel connection and provide flexible and effective power system solutions for telecommunication operators.

Product Features

◆ The cells with lithium iron phosphate technology has high safety and long service life.
◆ The built-in intelligent BMS battery pack management system can effectively prevent battery overcharge, overdischarge, overcurrent and overtemperature.
◆ The built-in intelligent battery equalization control system can effectively improve the consistency of battery packs, prolonging the service life of battery packs.
◆ Standard 19-inch box design, easy to install and upgrade
◆ RS485/RS232 communication output for monitoring◆ Maintenance free

5 Year Factory Warranty

UL Listed Battery Cells
3500 Charge Cycle Life
Up to 4 full towers can be paralleled to increase capacity
Requires one unit to run a 10 kW Inverter.
Requires minimum of three units to run a 12 or 15 kW Inverter.

This 20KWh 51.2V 400Ah LiFePO4 lithium battery solar energy storage system has the advantages of large capacity, high power, small self-discharge, and good temperature resistance. Because of its reasonable structure, it is easy to assemble and disassemble.

It is a kind of environmentally friendly backup power system. We use phosphates rather than cobalt to avoid environmental concerns by lowering the possibility of thermal runaway because of improper disposal and save the production cost as well. Compared with other products in the market now, this kind of product experiences a lower rate of capacity loss. With state-of-the-art power conversion and energy storage technologies, our Energy Storage System (ESS) offers high-efficiency power conditioning capabilities for demand management, power dispatch, renewable energy smoothing, etc. Our ESS can provide comprehensive energy storage for residential, commercial and utility applications. Our Li-ion battery portfolio covers cells, 48V modules, cabinets (indoor/outdoor) and containers, which offer customers excellent scalability and adaptability to a wide variety of requirements.


  • Manufactured based on superior materials with good corrosion resistance, heat resistance, explosion-proof and sealing performance.
  • Up to four built-in battery packs, energy storage system has large capacity, high power, and excellent charge and discharge performance.
  • Strictly controls the raw materials selection and the whole production process to ensure that the ESS has stable performance and excellent quality.
  • Tested by relevant national departments in the aspects of quality and performance indicators.
  • Ensured to be a high-quality battery with excellent performance.
  • High integration with less installation space.
  • Long life cycle, >3500 times at 80% DOD.
  • Free of heavy metals and environment friendly.
  • Maintenance free, no memory effect.
  • Internal BMS with full protection, high voltage protection with higher reliability.

Specifications (tower with 4 battery units)

  • Battery System Power: 20kWh
  • Battery System Capacity: 400Ah
  • Battery Voltage: 51.2VDC
  • Battery Charge Voltage: 58.4VDC
  • Battery Discharge Lower-Voltage: 46VDC
  • Battery System Charge Current (Standard): 100A
  • Battery System Max Charge Current: 200A
  • Battery System Discharge Current (Standard): 200A
  • Battery System Discharge Current (Peak): 400A
  • Operation Cycle Life: Over 4000 times
  • Protection Class: IP54
  • Cell Technology Lifepo4 Efficiency: 98%
  • Depth of Discharge: 100%
  • Communication  RS485
  • Battery Pack Cell Quantity in Series (pcs): 16S (Hybrid)
  • Operation Life: 10+ years
  • Dimension: 25.6L * 18.9W * 7.5H in. (650 * 480 * 190mm)
  • Weight: 216 Lbs. (98Kg)
  • Operation Temperature: 32~122F (0~50C)
  • Storage Temperature: -4~140F (-20~60C)


  • Energy Storage
  • Solar-Wind Power System / City Grid (On/Off) / Community and Family
  • Back-up System and UPS
  • Telcom Base / CATV system / Computer Server Center / Non-life support applications
  • Security and Electronics / Mobile POS, Mining Light / Torch / LED Light / Emergency Light

Additional information

Weight 520 lbs
Dimensions 84 × 30 × 28 in