Original
By certification 
Feature:
1. High charging & storage efficiency
2. Lighter weight, with the best power-to-weight ratio
3. Longer life, more than 2000 cycles
4. No memory effects
5. Low self-discharge rate, less than 3% monthly
6. Environment friendly, Non-toxic, non-contaminating and no rare metal
Specification:
No. |
Item |
General Parameter |
Remark |
1 |
Rated Capacity |
21Ah |
Standard discharge(0.2 C5)after standard charge(0.2 C5) |
2 |
Minimal Rated |
19.6Ah |
|
3 |
Nominal Voltage |
12.8V |
|
4 |
Cycle Life |
Higher than 60% of the Initial Capacity of the Cells |
◆Charge: CC@0.2C to 14.6V, then CV till current to 0.05C |
5 |
Discharge cut-off voltage |
10.0V |
10.0V( recommended) |
6 |
Charging cut-off voltage |
14.8V |
14.6V (recommended) |
7 |
Cell and assembly method |
|
|
IFR18650EC 1.5AH |
4S14P |
||
8 |
Housing material |
ABS+PC housing |
|
9 |
Standard charge |
0.2C constant current(CC) charge to 14.6V,then constant voltage (CC)14.6V charge till charge current decline to ≤0.05C |
Charge time : Approx 7h |
10 |
Standard discharge |
Constant current 0.2C |
|
11 |
Maximum Charge Current |
1C |
(0.2C Recommended) |
12 |
Continuous Discharge Current |
1C |
|
Peack Discharge Current |
5C |
|
|
13 |
Operation Temperature Range |
Charge: 0~45℃ |
60±25%R.H. |
Discharge:-10~60℃ | |||
14 |
Storage Temperature Range |
Less than 1 year : 0~25℃ |
60±25%R.H. |
Less than 3 months:-5~35℃ | |||
15 |
Weight |
Approx:2.9Kg |
|
16 |
Max.Dimension |
Height:132mm |
132mm*77mm*140mm |
Width:77mm | |||
Length:140mm |
SUNLAND is one of the leading manufacturers and suppliers of non-toxic waterproof 12v lithium battery pack 21ah for off-grid solar system in China. Under strict quality control system, our quality energy storage products made in our own professional factory must be your best choice.
