CN3791 6V MPPT Solar Charger Module

Name: CN3791 6V MPPT Solar Charger Module
Brand: ShillehTek
SKU: ST-VQNFNAOTJ4BJ
Price: 5.99 USD
Availability: InStock

SKU ST-VQNFNAOTJ4BJ

$5.99 USD Shipping & tax calculated at checkout

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CN3791 6V MPPT solar charger module for efficient battery charging and power management from small solar panels, ideal for IoT, remote sensors, garden lights, Arduino, ESP32 and solar prototyping.

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Overview

Product Overview

CN3791 6V MPPT solar charger module is a solar battery charging and power-management board that uses the CN3791 controller to draw energy efficiently from a 6V solar panel. By applying maximum power point tracking (MPPT), it helps improve charging performance under changing sunlight, making it useful for outdoor electronics, remote sensors, low-power IoT devices, garden lighting, and portable DIY power projects. This module is a practical choice for solar prototyping and energy-harvesting systems where stable charging from a small panel matters, and it fits well into Arduino, ESP32, and Raspberry Pi accessory builds that need dependable solar input.

Questions & answers

Frequently asked questions

Does this solar charger work with Arduino or ESP32?

Yes. It can be used in Arduino, ESP32, and Raspberry Pi accessory builds as part of the solar charging power system. It is not a data module, so the development board still needs an appropriate regulated power input.

Does this CN3791 module require soldering first?

The ShillehTek version is pre-soldered, so it is ready to wire into a project without adding headers first. You still need to connect a compatible solar panel, battery, and any required power regulation for your load.

What solar panel does this charger module use?

This board is designed to draw input from a 6V solar panel and uses the CN3791 controller for MPPT charging. Always match the panel and battery connections to the board labeling and product documentation before powering it.

Can it charge remote IoT sensor projects?

Yes. It is intended for remote sensors, low-power IoT devices, garden lighting, outdoor electronics, and portable DIY solar projects. MPPT helps improve charging performance when sunlight changes, but the project must still fit the available solar energy.

Why is my solar charger not charging reliably?

Check sunlight exposure, panel orientation, wiring polarity, and whether the solar panel is a 6V type intended for this module. Shade, weak indoor light, loose wiring, or an oversized load can make charging appear unstable.

Have other questions?

Chat with our US-based team — we usually reply fast.

What's included