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The RB20-X is the smallest battery in the RELiON X-Series (High Continuous and Peak Performances). Safe and lightweight the 12V 20Ah lithium iron phosphate battery is equipped with a flag terminal type and a built-in battery management system (BMS). The RB20-X battery meets UL, UN and CE certifications.

All RELiON LiFePO4 batteries have installation flexibility, fast-charging capabilities and are maintenance free.

PRODUCT SPECIFICATIONS
  • Voltage: 12.8V
  • Amp Hours: 20Ah
DIMENSIONS & WEIGHT
  • Length: 7.1 in (181 mm)
  • Width: 3 in (76 mm)
  • Height: 6.6 in (166.5 mm)
  • Weight: 6.1 lbs (2.75 kg)
APPLICATIONS
  • Solar

DATA SHEET

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Electrical Specifications

Nominal Voltage 12.8 V
Nominal Capacity 20 Ah
Capacity @ 25A 48 min
Energy 256 Wh
Resistance ≤60 mΩ @ 50% SOC
Efficiency 99%
Self Discharge <3% per Month
Maximum Modules in Series 3

Mechanical Specifications

Dimensions (L x W x H) 7.1 x 3.0 x 6.6” 181 x 76 x 166.5 mm
Weight 6.1 lbs (2.75 kg)
Terminal Type Flag Terminal
Terminal Torque 35 - 44 in-lbs (5 - 5 N-m)
Case Material ABS
Enclosure Protection IP56
Cell Type - Chemistry Cylindrical - LiFePO4

Discharge Specifications

Maximum Continuous Discharge Current 50 A
Peak Discharge Current 90 A (4 s ±1 s)
BMS Discharge Current Cut-Off 140 A ±20 A (12 ±5 ms)
Recommended Low Voltage Disconnect 11 V
BMS Discharge Voltage Cut-Off 8 V (2.0 ±0.08 vpc) (20 ±5 ms)
Reconnect Voltage 9 V ±1.32 V (2.25 ±0.33 vpc)
Short Circuit Protection 200-600 µs

Charge Specifications

Recommended Charge Current 10 A
Maximum Charge Current 50 A
Recommended Charge Voltage 14.2 V - 14.6 V
BMS Charge Voltage Cut-Off 15.6 V (3.9 ±0.025 vpc)
(1.0 ±0.5 s)
Reconnect Voltage 15.2 V (3.8 ±0.050 vpc)
Balancing Voltage 14.4 V (3.6 ±0.025 vpc)

Temperature Specifications

Discharge Temperature -4 to 140 ºF (-20 to 60 ºC)
Charge Temperature 32 to 113 ºF (0 to 45 ºC)
Storage Temperature 23 to 95 ºF (-5 to 35 ºC)
BMS High Temperature Cut-Off 167 ºF (75 ºC)
Reconnect Temperature 122 ºF (50 ºC)

Compliance Specifications

Certifications CE (battery)
UN38.3 (battery)
UL1642 & IEC62133 (cells)
Shipping Classification UN 3480, CLASS 9

PERFORMANCE CHARACTERISTICS

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