Jining Zoucheng Heavy-duty Truck Charging Station Project

Jining Zoucheng Heavy-duty Truck Charging Station Project

In early 2025, DHDL successfully delivered one S-8000/33 oil-immersed distribution transformer for a power distribution expansion project in an industrial park in eastern Thailand. The project helped the customer increase power supply capacity, improve distribution stability, and support the growing electricity demand of new factories and production lines.

Project Background

With the rapid adoption of new energy heavy-duty trucks in coal transportation, port logistics and bulk cargo transportation, the demand for high-power charging infrastructure in Zoucheng, Jining continued to grow.

The project is located in a core industrial logistics area of Zoucheng, surrounded by coal transportation companies and logistics parks. As the number of new energy heavy-duty trucks increased, the station operator estimated that peak daily charging demand could exceed 300 charging sessions.

To meet long-term operation needs for the next five years and beyond, the project adopted an integrated energy station design combining ultra-fast charging, energy storage and photovoltaic power generation.

Products Used in This Project

Customer Challenges

Why the Customer Chose DHDL

After several rounds of technical communication and solution comparison, the customer selected DHDL as the main power equipment supplier for this project.

DHDL was able to provide not only 35kV main transformers, but also box-type substations, energy storage step-up equipment, photovoltaic modules, DC charging piles and intelligent operation support for an integrated solar-storage-charging station.

With previous experience in integrated photovoltaic, energy storage and charging projects, DHDL helped the customer optimize the overall power supply structure according to the actual operation scenario.

DHDL Solution

To address the high-power charging load, DHDL designed a power supply architecture consisting of two 20MVA main transformers and sixteen 2500kVA box-type substations. This structure improved power distribution capacity while reducing the risk of single-point failure.

To reduce operating costs, the project was equipped with a 4MWp photovoltaic system and a 10MW / 20MWh energy storage system. During the daytime, photovoltaic power is prioritized for charging operation. At night, the storage system can be charged with valley electricity. During peak hours, the storage system discharges to support charging loads and reduce overall electricity costs.

To ensure project delivery, DHDL established a dedicated production team to track the entire process from drawing confirmation and production scheduling to equipment shipment, helping the customer keep the project on schedule.

Delivery Timeline

The project started equipment procurement in November 2025. The main transformer production cycle was 45 days, the box-type substation production cycle was 35 days, and the energy storage system production cycle was 40 days.

The first batch of equipment was shipped on the 38th day after contract signing. All equipment was delivered within 60 days, and the overall equipment arrival was completed 7 days ahead of the planned schedule.

Customer Feedback

After the project was put into operation, the station achieved a maximum daily charging volume of more than 80,000kWh. The main transformers and box-type substations operated normally, and the energy storage system effectively reduced electricity costs during peak periods. The customer stated that DHDL provided not only equipment, but a complete power distribution solution for the project.

Follow-up Cooperation

After stable operation of the project, both parties established a long-term cooperation relationship. In early 2026, the customer began planning the second phase of the Zoucheng heavy-duty truck energy supply station, and DHDL continued to participate in the preliminary power distribution solution design.

The two parties are also discussing future energy storage expansion. Further cooperation is expected in heavy-duty truck charging stations, solar-storage-charging integrated projects and new energy infrastructure development.

Delivery and Result

The production order was officially released in March 2025. From material preparation to final factory testing, the whole process took 38 days. After testing was completed, the transformer was shipped by sea to Laem Chabang Port in Thailand.

The project was completed five days earlier than the contractual delivery schedule. After the equipment arrived on site, it was successfully installed, energized, and put into operation.

After one month of operation, the customer reported that the transformer was running stably and all operating parameters met the design requirements. The customer also recognized DHDL’s communication efficiency, especially the regular production updates and test reports provided during project execution.

Follow-up Cooperation

After stable operation of the project, both parties established a long-term cooperation relationship. In early 2026, the customer began planning the second phase of the Zoucheng heavy-duty truck energy supply station, and DHDL continued to participate in the preliminary power distribution solution design.

The two parties are also discussing future energy storage expansion. Further cooperation is expected in heavy-duty truck charging stations, solar-storage-charging integrated projects and new energy infrastructure development.