ESP32 Photovoltaic MPPT step-down synchronous rectification [ADS1115]

Foreign open source handling https://www.instructables.com/DIY-1kW-MPPT-Solar-Charge-Controller/

This project is modified from Gggggg's Lichuang version esp32 mppt - Jialichuang EDA open source hardware platform https://oshwhub.com/gggggg/esp32-1kw-mppt_copy

V4.1 This version has wrong buttons. You need to cut off one of the fixed feet of each of the 4 buttons.

V4.2 Fixed button problem 20220722

Modification content:

Old habit, remove some USB-ttl circuits and change to direct ttl interface

Remove a dcdc 3.3v circuit and use LDO to convert 5v to 3.3v

LCD power supply changed to 5V

Discuss with each other QQ:483012638

MPPT perturbation algorithm with CC- CV

80V , 30A input (solar, wind turbine, PSU )

50V , 35A output (lithium-ion, LifePO4 , lead-acid, etc.)

98% peak conversion efficiency (synchronous buck)

WiFi and Bluetooth Blynk Phone App Telemetry

Charger /PSU mode (can operate as programmable buck converter)

16 -bit /12- bit precision ADC measurement (ADS1115/ADS1015)

Automatic ACS712-30A current sensor calibration

Battery and Input Disconnect Recovery Protection Protocol

LCD menu interface (with settings and 4 display layouts)

Flash memory (non-volatile setting saving function)

Setable PWM resolution ( 16bit-8bit )

Programmable PWM switching frequency (1.2kHz - 312kHz)

Power capability:

12V output / battery - 420W @35A

24V output / battery - 840W @35A

36V output / battery - 1000W @35A ( 1260W when safe unlocked )

48V output / battery - 1000W @35A ( 1680W when safe unlocked )

A friend has already done version 4.1 and helped find some problems and corrected them in 4.2pcb.