8W Mini Solar Panel with 5V/6V/9V/12V DC Output
Product Description
The 8W mini solar panel is a compact off-grid power solution with selectable 5V/6V/9V/12V DC output and support for up to 6×18650 batteries. It is designed for small electronics, DIY power setups, sensors, and other low-voltage outdoor applications.
Built around a high-efficiency monocrystalline module and an internal 18650 battery bay, this 8W panel supports multiple output voltages, clear LED status indicators, and simple mounting. It is a practical choice for compact outdoor systems that need flexible voltage options and easy installation.
Details & Specs
| Item | Specification |
|---|---|
| Solar Panel Type | Monocrystalline BC cells |
| Rated Power | 8W |
| MPPT | No |
| Generation Efficiency | Approx. 0.25 (around 25%) |
| Panel Output Voltage | Approx. 6.5V under load; approx. 7.2V open circuit |
| Panel Output Current (max) | Approx. 1200mA |
| Power Adapter Charging | Supported |
| Battery Type | 18650 lithium batteries |
| Maximum Battery Quantity | 6 pcs |
| Battery Connection | Parallel |
| Single-Cell Capacity | Supports up to approx. 3300mAh per cell |
| Total Pack Capacity | Supports up to approx. 19800mAh (6 × 3300mAh), batteries not included |
| Full Charge Time | Approx. 8–12 hours (under strong sunlight, typical conditions) |
| Cell Internal Resistance Matching | For 6 cells, internal resistance error recommended ≤ 0.1–0.2% |
| Minimum Starting Battery Quantity | 1 pc |
| Overcharge Protection Voltage | Approx. 4.28V per cell |
| Overdischarge Protection Voltage | Approx. 3.3V per cell (output stops); approx. 3.0V hardware cutoff |
| Balanced Charging | Supported |
| Charging Voltage Requirement | 4.5V < charging voltage < 5.5V |
| DC Output Voltages | 5V / 6V / 9V / 12V |
| DC Output Currents (rated) | 5V 2A / 6V 1.5A / 9V 1.2A / 12V 1A |
| Connectors | Micro USB input; 5.5 × 2.1 mm DC output |
| Working Humidity | ≤ 90% RH |
| Ingress Protection | IP66 |
| Weight | Approx. 0.85 kg (excluding batteries) |
| Package Size | Approx. 22 × 22 × 6 cm |
Note: 18650 batteries are not included. Use cells with similar capacity and internal resistance as recommended.
How to Use
- Install 1–6 compatible 18650 batteries in the internal battery bay, following the correct polarity and using cells with similar capacity.
- Mount the 8W solar panel with the fixed bracket and angle it toward the sun to improve solar generation.
- Connect your 5V–12V device to the 5.5 × 2.1 mm DC output and select a suitable voltage (5V/6V/9V/12V) on your system if needed.
- Allow the panel to charge the battery pack in strong sunlight; a typical pack reaches full charge in about 8–12 hours.
- When sunlight is limited, charge the battery pack with a suitable 5V adapter through the Micro USB input within the specified voltage range.
Who It’s For
This 8W solar panel is ideal for DIY makers, hobbyists and anyone building small off-grid projects that need a reliable 5–12V power source. It works well for garden sensors, mini IoT prototypes, experimental electronics and other low-power applications where running mains power is inconvenient.
Care & Maintenance
- Keep the solar surface clean and free from dust, leaves or shading to maintain efficiency.
- Use only quality 18650 cells and avoid mixing old and new batteries in the same pack.
- Try to match batteries with similar capacity and internal resistance for balanced charging and discharging.
- Check that seals and covers are properly closed for outdoor installations.
- If you will not use the system for an extended period, disconnect loads and store it in a dry place.
