What is the trend of integrated photovoltaic, storage and charging?

With the transformation of the global energy structure and the blooming development of the electric vehicle industry, people have gradually increased their demand for electricity and the requirements for the construction of charging stations. Currently, emerging markets such as Asia and South America have become the center of the growth of the number of new electric vehicles. In 2024, the total sales volume increased by more than 60% year-on-year, and the global electric vehicle sales volume also increased by about 25% year-on-year in the same year. In 2025, global electric vehicle sales are expected to exceed 20 million, accounting for more than 25% of global car sales. However, in comparison, charging infrastructure, as an important "refueling station" for new energy vehicles, has a slower growth rate. Since traditional charging stations still have many shortcomings , such as slow charging speed, high operating costs, high installation requirements, etc., which has gradually deepened our desire for new power systems. Therefore, the integrated photovoltaic storage and charging solution will become an important trend in future development.

First of all, photovoltaic storage and charging integration is a comprehensive new energy solution that integrates photovoltaic power generation, energy storage system and charging system. The working principle of photovoltaic storage and charging integration is to use photovoltaic power generation, and the surplus power is stored by energy storage equipment, and they jointly undertake the task of power supply and charging; through the coordinated operation of the intelligent control system, photovoltaic storage and charging integration can realize the multi-energy efficient cycle of "power generation-distribution-storage-charging", forming a closed-loop system of self-generation and self-use of clean energy, surplus power storage, and intelligent scheduling, realizing multi-energy complementary, stable and efficient, green and environmentally friendly energy utilization.By directly utilizing solar energy to charge new energy vehicles, we reduce our reliance on traditional fossil fuels and achieve true green car charging with green electricity.

As an important direction for the integration of new energy and infrastructure, photovoltaic storage and charging integration has multiple profit channels. It can reduce operating costs through profit models such as charging service fees, photovoltaic power sales to energy storage arbitrage, and can also form new profit models by exploring new projects such as grid interaction, advertising cooperation, and carbon trading. This greatly reduces its operating costs and sales prices, making manufacturers more competitive in the market. With the iteration of technology and the upgrading of the industry, the cost of photovoltaic modules and energy storage units is also continuously decreasing. According to industry data, the current unit power investment cost of integrated photovoltaic storage and charging stations has been reduced by nearly 70% compared with five years ago. With the cost reduction of GWh-level energy storage systems (expected to drop to $110/kWh in 2025) and the popularization of V2G technology, its economic and functional advantages will be further magnified.

The integrated photovoltaic power station can flexibly dispatch electricity according to different charging needs and grid conditions. When the power demand fluctuates greatly, the energy storage system can effectively adjust the power supply, reduce the pressure on the grid, and support the stable operation of the grid. It is very suitable for the diverse electricity needs of cities, rural areas and remote areas. For example, a successful trial operation of an integrated power station for intelligent charging, swapping, storage and discharge of electric vehicles has been carried out in a certain place in Shandong. The power station can charge 120pcs electric buses at the same time, and the supporting centralized charging station can charge 360pcs passenger cars at the same time, and can meet the battery replacement needs of 280pcs buses at the same time. In terms of storage and discharge functions, the discharge power of the bus charging and swapping station is 700kW (peak value can reach 4.2MW), the maximum energy storage power of the centralized charging station can reach 4.32MW, and the battery cascade utilization storage and discharge power is 2MW. The integrated power station stores electricity during off-peak hours and releases electricity to the grid during peak power consumption and emergency moments. The peak and valley regulation load is 7.02MW (peak value can reach 10.52MW).

In the future, with the acceleration of the construction of new power markets and the implementation of technologies such as V2G, the demand for integrated photovoltaic storage and charging will continue to rise. In response to this trend, Maxwell will provide customers from various countries with V2G 22KW 1000V modules and bidirectional 50KW 1000V/1500V DCDC and other module solutions to help everyone accelerate the deployment of new energy and inject strong momentum into the realization of the "dual carbon" goal and the construction of new power systems.