24V3500W, 48V6500W, 60V9000W, 72V12000W 220V pure sine wave inverter semi-finished motherboard (24 tubes)

semi-finished kit does not include field tubes and large electrolysis. (No technical support!) 24V3500W, 48V6500W, 60V9000W, 72V12000W Board size: width 150mmx length 315mm Semi-finished pure sine wave inverter main board 24 tubes Power frequency inverter main board Semi-finished semi-finished product: Semi-finished product welded in the main picture + radiator + 32 screws + heat sink fixing screw washer + 12 pipe isolation pads. capacitor can be 3300uf / 100V, the diameter is 25mm, and the crystal field tube can be HY5012,ⅠRFP4568 171A 150V，Do 36V input, you can use HY4008 etc.