Preamble

Against the backdrop of accelerating global energy transformation, the Kunshan Lu Yang Middle School DC Charging Station project, invested and constructed by PetroChina Jiangsu Suzhou Sales Branch, has recently been officially commissioned. For this project, WG Energy demonstrated outstanding execution capability by completing the delivery and system integration of the core intelligent component—a 1000kW charging Solid-State Transformer (SST) along with one 385kWh DC storage cabinet—within a rapid three-day timeframe. This achievement showcases the company’s strong technical strength and project execution capabilities, marking a successful model of collaboration between a traditional energy enterprise and an innovative technology provider in driving green development.

01

SST
The “Smart Brain” of the PV-Storage-Charging System

WG Energy’s SST plays an irreplaceable core role in this project:

Efficiently utilizes on-site green power: Intelligently manages the 800 kW PV system installed on the school rooftop, achieving a closed-loop energy cycle of “self-consumption and surplus storage”.

Smart multi-energy flow management: As the energy hub, it enables real-time coordination of PV generation, storage, grid power, and charging loads, ensuring optimal energy distribution.

Direct 10 kV high-voltage grid connection: Eliminates the need for traditional power transformers, achieves an impressive system efficiency of 98.5%, and significantly improves overall energy utilization.

02

Tri-Brid Energy Architecture
SST Empowers the Campus Charging Station

This project establishes a tri-brid smart energy system integrating “rooftop PV + battery storage + intelligent charging”:

Efficient PV utilization: The SST prioritizes the 800 kW rooftop PV power generated on campus, directing it to charging terminals to maximize on-site consumption of clean energy.

Intelligent storage control: Through coordinated operation with the 385 kW DC storage cabinet, the SST enables temporal and spatial shifting of energy, balancing generation and demand.

Smart charging management: Charging power is dynamically allocated based on real-time PV output, maximizing the utilization of green electricity.

03 

Delivery Speed Creates Value Beyond Expectations

Early Operation, Early Returns: A charging station is an operational asset—every day delayed translates directly into lost revenue and profit. Completing delivery months ahead of schedule effectively secures several months of pure profit for the customer, significantly improving the project's internal rate of return (IRR) and accelerating the payback period.

Seizing Market Opportunities: In the rapidly evolving charging infrastructure market, site selection is critical. Rapid delivery enabled PetroChina to quickly establish a presence at the premium Lu Yang Middle School location, locking in users among faculty, students, and the surrounding community, while strengthening its regional brand presence.

Substantially Reducing Hidden Costs: The longer a project cycle, the greater the exposure to external risks—such as weather, policy fluctuations, or supply chain disruptions. Rapid delivery acts as a “blitz,” minimizing the project’s exposure to uncertainty and ensuring delivery certainty.

Behind WG Energy’s fast delivery lies a collaborative team distinguished by highly standardized technology, modular product design, and meticulous project management. More importantly, it reflects a strong commitment to the customer, embodying WG Energy’s ethos of “delivering on every promise.”

The successful implementation of the Kunshan Lu Yang Middle School Charging Station project validates the practical value of the Solid-State Transformer (SST). WG Energy’s 3-day rapid delivery model establishes a replicable benchmark for energy upgrades at charging stations across the country. The PV-storage-charging integrated project, anchored by the SST as the smart dispatching hub, has also significantly reduced electricity costs for the campus, serving as a vivid learning platform for green education among teachers and students.

Looking ahead, WG Energy will continue to drive innovation in SST technology, accelerating the intelligent energy transformation of more EV charging stations, campuses, and industrial parks. The company remains committed to contributing to the development of a clean, low-carbon, safe, and efficient modern energy system.