Wind power and photovoltaics belong to the core track of green new energy. The equipment operates outdoors all year round, with complex working conditions and extremely long continuous working hours. It has extreme requirements for the energy consumption loss, weather resistance, and stability of the magnetic core. As the core component of inverters, converters, and energy storage devices, the loss of magnetic cores directly determines the overall power generation efficiency and maintenance costs of the machine. Low loss amorphous and nanocrystalline magnetic cores can effectively reduce equipment heat loss, improve photovoltaic and wind power conversion efficiency, reduce equipment failure frequency, and significantly reduce outdoor equipment operation and maintenance costs. At the same time, high-quality magnetic cores can adapt to complex outdoor environments such as high and low temperatures, humidity, and sandstorms, and their long-term performance will not deteriorate. Under the trend of cost reduction and efficiency improvement in new energy, low loss, high stability, and long-life magnetic cores have become the core standard for upgrading wind and photovoltaic equipment.