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This 48V 200Ah lithium iron phosphate battery is perfect in many different marine applications. It maintains consistent power and is equipped with an M10 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: 200Ah
  • Length: 34.3 in (872 mm)
  • Width: 14.2 in (361 mm)
  • Height: 15.6 in (395 mm)
  • Weight: 302 lbs (137 kg)
  • Electric Vehicles
  • Marine
  • Solar


Long-Lasting RB48V200 Battery Powers Off-Grid Minnesota Cabin

After snowmobiling, fishing or relaxing on the lake in the scenic Superior National Forest in northern Minnesota, the last thing the Schumann family wanted to do was worry about whether they’d have power when they arrived back at their off-grid cabin. The Schumanns also wanted to enjoy peace and quiet in nature and not have to constantly listen to a noisy, polluting generator that diminishes the experience of being at their cabin in the middle of the forest. After nearly eight months of struggling to maintain power in their cabin by charging their absorbed glass mat (AGM) lead-acid batteries with a generator, the Schumanns had gone through two sets of failed lead-acid batteries and knew they needed to find a better solution.

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Electrical Specifications

Nominal Voltage 51.2 V
Nominal Capacity 200 Ah
Capacity @ 25A 480 min
Energy 10.24 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) 34.3 x 14.2 x 15.6”
867 x 358 x 393 mm
Weight 302 lbs (137 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 - Chemistry Cylindrical - 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 10 A - 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 (3.8 ±0.025 vpc)
(1.0 ±0.3 s)
Reconnect Voltage 60.8 V (3.9 vpc)
Balancing Voltage 60.3 V (3.87 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




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