I bought an Epever Tracer 5415AN from Y-SOLAlR Store on Aliexpress, delivery from Germany on April 4th this year. I bought the MT50 remote control, too.
Configuration:
3 panels of 410 watt in series, VOC 105v, Imp 13A
Battery Li Ion 14s 6 kwh SDI, 48v min, 57v max
The system works...