11.1V 20Ah 3S7P 18650 Li ion Battery Pack
Solar lighting manufacturers require battery packs that offer extended runtime, reliable deep-cycle performance, and clear status monitoring for maintenance planning. This 11.1V 20Ah battery pack delivers consistent energy storage and output for off-grid solar applications, combining robust capacity with user-friendly status indication to optimize system usability and service life.
Key features：
- LED Power Indicator :Clear 4-level charge display enables quick status monitoring and maintenance planning
- Integrated Safety BMS :Comprehensive protection against over-charge, over-discharge, and short circuit
- High-Capacity 20Ah Design :Extended runtime for prolonged illumination requirements
- 3S7P Quality Cell Configuration :21 high-grade 2900mAh cells ensure stable performance
| No. | Item | Specification | Note |
|---|---|---|---|
| 1 | Nominal Voltage | 11.1V | 3.7V/Cell |
| 2 | Nominal Capacity | 20.3Ah | @0.2C |
| 3 | Minimum Capacity | 19.25Ah | |
| 4 | Shipment Voltage | / | |
| 5 | Initial Internal Impedance | ≤250mΩ | AC 1KHZ |
| 6 | Standard Charge Voltage | 12.6V | 4.2V/Cell |
| 7 | Standard Charge Current | 10A | |
| 8 | Max. Charge Current | 20A | |
| 9 | Standard Discharge Current | 20A | |
| 10 | Max. Discharge Current | 40A | |
| 11 | Burst Discharge Current | 50A | ≤5ms |
| 12 | Discharge Cut-off Voltage | 7.5V | 2.5V/Cell |
| 13 | Cycle Life | ≥500cycles | Capacity retention ≥80% |
| 14 | Charge Temperature | 0°C~+45°C | Standard charge |
| 15 | Discharge Temperature | -20°C ~+60°C | Standard discharge |
| 16 | Storage Temperature | -20°C~45°C | ≤3 months |
| -20°C~25°C | ≤1 year | ||
| 17 | Weight | About945 | g |
| 18 | Special Request |
11.1V 20Ah 18650 Battery Pack FAQs
Is the battery compatible with common solar charge controllers?
Yes. The battery works with both PWM and MPPT controllers. We recommend setting the charging parameters to 12.6V absorption and 12.0V float for optimal performance.
How does the battery perform in winter or low-temperature conditions?
The pack operates from -20°C to 50°C. For areas below -10°C, we recommend our low-temperature version with specialized electrolyte, maintaining over 75% capacity at -20°C.
Can the LED indicator be customized for different voltage thresholds?
Yes. We can program the LED indicator to match your specific voltage requirements, or provide a version without LED for systems with external monitoring.
Can the battery be used in parallel for higher capacity systems?
Yes. Parallel connection is supported with proper system design. We recommend using separate charge controllers or our balanced parallel connection kit.
Tailored Customization
Our design team can create custom battery designs for just about any device or machine.
Timely Delivery
Our efficient production and distribution process gets your product delivered in a timely manner.
Quality Guarantee
We stand by our products and guarantee you’ll be happy with your purchase.
