With the rapid development of renewable energy and the widespread adoption of electric vehicles, the power sector, industrial and commercial users, and residential consumers are facing challenges such as electricity price fluctuations, peak-period supply shortages, and the waste of wind and solar resources. How to build a stable and reliable green power supply on the user side has become a critical issue in promoting the sustainable use of energy.
Integrated PV, Storage, and Charging System is emerging as a key technical solution to effectively address the aforementioned challenges, while also serving as a flexible regulation unit supporting the new-type power system. Empowered by continuously innovating power electronics technology, such integrated solutions are further driving the energy transition from "low-carbon" toward "zero-carbon."
Integrated PV, Storage, and Charging System successfully achieves a synergistic effect where 1+1+1 > 3
As early as 2020, the State Council's "Development plan for the new energy vehicle industry (2021–2035)" first proposed the construction of Integrated PV-Storage-Charging-Discharging Stations. Since then, factors such as the widening peak-valley electricity price differential, the implementation of local subsidies, and the piloting of V2G technology have propelled the integrated PV, storage, and charging system into a phase of rapid development.
Traditional distributed PV power generation, energy storage, and electric vehicle charging facilities are often managed independently, leading to significant operational limitations. In contrast, Integrated PV Storage Charging Stations establish a coordinated microgrid system that comprehensively covers electricity production, storage, and discharge. These stations also enable efficient interaction with the main power grid, allowing for flexible energy dispatch. This approach effectively addresses challenges such as the integration of distributed renewable energy and the stability of the power grid.
PV + Energy Storage | Energy Storage + Charging Coordination |
The intermittency and variability of PV power generation are effectively balanced through the charging and discharging regulation mechanisms of energy storage systems, thereby enhancing power quality and optimizing energy utilization efficiency. | It addresses the challenges of capacity expansion at regional charging stations, alleviates grid pressure, reduces operational costs, and enhances charging efficiency. |
With the accelerated global energy transition and the development of a low-carbon economy, integrated PV-storage-charging solutions are gaining broad prospects for growth. Currently, this technology has been widely applied in typical settings such as highway service areas, industrial and commercial parks, and core urban CBDs. It effectively enables "self-generation and self-consumption, with surplus electricity fed into the grid," thereby supporting efficient energy utilization and promoting green transportation.
The deep integration of power electronics across the entire chain has effectively unblocked the key pathways for the PV-storage-charging integration system
PV, energy storage, and charging facilities can exist independently. However, to form an efficient, flexible, and organically coordinated integrated PV storage charging system, the deep penetration of power electronics across the entire chain is an indispensable core technology. It essentially unlocks the key pathways for the entire PV storage charging ecosystem, enabling smarter, more efficient, and safer energy flow.
Weiguang Energy, a subsidiary of BPG based in Xi'an, independently develops core products such as power routers (also known as SST or PET), module-level battery controller, PCS, energy storage system integration,and EMS. Leveraging technologies in power electronics, electrochemistry, and digital-intelligent control, these solutions establish safe and economical energy storage and supercharging matrices for PV Storage Charging application scenarios, expanding the potential for green and smart energy across more use cases.
Power routers
Technological Innovation | Efficient Transmission | Smart Regulation
The industry has pioneered a cost-effective and compact topology technology based on a hybrid three-level architecture, significantly reducing costs. By utilizing SiC materials in core components, the system's cyclic efficiency has been markedly enhanced. Compared to traditional industrial frequency transformers, this innovation enables direct conversion between different current types, voltages, and frequencies, achieving measurable, monitorable, controllable, and adjustable power management
Module-level battery controller
Precision Control | Smart Alerts | Proactive Safety
Featuring proprietary hybrid topology architecture, deeply integrated with BMU, the system supports personalized charging and discharging at the battery module level. This effectively addresses capacity loss and safety risks caused by inconsistencies among battery cells after grouping. Equipped with self-developed SOX balancing technology and EIS-based proactive safety warnings, it enables early detection, diagnosis, and isolation of potential battery issues, ensuring continued operation even in the event of individual cell failures.
