HEXING’s MV Power Conversion Unit helps reduce coordination work between packages. It makes the path from battery-side DC power to the medium-voltage network clearer.
For an energy storage project, selecting the battery is only one part of the work. The project team must connect the DC system to the MV network. They also need to coordinate protection and control. Equipment interfaces need to be defined. They should ensure that all packages work well together during commissioning and operation.
When the PCS, transformer, MV switchgear, auxiliary power equipment, and communication system are supplied separately, each connection creates a new design and delivery task. Drawings need to be aligned. Cables have to be routed. Protection boundaries must be confirmed. Also, several suppliers may need to respond if an issue comes up.
The Customer Problem: Integration Work Grows with Every Separate Package
Separate packages offer flexibility. However, they also shift more integration tasks to the developer, EPC contractor, or system integrator. A change in battery voltage, transformer design, grid voltage, switchgear setup, or plant communication can impact multiple parties at once.
Even if each part meets its specs, the whole battery-to-grid system must work together as one unit. The customer, therefore, needs more than individual equipment. The real requirement is a manageable interface from the battery side to the MV grid.
How HEXING’s MV Power Conversion Unit Coordinates the Battery-to-Grid Platform
HEXING’s MV Power Conversion Unit combines the main functions of the battery system and the medium-voltage network in one coordinated platform. The solution features a bidirectional PCS. It also has a step-up transformer. There’s MV switchgear included, too. Lastly, it comes with a communication and auxiliary power cabinet.
Power conversion and voltage step-up work together. So do switching, protection interfaces, auxiliary supply, and plant communication. They all fit into one system architecture. The project team can simplify things. They can simplify by using one solution for the main battery-to-grid interface. This way, they won’t need to manage many separate packages. It also creates a single path for technical coordination.
| 1.25 / 2.5 / 5 MW SYSTEM POWER | 12–40.5 kV MV RANGE | 1000–1500 V DC DC OPERATING RANGE |
Benefits for Developers, EPC Contractors, and System Integrators:
| • Fewer major equipment boundaries to define during system design. • Less cross-vendor coordination for conversion, step-up, switching, and communication. • A clearer responsibility interface when technical questions or changes arise. • More organized planning for cable routing, installation preparation, and commissioning. |
The value of integration is not simply that several components share one frame. The main benefit is that the battery-to-grid interface can be planned as one coordinated system. This can help reduce disconnected design decisions, improve visibility, and make site activities easier to prepare.
Where This MV Power Conversion Unit Approach Fits
The platform is great for energy storage developers, EPC contractors, and system integrators. It helps them connect battery-side DC power to an MV network more easily. It can be configured for utility-scale BESS, standalone energy storage plants, renewable energy and storage projects, user-side storage, and microgrids.
Final transformer ratios, switchgear setups, system sizes, communication plans, and cooling configurations are set. They are based on project needs and the final technical solution. This allows customers to keep project-specific flexibility without managing the main conversion and step-up functions as unrelated packages.
Questions to Confirm Early for BESS Battery-to-Grid Integration
| PROJECT DISCUSSION CHECKLIST • Required system power and battery-side DC voltage range. • Medium-voltage connection level and transformer ratio. • Protection, switchgear, and technical responsibility boundaries. • Site layout, cooling, environmental, and communication requirements. |
| Trying to reduce equipment interfaces in your storage project? Talk to HEXING about the battery voltage, system power, MV connection, site conditions, and technical responsibility boundaries. |
