100W MPPT Solar Charge Controller 9V DC 8-28V 5A Auto Switch

100W 9V MPPT Solar Charging Panel Controller – Efficient Automatic Switch

Maximize the energy harvest from your solar panels with this compact and efficient MPPT (Maximum Power Point Tracking) Solar Charge Controller. Designed for 100W solar setups, this controller features an automatic switching mechanism that continuously optimizes the power transfer from your solar panel to your battery — so you get the most out of every hour of sunlight.

Key Features

• MPPT Technology: Automatically tracks and locks onto the optimal power point for maximum solar energy conversion efficiency.
• Wide Input Range: Compatible with DC input voltages from 8V to 28V, making it versatile for a variety of solar panel configurations.
• 5A Output Current: Delivers a steady and reliable 5A charge current for your battery bank.
• 9V Nominal Output: Optimized for 9V solar charging systems — ideal for small off-grid setups, RVs, boats, and remote power applications.
• Automatic Switching: Intelligent auto-switch function monitors conditions and adjusts operation seamlessly without manual intervention.
• Compact & Durable Build: Constructed from plastic and metal for a lightweight yet sturdy design that can handle everyday use in demanding environments.
• Available in Multi-Pack: Choose from 1, 2, or 3 units to meet the needs of your project.

Specifications

• Rated Power: 100W
• Nominal Voltage: 9V
• Input Voltage Range: DC 8V – 28V
• Output Current: 5A
• Dimensions: 5.7 × 3.7 × 2.3 cm / 2.24 × 1.45 × 0.9 in
• Material: Plastic + Metal
• Package Contents: 1 / 2 / 3 PCS (as selected)

What's in the Box

• 1× (or 2× / 3×) MPPT Solar Charge Controller

Made in Mainland China.

Looking for more smart storage and organizational accessories for your setup? Check out our Adjustable Label Roll Holder – 3D Printed Thermal Printer Stand or keep your cables tidy with our 10-Pack Silicone Cable Ties – Reusable Cord Organizers.

Important Notes

• Product images are for illustration purposes; please refer to the written specifications for exact dimensions.
• Please allow ±5–10 mm variance due to manual measurement.
• Actual color may vary slightly from images due to monitor settings and lighting conditions.

Learn more: OSHA guidance on hand and power tools

Frequently Asked Questions

Q: What solar panel setups is this MPPT solar charge controller compatible with?

A: This MPPT solar charge controller is compatible with solar panels that output between DC 8V and 28V, making it suitable for 100W 9V solar panel systems. It works well for small off-grid setups, RVs, boats, garden lighting systems, and other remote or portable solar power applications.

Q: What is the difference between MPPT and PWM solar charge controllers?

A: MPPT (Maximum Power Point Tracking) controllers are significantly more efficient than traditional PWM (Pulse Width Modulation) controllers. MPPT technology continuously tracks the optimal power point of the solar panel and converts excess voltage into additional charge current, typically achieving 20–30% more efficiency — especially in cold or cloudy conditions.

Q: Can I buy multiple units of this solar charge controller?

A: Yes! This product is available in packs of 1, 2, or 3 units so you can easily expand your solar power system or keep spare controllers on hand for larger installations or backup use.

Q: What are the dimensions of this solar charge controller?

A: The controller measures approximately 5.7 × 3.7 × 2.3 cm (2.24 × 1.45 × 0.9 inches), making it very compact and easy to integrate into any solar power system enclosure or panel setup.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.