Recently, the Solar-Storage-Charging Integrated Project constructed by Toyon Energy was officially connected to the grid, achieving a “zero-to-one breakthrough” for integrated solar-storage-charging projects in Funan County.
To address the challenges of insufficient parking spaces and charging facilities around BYD’s manufacturing park, one of the county’s key enterprises, the project adopts a model of “self-generation, self-consumption, surplus energy storage, and local charging supply.” It provides clean and convenient charging services for employees of surrounding enterprises and local residents, effectively alleviating the shortage of charging resources in the area.
The project is capable of achieving 100% self-consumption of generated electricity, delivering green power throughout the entire charging process.
691kWp Solar Carport: Providing Shade, Shelter, and Clean Energy
The project has a total installed capacity of 691kWp and utilizes 960 pieces of 720W high-power monocrystalline silicon modules. These modules are installed above the parking area, forming an open and aesthetically pleasing solar carport structure.
Compared with traditional open-air parking lots, the solar carport not only provides shade and protection from rain for parked vehicles but also transforms previously unused overhead space into a clean energy generation facility, realizing the concept of “dual-purpose land use by combining solar generation with parking.”
In terms of power generation performance, the project is expected to generate approximately 700,000 kWh of electricity annually in Funan County. This green electricity will be prioritized for supplying loads such as EV charging stations within the parking facility.
The adoption of high-power modules maximizes power generation density within the limited carport area, making the solution particularly suitable for the intensive redevelopment of ground-level parking facilities.
High-Efficiency Inverters and Intelligent Energy Storage: Coordinated Solar-Storage-Charging Operation
For the electrical system configuration, the project is equipped with:
- Five 110kW inverters
- One 40kW inverter
bringing the total inverter capacity to 590kW.
This configuration ensures that the photovoltaic system can efficiently and reliably convert DC electricity into AC power to supply charging stations and other site loads.
At the same time, the project deploys GoodWe 125kW/261kWh energy storage systems, with a total energy storage capacity of 522kWh.
The introduction of energy storage transforms the project from a conventional solar carport into a miniature energy station with intelligent dispatching capabilities.
Peak Shaving and Valley Filling
The system automatically stores photovoltaic power generation or low-cost grid electricity during off-peak electricity pricing periods and discharges during peak pricing periods to supply charging stations, significantly reducing operating electricity costs.
Smoothing Solar Power Output
The storage system helps address fluctuations caused by cloudy weather or changing solar irradiance during morning and evening hours, preventing sudden drops in photovoltaic output from affecting charging station stability and improving the overall charging experience.
Emergency Backup Power
In the event of short-term grid outages, the energy storage system can automatically switch to off-grid operation and provide temporary power for critical loads such as charging stations, lighting systems, and surveillance equipment, ensuring basic station operations.
Photovoltaic generation, energy storage, and charging stations operate in coordination through a local Energy Management System (EMS), forming a complete solar-storage-charging microgrid. Green electricity is generated and consumed locally, enhancing both the economic performance and power supply reliability of the project.
Toyon Energy: Empowering Green Mobility
As the EPC contractor of this project, Toyon Energy was responsible for all engineering phases, including:
- Solar carport construction
- Module and inverter selection and installation
- Energy storage system integration
- Grid connection and acceptance procedures
From construction through successful grid connection and power generation, the project overcame challenges such as site constraints and coordination among multiple disciplines, demonstrating Toyon Energy’s solid engineering capabilities in the fields of distributed photovoltaic systems, behind-the-meter energy storage, and integrated solar-storage-charging solutions.
As the first grid-connected solar-storage-charging integrated project in Funan County, the project has established a visible and practical green energy benchmark for the local community.
Looking ahead, Toyon Energy will continue to focus on solar-storage-charging application scenarios and provide high-quality engineering and construction services, helping more industrial parks, logistics hubs, and public parking facilities achieve energy transformation and ensuring that every kilowatt-hour of green electricity is utilized to its fullest potential.