Solar Monitor 2 - all models
Firmware 1.0.03 - To be used only for SM2-MU units with firmware revision <= 1.0.03.Release NotesFirmware 2.1.2 build 41 - To be used only for SM2-MU units with firmware revision 1.0.04 and higher.(not recommended, only for test cases)Firmware 2.2.0 build 55 - Modbus Sunspec M2M functionality (first version,.not recommended, only for test cases)Firmware 2.2.3 build 71 - For more details and beta versions see https://www.solarmonitor.cz/download/public/firmware/Firmware 2.2.3 build 72 - This firmware tries not to use SD card for sending data to portal. It only stores data if there is no Internet connection available. This increases reliability in case there is an interference with inverter electromagnetic noise.