This project is a compact Solar Power Monitor designed to track key parameters in a small solar installation. It measures the MPPT charger, battery, inverter, and auxiliary loads using multiple current and voltage sensors, all controlled by an STM32 microcontroller.
Hardware Overview
The custom PCB integrates:
- four INA219 current‑measurement channels (MPPT, battery, inverter, auxiliary)
- inverter and auxiliary start control
- UART serial communication
- 5V and 3.3V regulated power rails with ST regulators
- clearly separated power, signal, and control sections
The board serves as a complete hardware platform for real‑time monitoring and control in off‑grid or hybrid solar systems.goes here
Firmware
The firmware handles I2C communication, filtering, control logic, and serial communication. Additional features will be added in future updates.
Project Details
Full schematics, PCB files, firmware, and explanations are available here:
🔗 Hackster Project Page:
https://www.hackster.io/popa-mihai/solar-power-monitor-a97bc1#overview
Acknowledgment
The custom PCB was manufactured by PCBWay, who sponsored the boards for this project.
