ITECH power supply and electronic load have rich programming functions, which can simulate the steady-state working condition, acceleration working condition and driving condition curve of various road conditions. A variety of models can meet the diverse testing requirement of high-voltage high-power fuel stacks and low-voltage high-current discharges, so they are ideal fuel cell engine system testing instrument. Standard size and high power density design ensure easy integration and space saving. It also provides CAN/LAN/USB communication interfaces and CANOpen protocol in dbc format, which greatly improves the efficiency of secondary development.