The utilization of SunPower can be summed up in two aspects: solar energy utilization and sunlight utilization. Solar power generation is divided into photovoltaic power generation and photothermal power generation, among which photovoltaic power generation is the use of photovoltaic cells to directly convert solar energy into electrical energy. Photovoltaic power generation is far stronger than photothermal power generation in terms of conversion efficiency, equipment cost, and development prospects. Since the advent of practical polycrystalline silicon photovoltaic cells, the application of solar photovoltaic power generation has begun in the world.

At present, there are three development directions for solar photovoltaic power generation systems: independent operation, grid connected, and hybrid photovoltaic power generation systems. In an independent operating system, an energy storage unit is generally necessary, which can store the remaining electrical energy generated during sunlight for use when there is insufficient or no sunlight. At present, the demand for the international photovoltaic energy industry is starting to develop from remote rural areas and special applications to the direction of grid connected power generation combined with building power supply. Photovoltaic power generation has transitioned from supplementary energy to alternative energy. The domestic photovoltaic energy system is still mainly used in remote areas without electricity and independent photovoltaic power generation systems such as urban street lights, lawn lights, courtyard lights, and billboards. The energy storage system composed of battery packs can smooth out the electric energy fluctuation caused by the fluctuation of sunlight intensity, and can also compensate for the Voltage sag or sudden rise in the power grid system.

Wind power generation, as the fastest developing renewable energy generation technology, has broad application prospects. However, wind energy is a randomly changing energy source, and changes in wind speed can cause fluctuations in the output power of wind turbines, which can have an impact on the power quality of the power grid.

At present, the fluctuation of active power in wind power often adopts the method of directly adjusting the operating state of wind turbines to smooth out their output power, but the power regulation ability of this method is limited; Reactive power fluctuations are usually regulated by parallel static reactive power compensation devices, but reactive power compensation devices cannot suppress active power fluctuations. By adding energy storage devices, reactive power can be adjusted, the voltage of the wind farm bus can be stabilized, and active power can be adjusted over a wide range. Research on wind power generation has shown that fluctuating power at 0.01Hz-1Hz has the greatest impact on the power quality of the grid, and suppressing wind power fluctuations in this frequency band has the greatest impact on the power quality of the grid. To suppress wind power fluctuations in this frequency band, short-term energy storage can be used to achieve the goal. Therefore, small capacity energy storage equipment that can achieve short-term energy storage has high application value for wind power generation.