Power Conversion System (PCS)
High-Efficiency Conversion | Advanced Performance | Comprehensive Functionality
As the power conversion interface between the grid and energy storage batteries, it features high-efficiency bidirectional conversion capability. By precisely controlling the charging and discharging of the energy storage battery system, it enables flexible power dispatch among the battery, loads, and the grid, ensuring stable operation of the energy storage system under varying working conditions.
Third generation energy storage system
Safe & Reliable | Low Power Consumption | Smart Operations
The cabinet-type energy storage system integrates matrix power electronic battery stacks, PCS, thermal management systems, and fire safety systems into a unified solution. It is suitable for applications such as industrial and commercial energy storage, as well as grid-side or source-side energy storage. With safety as its core priority, the system leverages self-developed module-level battery controllers to enable proactive safety management and module-level online bypass capabilities.
Cloud-based energy management system(Cloud EMS)
Energy Interconnection | Comprehensive Monitoring | Multi-Dimensional Security
Leveraging station-edge acquisition control gateways, advanced edge control algorithms, and digital twin visualization technologies, the system ensures rapid response to monitoring requirements of power stations. Moreover, cloud-edge collaboration enhances the operational lifespan of core equipment, reduces maintenance costs, and enables online customization of strategies such as peak shaving, valley filling, and demand management, thereby boosting power station revenue.
Break the Binary Choice between Safety and Economy
By fully implementing deep power electronics integration across the entire chain, the system enhances the conversion efficiency of the energy storage system, enables more refined battery management, builds a safer system architecture, and achieves faster grid support capabilities. Furthermore, it significantly reduces the LCOE and shortens the investment payback period.
Meeting demands for high efficiency and ultra-fast charging
Utilizing an efficient and streamlined DC architecture with fully modular design, the system achieves both high performance and flexibility. The decoupled design of charging power and terminal interfaces enables flexible power allocation and sharing across terminals. With efficient DC integration for energy storage and PV sources, it delivers a comprehensive, simple, ultra-fast, and highly efficient charging experience.
Industry-first project successfully implemented, pioneering a new paradigm for Integrated PV-Storage-Charging Systems
Ultra-Fast Hybrid Charging Station
CNPC Suzhou Kunshan Development Zone
The project is equipped with a 10 kV power router device, along with 480kW liquid-cooled supercharging terminals and 120kW dual-port fast-charging terminals, capable of simultaneously providing efficient energy replenishment for over ten new energy vehicles. Leveraging flexible charging technology, it smartly adjusts charging power based on load conditions to minimize energy loss and supports real-time coordination between vehicles, charging points, stations, and the grid. This setup meets the plug-and-charge needs of high-power vehicles and enhances overall charging efficiency and user experience.
PEDF charging station
Guangdong Jiangmen Highway Service Area
The project utilizes two power routers to enable full DC integration of PV systems, energy storage units, and charging piles. By adopting a common DC bus technology, it enables bidirectional interconnection of the10 kV feeder loops in the service areas, providing dual power supply with mutual backup to enhance grid reliability. Additionally, it actively regulates bidirectional power flow and supports dynamic capacity expansion, thereby increasing equipment utilization and addressing the issue of limited capacity in service areas.
BPG PEDF Charging New Distribution Network Research and Demonstration Project
BPG Technology Building
The project centers on power routers as the core equipment, connecting to the 10 kV AC distribution network and directly converting 10 kV AC power to 750 V DC power supply. It integrates distributed PV, new type of energy storage, DC power distribution, and smart flexible control technologies, adopting a "Source-Grid-Network-Load-Storage Integration" model that supports multi-scenario charging, including ultra-fast charging, fast charging, and V2G. Leveraging a fully proprietary integrated energy management system platform, it enables interaction between the PEDF charging scenario and the conventional electricity consumption of the building.
BPG focuses on the forefront of power electronics technology, driving collaborative innovation with its subsidiaries. From PV power station construction to breakthroughs in energy storage technology, and further to the refinement of smart charging networks, BPG supports the transformation and upgrading of the energy structure across the entire chain. It continues to promote the innovation and implementation of integrated PV storage charging solutions for industrial and commercial applications. In the future, BPG will remain committed to driving industrial development through technological innovation, accelerating the establishment of a new green and smart energy ecosystem.
