Protection for overvoltage, islanding, overload, overheating, etc. AS4777certificate,VDE0126,DK5940 MCS certificate. Product Description:The latest topology, high-efficiency moduleOptimal MPPT technologyMultiple communication via RS232,RS485/USB (Optional)Multilingual LCD, easy to operateParallel running mode with a string of invertersProtection for overvoltage, islanding, overload, overheating, ...