48V 200Ah
Deep Cycle Lithium Battery


48V 200Ah
Deep Cycle Lithium Battery

A superior solution for powering your off-grid lifestyle, this lithium iron phosphate battery is perfect in many different applications. The RB48V200 maintains consistent power and is equipped with an M10 terminal type and built-in overcharge protection.



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Partial State of Charge Tolerant

Partial state of charge, known as PSOC, which is a killer of lead-acid batteries, does not affect performance or battery life of a lithium battery. Sometimes batteries don’t get fully charged, or they regularly operate in a partial state of charge. Either way, you can count on RELiON lithium batteries living a long and productive life.

Maintenance Free

Plug, play, and charge. No watering, no corrosion.

Eco-Friendly & Safe

RELiON lithium batteries are the ultimate clean energy. No gassing, no fumes, and no pollution. Enjoy reliable power, while protecting the environment, using these non-hazardous batteries.

More Usable Capacity

Lead-acid batteries are typically sized up to two times your energy needs to account for extended periods without sun and less usable energy with higher rates of discharge. Plus, you are typically cautioned to limit your use to 50% of the rated capacity, as using more can significantly reduce performance. Lithium batteries provide 100% of their rated capacity, regardless of the rate of discharge. And, you can use it all and still get substantially longer cycle life.

Highly Efficient

RELiON lithium batteries have super low resistance, allowing you to charge much faster. And lithium batteries are 99% efficient, minimizing the losses during charge. Compare that to traditional lead-acid batteries at 75-80% efficiency, which results in significant loss when recharging.

Long Life

RELiON lithium batteries provide up to 10 times longer life than lead-acid batteries, and they still provide 80% of the rated capacity after 3,500 cycles.

Fast Charging

RELiON lithium batteries charge much faster than traditional lead-acid batteries, and they’re packed with more usable energy and up to 10 times longer life so you’re always ready to go!

Constant Power

Full power available throughout discharge. Voltage does not drop like lead-acid.



Electrical Specifications

Nominal Voltage 51.2 V
Nominal Capacity 200 Ah
Capacity @ 25 A 480 min
Energy 10.24 kWh
Resistance 50 mΩ @ 50% SOC
Efficiency 99%
Self Discharge <3% per Month
Maximum Batteries Connected 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)
Discharge Over-Current Protection 390 A (5 s)
Recommended Low Voltage Disconnect 44.0 V
Discharge Under-Voltage Protection 40.0 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 Continuous Charge Current 200 A
Charge Current 32ºF to 14ºF (0 to -10 ºC) ≤0.1 C (20 A)
Charge Current -4ºF to 14ºF (-20 to -10 ºC) ≤0.05 C (10 A)
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)
Recommended 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 UN38.3, UKCA & CE (battery)
UL1642 (cells) (File# MH64523)
IEC62133 (cells)
Shipping Classification UN 3480, CLASS 9


Discharge Voltage Chart 48 V graph
Discharge Voltage At Various Rates 48 V graph
Charge Voltage Soc Chart 48 V graph
Charge Voltage Charge Chart 48 V graph
Cycle Life Vs Depth Discharge Chart graph
Life Vs Lead Acid Chart graph


The RB48V200 is Great For Powering

Charge V2 230216 114024

Backup Power

Solar 230216 114023

Renewable Energy

How to Read RELiON's Data Sheets

Learn about the different specs and how to read RELiON Data Sheets.

Understanding Battery Terms

Understanding the basics of battery ratings and terminology is important when comparing and selecting the right type and number of batteries for your application to ensure you have enough energy to meet your energy goals.

Learn More About LiFePO4 Battery Terms

We're Invested In Our Lithium Iron Phosphate Batteries

Lithium Certifications Recycling 1000X300