With a construction area of 62,900 square meters, the "Light storage Direct and soft" application demonstration project of the future Building of Shenzhen Construction Science and Technology Institute is positioned as a green three-star building and a net zero energy building in hot summer and warm winter areas. It adopts passive energy-saving technology of ventilation and shading, "light storage direct and soft" technology based on DC power distribution, and "virtual power plant" technology that interacts with the power grid. The project is jointly developed and constructed by BBE GROUP, Shenzhen Institute of Construction Science and Technology, Tsinghua University, Shenzhen Power Supply Bureau of Southern Power Grid, Lawrence Berkeley Laboratory and other more than 20 units. It is the first full DC building project that has been applied in large-scale laboratories in China.

Based on low-voltage DC power distribution technology, the project builds a "light storage direct and flexible" system that integrates rooftop photovoltaic, a variety of building distributed energy storage and DC electrical appliances, and adopts adaptive control technology based on DC bus voltage. It solves the problems of random output, energy storage and photovoltaic coupling control stability of traditional AC grid-connected photovoltaic system, and is especially suitable for the requirements of diversified load demand and large-scale access of distributed new energy.

On the basis of load flexibility adjustment through the "light storage direct and flexible" system, the project as the first users access to the Shenzhen virtual power plant management platform, the development of building virtual power plant aggregation sub-platform, aggregation of distributed photovoltaic, centralized energy storage, air conditioning and bidirectional charging pile and other flexible adjustment resources, to achieve building demand response function.

The energy consumption per unit area of the project is significantly lower than that of similar office buildings, and the average electricity price per kWh in 2022 will be reduced to 0.46 yuan /kWh, which is more than 40% lower than the average electricity price of industrial and commercial users in Shenzhen in the same period, and the environmental and economic benefits are significant.