4W Mini Solar Panel with 5V/6V/9V/12V DC Output
Product Description
The 4W mini solar panel is a compact off-grid power solution with selectable 5V/6V/9V/12V DC output, built-in protection electronics, and support for up to 6×18650 batteries. It is suitable for outdoor cameras, small sensors, DIY electronics, and other low-power applications.
With a high-efficiency monocrystalline 4W module, clear LED status indicators, and a fixed mounting bracket, this panel is designed for simple low-power solar setups that need compact size, flexible output, and straightforward installation.
Details & Specs
| Item | Specification |
|---|---|
| Solar Cell Type | Monocrystalline silicon |
| Solar Power | 4W |
| Conversion Efficiency | Approx. 23% |
| Panel Output (direct) | ~6.5V under load, ~7.2V open circuit |
| Panel Output Current (max) | Approx. 600mA |
| System Output Voltages | 5V / 6V / 9V / 12V |
| System Output Currents (rated) | 5V 2A / 6V 1.5A / 9V 1.2A / 12V 1A |
| Input / Output Connectors | Micro USB input, 5.5 × 2.1 mm DC output (5521) |
| Battery Type | 18650 lithium cells (supports KC-compliant cells) |
| Battery Slots | Up to 6 pcs, parallel connection |
| Supported Pack Capacity | Up to approx. 19800mAh (6 × 3300mAh), batteries not included |
| Charge Voltage Requirement | 4.5V < charge voltage < 5.5V |
| Over-charge Protection | Approx. 4.28V per cell |
| Over-discharge Protection | Output stops at approx. 3.3V per cell; hardware cutoff at approx. 3.0V per cell |
| Balance Charging | Supported |
| Indicators | Red PV generation LED, green external charging LED, 1 × battery level LED, low voltage indicated when red LED turns off |
| Environmental | Operating humidity ≤ 90% RH |
| Ingress Protection | IP66 |
| Weight | Approx. 0.5 kg (excluding batteries) |
| Package Size | Approx. 20 × 16 × 6 cm |
Note: 18650 batteries are not included.
How to Use
- Install up to six 18650 cells (if needed) in the internal battery bay, observing correct polarity and using cells with similar capacity and condition.
- Mount the 4W mini solar panel using the included bracket, tilting it toward the sun for best exposure.
- Connect your device to the 5.5 × 2.1 mm DC output port and select the appropriate 5V/6V/9V/12V output on your system if applicable.
- Let the panel charge the battery pack under sunlight; typical full charge time is around 8–12 hours of strong sun with the recommended battery pack.
- You can also top up the battery pack via a suitable 5V USB power adapter (4.5–5.5V) through the Micro USB input when sunlight is not available.
Who It’s For
This 4W mini solar panel is ideal for DIY makers, hobbyists, and anyone needing a small off-grid power source for low-power 5V–12V electronics. Use it for garden projects, small sensors, experimental IoT devices, or as a compact backup supply where running mains power isn’t practical.
Care & Maintenance
- Keep the solar surface clean and free from dust or shading to maintain efficiency.
- Use only recommended 18650 cells and avoid mixing old and new batteries in the same pack.
- Ensure all seals are properly closed to maintain the IP66 rating in outdoor installations.
- Disconnect loads and store in a dry place if the panel will not be used for an extended period.
Package Contents
Solar Panel x 1
Mounting Bracket x 1
Screw x 1
Instruction Manual x 1
Screw Accessory Pack x 1
