Update 2024/05/11: two i2c daugther boards with bluetooth 5.0 and pwm mosfets to double LiIon cycles: https://onlinelibrary.wiley.com/doi/10.1002/aenm.202400190

$2 pcb order at JLPCB ("Add gerber file" upload button): https://github.com/RoboDurden/Esp32_20A_80V_dcdc/blob/main/KiCad%20PCB%20v2/production/Esp20A80V_2024-05-12_13-24-33/Esp20A80V.zip

two 2.4 mOhm n-Channel Mosfets for 60V (or above with different mosfet), OLED or eInk display

two 6 mOhm PROFET with current sensing, OLED or eInk display

All GPIO pins to alternative headers. All headers on 2.54mm grid for prototyping board.

https://youtu.be/tdmJfj5aSUM = major update: ESP32 20A 80V dcdc/mppt with TouchTft

Update 2024/04/22: v2 added - untested pcb !

PCB and S2_Mini are cheap, so simply solder S2_Mini to backside. The tin solder should quickly be sucked into the holes of the S2_Mini and connect to the holes of the pcb :-)

Esp32_20A_80V_dcdc v1

20A 80V dcdc/mppt with Esp32 and touch display

KiCad pcb

$4 pcb order at JLPCB ("Add gerber file" upload button): https://github.com/RoboDurden/Esp32_20A_80V_dcdc/blob/main/KiCad%20PCB%20v1/production/Esp20A80V_2024-04-22_16-06-04/Esp20A80V.zip

replaces lcd pickup module

https://www.aliexpress.com/item/1005004966830126.html

KiCad circuit

blender 3d models

blender box / housing

Arduino code (ssd1306 or ST7735+Touch)