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2.5MW 10kV BESS PCS Container with High-Current DC Integration for Energy Storage Power Conversion System
2.5MW 10kV PCS Container for High-Current DC Integration
At the 2.5MW power level, the DC connection between battery storage and power conversion equipment becomes an important part of project engineering. Battery voltage, total current, DC protection and connection arrangements must be reviewed before the system design is finalized.
The Voltertech BESS-25MW-W is a transformer-isolated, AC-side power conversion container with 2500kW rated DC power, a 1000–1500V DC operating range and a specified maximum DC current of 2619A. Its AC interface is rated at 2500kVA and 10kV for medium-voltage energy storage projects.
THREE DC INTEGRATION PRIORITIES
01 / Voltage
Check the complete battery operating window against the PCS DC input range.
02 / Current
Review the total current and applicable limits of each DC connection.
03 / Protection
Coordinate the approved isolation and fault-protection arrangement.
Match Battery Voltage and PCS Operating Limits
The PCS specifies a DC operating voltage range of 1000–1500V. For battery selection, engineers should check the battery voltage at relevant states of charge, temperatures and operating conditions.
The maximum DC current is specified at 2619A. This value should be reviewed together with the rated conversion power and the manufacturer's operating capability data. It does not establish that full rated power is available at every voltage within the stated range.
Final system design should use the approved PCS voltage-current-power operating limits, rather than assuming that the maximum values can all occur simultaneously.
Review the DC Collection Arrangement
Large battery storage projects may involve multiple battery clusters or cabinets connected through a coordinated DC collection system. The exact arrangement depends on the selected battery equipment and approved PCS connection architecture.
Before designing a common DC bus, system integrators should confirm the number of permitted PCS inputs, terminal ratings, battery cluster characteristics and required protection equipment.
If external DC combiners or distribution equipment are required, their inclusion and technical specifications must be defined separately. They should not be assumed to be part of the standard PCS container.
Battery-to-PCS Interface Review
The following matrix highlights engineering information that should be exchanged before ordering a high-current PCS configuration.
| Design Area | Information to Verify |
|---|---|
| Battery DC Range | Minimum and maximum voltage under approved battery operating conditions |
| Connection Current | Rated and maximum currents, input topology and terminal limitations |
| DC Protection | Isolation arrangement, fault protection and approved coordination requirements |
| Battery Control | BMS communication protocol, operating permissions, faults and shutdown signals |
DC Cable, Busbar and Protection Coordination
High-current DC equipment requires project-specific cable and connection design. Cable selection depends on the actual current distribution, conductor arrangement, installation conditions and applicable electrical standards.
Engineers should also review the manufacturer's terminal drawings, available connection space, DC isolation requirements and the protection coordination between the battery system and PCS.
The 2619A maximum DC current should not be used as a standalone instruction for cable sizing or as the rating of an individual connection point.
Core Technical Specifications
| Parameter | Specification |
|---|---|
| Rated DC Power | 2500kW (2.5MW) |
| DC Operating Voltage | 1000–1500V |
| Maximum DC Current | 2619A |
| Rated AC Apparent Power | 2500kVA |
| Rated AC Voltage / Current | 10kV / 145A |
| Isolation Mode | Transformer Isolation |
| Power Factor / THD | -1 to +1 Adjustable / ≤3% at Rated Power |
| Battery Communication | CAN / RS485 |
| Dispatch Communication | Modbus RTU / TCP / IEC 60870-5-104 |
| Dimensions / Net Weight | 5523 × 2400 × 2800mm / Approx. 15000kg |
DC Interface Checks Before First Energization
Before the PCS and battery system are energized, qualified commissioning personnel should follow the approved test procedures and verify that the installed DC configuration matches the engineering drawings.
Electrical Documentation: Confirm approved DC diagrams, connection assignments and equipment protection requirements.
Battery and PCS Coordination: Verify the specified operating limits, communication functions and required interlocks.
Acceptance Records: Complete the applicable inspections and tests using the manufacturer's approved procedures before handover.
High-Current DC Integration FAQs
Q1. Does the 2619A maximum current apply to each DC input terminal?
The specification lists 2619A as maximum DC current but does not identify it as a per-terminal rating. The supplier's approved DC input drawing and terminal specifications are required to establish the permitted current for each connection.
Q2. Can multiple battery clusters connect to the same PCS DC input?
This depends on the approved PCS input topology, battery cluster compatibility, protection equipment and DC collection design. A multi-cluster connection should not be assumed without engineering confirmation.
Q3. Can the PCS maintain full 2.5MW conversion power at 1000V DC?
The 1000–1500V specification defines the stated DC voltage range. Full-power capability at a particular voltage requires confirmation using the approved voltage-current-power operating limits and any applicable derating information.
Q4. Are DC combiners, disconnect switches and protection devices included?
The available product specification does not fully identify the included external DC collection and protection equipment. Buyers should request a supply-scope list and approved connection drawings before ordering.
Q5. Which DC-side checks should be completed before commissioning?
The project team should verify the approved DC connections, battery operating limits, protective arrangements, BMS communication and required safety interlocks. Qualified personnel must perform the applicable inspections and tests according to approved commissioning procedures.
Review Your 2.5MW Battery-to-PCS DC Interface
Planning a utility-scale BESS power conversion project? Share your battery DC single-line diagram, operating voltage range, current requirements and proposed DC collection arrangement with Voltertech to discuss PCS compatibility, technical documentation and quotation options.
Request DC Interface Review & PCS Quotation2.5MW BESS PCS Container
,10kV Power Conversion System
,High-Current DC Integration PCS
Customer Service
- Email: info@voltertechenergy.com
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