PRICE: $13,297.95

Earth Week Celebration Sale: Save 10% on Our Eco-Friendly Batteries! Use Promo Code EARTH10 at Checkout

Earth Week Celebration Sale: Save 10% on Our Eco-Friendly Batteries! Use Promo Code EARTH10 at Checkout

Contact Us

FREE GROUND SHIPPING (Estimated shipping date 1-2 weeks)

* Within the continental U.S. only

This 48V 300Ah lithium iron phosphate battery is perfect in many different applications, including marine and EV. It maintains consistent power and is equipped with an LINYI Connector terminal type and built-in overcharge protection. All RELiON LiFePO4 batteries have installation flexibility, fast-charging capabilities and are maintenance free.

  • Voltage: 51.2V
  • Amp Hours: 300Ah
  • Length: 29.1 in (740 mm)
  • Width: 19.6 in (497 mm)
  • Height: 15.7 in (398 mm)
  • Weight: 388 lbs (176 kg)
  • Electric Vehicles
  • Marine
  • Solar


Gary Leatherman

Awesome battery for my emergency power back up on my 18kw solar system. Their support team is incredible and I am very pleased with my purchase.

How to Read RELiON's Data Sheets

We know that Data Sheets can sometimes be confusing, overwhelming, or difficult to decipher. In this Tech Video, one of our experts breaks down how to easily read our Data Sheets.

Watch Video



Electrical Specifications

Nominal Voltage 51.2 V
Nominal Capacity 300 Ah
Capacity @ 25A 720 min
Energy 15.36 kWh
Resistance 50 mΩ @ 50% SOC
Efficiency 99%
Self Discharge <3% per Month
Maximum Modules in Series 1 (Single Use)

Mechanical Specifications

Dimensions (L x W x H) 29.1 x 19.6 x 15.7”
740 x 497 x 398 mm
Weight 388 lbs (176 kg)
Terminal Type M10 x 1.5
Terminal Torque 110 - 125 in-lbs (12.2 - 14 N-m)
Case Material Steel Case
Enclosure Protection IP65
Cell Type Cylindrical
Battery Chemistry LiFePO4

Discharge Specifications

Maximum Continuous Discharge Current 200 A
Peak Discharge Current 250 A (4 s ±1 s)
BMS Discharge Current Cut-Off 390 A (5 s)
Recommended Low Voltage Disconnect 44 V
BMS Discharge Voltage Cut-Off 40 V (2.5 ±0.1 vpc)
Reconnect Voltage 40.5 V (2.53 ±0.1 vpc)
Short Circuit Protection 5%

Charge Specifications

Recommended Charge Current ≤100 A
Maximum Charge Current 200 A
Charge Current 32ºF to 14ºF (0 to -10 ºC) ≤0.1 C
Charge Current -4ºF to 14ºF (-20 to -10 ºC) ≤0.05 C
Recommended Charge Voltage 56.0 V - 58.4 V
BMS Charge Voltage Cut-Off 60.8 V (3.9 vpc)
Reconnect Voltage 60.3 V (3.87 vpc)
Balancing Voltage 57.6 V (3.6 ±0.025 vpc)

Temperature Specifications

Discharge Temperature -4 to 131 ºF (-20 to 55 ºC)
Charge Temperature* -4 to 131 ºF (-20 to 55 ºC)
Storage Temperature 23 to 95 ºF (-5 to 35 ºC)
BMS High Temperature Cut-Off 149 ºF (65 ºC)
Reconnect Temperature 145 ºF (63 ºC)
*Refer to charge currents below 0°C (32°F)

Compliance Specifications

Certifications CE (battery)
UL1642 & IEC62133 (cells)
Shipping Classification UN 3480, CLASS 9




Our team of dedicated LiFePO4 specialists can help!

Contact Us

We're Invested In Our Lithium Iron Phosphate Batteries

Certifications Footer