I. Product Overview
MPPT Solar Power Management Module, USB-C Bidirectional Fast Charging, 5V/5A Regulated Output, 2S 21700 Lithium Battery Charging
The Solar Energy Manager E is a solar power management module with fast charging capabilities. It supports charging two series-connected 3.7V 21700 lithium batteries via a solar panel or USB interface, and provides a regulated 5V/5A output (the Type-C port also supports multiple protocols including PD/QC/FCP/PE/SFCP). The module features MPPT (Maximum Power Point Tracking) and battery charge/discharge protection. MPPT automatically adjusts the charging power based on the input voltage for more efficient utilization of solar energy. The charge/discharge protection circuit monitors battery voltage in real time, preventing overcharge and over-discharge, thereby protecting the batteries and extending their lifespan. With its excellent stability and efficient charge/discharge management, it is ideal for solar power generation, low-power IoT, environmental monitoring, power banks, and other green energy projects.
II. Features
- CN3882 solar MPPT synchronous buck charger with three selectable solar operating points
- IP2369 45W-class USB-C bidirectional buck-boost fast charging subsystem
- Dual-cell independent protection with ETA3000 inductive active balancing
- Supports multiple charging sources: solar panel, power adapter, and USB-C PD adapter
- Onboard USB-A, USB-C, 3.81mm terminal blocks, and 2.54mm pin headers for voltage output; USB-C port supports bidirectional fast charging input/output
- Onboard multiple status LEDs for easy monitoring of battery charge/discharge status
- Supports simultaneous charging and discharging
- Onboard overcharge/over-discharge/reverse polarity/overcurrent/active balancing protection circuits for stable and safe operation
III. Specifications
| Charging Sources | Power adapter, solar panel, USB-C PD power adapter |
| Supported Battery Type | 3.7V 21700 battery |
| Battery Operating Voltage | 6.0V ~ 8.4V (2 cells in series) |
| Solar Charging Input Voltage | 11V ~ 28V |
| USB-C Input/Output Voltage Levels | 5V/9V/12V/15V/20V (9V, 12V, 15V, 20V levels require PD fast charging protocol negotiation) |
| Charging Power | Solar: up to ~41WUSB-C: up to 45W |
| Discharge Power | 5A (USB A / 2P 3.81mm terminal block: 5V); 2A (3.3V)USB-C: up to 45W |
| Quiescent Current | ~10µA (battery switch OFF)~10mA (battery switch ON) |
| Over-Discharge Protection Voltage | 6.0V ± 1% |
| Battery Charging Efficiency | Solar: ~92%USB: up to 94% |
| 5V Output Efficiency | ~93% |
| 3.3V Output Efficiency | ~93% |
| Dimensions | 86.5mm x 66mm |
IⅤ. Resource Overview
IⅤ. Resource Overview
（1）DC-044 Jack: Solar panel input
（2）3.81mm Terminal Block: Solar panel input
（3）USB-C Connector: Fast charging input/output interface
（4）3.81mm Terminal Block: 5V power output
（5）USB-A Connector: 5V power output
（6）Battery Switch: Set to "ON" for normal module operation
（7）2.54mm Output Pin Header: 5V and 3.3V output pins
（8）Battery 1 Reverse Polarity Indicator LED (Red)
（9）Battery Voltage Balancing Indicator: Illuminates when cells are being balanced
（10）Battery 2 Reverse Polarity Indicator LED (Red)
（11）Battery Voltage Indicator LEDs
（12）Power Output Indicator LED: 5V and 3.3V output indication
（13）USB-C Fast Charging Activation Button
（14）Other Indicator LEDs: CHRG (solar charging indicator); DONE (solar full charge indicator); Solar Alarm (solar input reverse polarity indicator); USB-C STATE (USB-C charge/discharge status indicator)
（15）Status Monitoring Pins (unpopulated 2.54mm 1×6P pads)
（16）2P 21700 Battery Holder
（17）MPPT Voltage Setting Jumper Pins
WIKI
https://seengreat.com/wiki/215Package Contents
- Solar Energy Manager E x1
