The integrated system adopts a hybrid bus architecture. The photovoltaic, energy storage, and charging are connected to the DC bus. The system adopts a distributed design and is composed of power cabinet, battery cabinet and charging terminals, which is convenient to flexibly deploy charging power and energy storage capacity according to the actual application scenario. This system is widely used in the charging scene with insufficient power distribution capacity and large price difference between Peak-Valley, which brings dynamic capacity to customers and the value of peak-valley arbitrage to customers.

The characteristic of electric vehicle charging is that the charging power is large and the impact on the power grid is large, but the total power consumption is not large. As the number of electric vehicles increases and the charging power becomes larger and larger, charging stations are required to increase the number and power of charging piles, which requires increasing power distribution capacity. The traditional way is to add distribution transformers, but the cost is high and the actual utilization rate of the transformers is low. The best way is to configure an energy storage system to achieve dynamic capacity expansion.