MPPT charge controller for DIN rail mounting

First prototype tested, but issues should still be expected.

Schematic: PDF file

Concept description

This charge controller is mainly developed to test the following features:

Very compact and modular housing design for DIN rail mounting
Thermal performance and maximum heat dissipation via internal heat sinks
Performance of the internal OpAmp of the STM32G431 MCU for current measurement
Dump-load control for small wind turbines using the existing PV reverse blocking MOSFET

Solar/Wind input terminal
- Max. 80V (100V MOSFETs used)
- DC/DC converter inductor current max. 20A
Battery output terminal
- 10 V - 32 V (supporting 12 V and 24 V battery systems)
- Max. current: 20A (limited by inductor current)
New STM32G431 ARM MCU with advanced digital power conversion features
Expandable via Olimex Universal Extension Connector (UEXT)
Only single LED as power indicator. Additional user interface can be included in separate PCB in front panel housing and connected via UEXT
CAN interface via RJ45 connectors
Optional external temperature sensor (10k NTC)
DIN rail mounting using Phoenix Contact BC series housing