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4W Mini Solar Panel for DIY & Outdoor Cameras

LinkSolar  |  SKU: LS-SP4W-MV5
$4290 USD
Taxes, discounts and shipping calculated at checkout.

Features
  • 4W monocrystalline panel – high-efficiency solar cell (up to 23% conversion) in a compact format.
  • Multi-voltage DC output – selectable 5V/6V/9V/12V output to match a wide range of small devices.
  • 18650 battery support – internal battery bay for up to 6 x 18650 cells (parallel), supporting up to approx. 3300mAh per cell / 19800mAh total (batteries not included).
  • Built-in protection electronics – over-charge, over-discharge, balance charging, short-circuit and reverse-connection protection for safer operation.
  • LED status indicators – dedicated LEDs for PV power, external charging and battery level, plus low-voltage indication.
  • Rugged, weather-resistant design – IP66 protection rating and waterproof push-button switch for outdoor use.
  • Ready to mount – comes with a fixed bracket for easy installation and positioning toward the sun.
  • Flexible charging options – supports charging via sunlight or a 5V power adapter through the Micro USB input.

Product Description

The 4W mini solar panel is a compact off-grid power solution with built-in controller and multi-voltage DC output. Whether you’re building a DIY solar project, powering small electronics away from the grid, or adding backup power to a low-power system, this 4W mini solar panel gives you flexible 5V/6V/9V/12V output in one tidy package.

With a high-efficiency monocrystalline 4W solar module, support for up to six 18650 lithium batteries (not included), and clear LED status indicators, it’s designed to make small solar setups simple, reliable, and easy to monitor.

rear view of solar panel showing LED indicators and mounting bracket

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. 

solar panel LED indicators showing battery, charging and output status

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.

IP66 waterproof solar panel powering hunting or trail camera

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

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