Build an MPPT Solar Charge Controller with ESP32 & INA219 – Maximize Solar Energy Harvesting

Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.

Imagine harvesting the maximum possible energy from every ray of sunlight. With this kit, you’ll assemble a perturb and observe MPPT charge controller on an ESP32 microcontroller. The system reads real-time current and voltage from two INA219 sensors, runs the tracking algorithm, and drives an IRF540N MOSFET to charge two 18650 cells efficiently. A crisp OLED display shows live power metrics, making the invisible world of solar optimization tangible and exciting.

What You'll Build

You will create a complete solar charge controller that intelligently adjusts the operating point of a 6V panel to deliver peak power into a 18650 battery pack. The finished project charges two cells safely, displays voltage, current, and power on the OLED, and proves that MPPT outperforms a direct connection. It’s a working prototype you can use in mini-projects, science fairs, or as a foundation for off-grid IoT nodes.

What You'll Learn

• Implement the perturb and observe MPPT algorithm on ESP32
• Measure current and voltage with INA219 sensors over I2C
• Drive a MOSFET for PWM battery charging control
• Display real-time power data on a 0.96-inch OLED

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

This kit is ideal for CBSE Class 11-12 students exploring renewable energy concepts, B.Tech ECE/EEE undergraduates prototyping semester projects, and ATL Tinkering Lab innovators preparing for Smart India Hackathon. If you’re curious about how solar charge controllers work and want a hands-on way to learn MPPT, this project gives you exactly that experience in a single afternoon.

Built and Backed by Compoden

Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.