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PCS Power Conversion Systems

2 Product Series · 8 Models available

Power conversion systems (PCS) are the bidirectional heart of a storage plant, converting DC from the battery to grid AC for discharge and back again for charging. QDTB PCS units span 5 kW to 500 kW in low-voltage and high-voltage DC platforms, with peak efficiencies above 98 %, fast charge/discharge response and full grid-forming capability. Built-in transfer switches and black-start functions let a storage system ride through outages and rebuild an islanded grid, while standard CAN and Modbus interfaces hand control to the energy management system. They pair directly with our battery clusters and fire-suppression systems to form complete, code-compliant storage solutions.

Product Series

Available Models

ISO

Certified Quality

Specifications Range

All specifications and dimensions can be customized upon request

Key parameters	Model Range
Rated Power	5–500 kW
DC Voltage Range	150~750, 600~1000, 900~1500
AC Voltage	380 V, 480 V
Max Efficiency	98–99 %
Topology	Two-level bidirectional, Three-level bidirectional
Protection Level	IP20, IP54

Available Series

PCS-LV

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PCS-LV Series — Low-Voltage Bidirectional Converters

Low-voltage PCS units from 5 to 50 kW pair with 48 V or low-DC battery banks for residential and small commercial storage, with seamless grid-tie to off-grid transfer.

3 models

PCS-HV

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PCS-HV Series — High-Voltage Grid-Forming Converters

High-voltage PCS from 50 to 500 kW drive containerised and utility storage, offering high efficiency, fast response and full grid-forming capability.

5 models

Application Scenarios

Commercial & Industrial Storage

PCS units sized to the battery cluster for peak-shaving and demand-charge reduction.

Grid Frequency & Peak Regulation

Fast bidirectional response supports frequency regulation and reserve services.

Microgrids & Off-Grid

Grid-forming PCS with black-start keeps an islanded network stable without a utility reference.

Renewable Smoothing

Absorbs short-term PV or wind fluctuations to keep output within grid-code limits.

Containerised BESS

High-power PCS racks integrated with battery clusters inside energy storage containers.

Backup & UPS

Instantaneous switchover supplies critical loads from the battery during grid failure.

Technical Advantages

Bidirectional Conversion

Single unit charges and discharges the battery with controlled AC/DC and DC/AC flow.

Grid-Forming Capability

Black-start and islanding functions rebuild a stable voltage and frequency reference.

98 %+ Peak Efficiency

Low-loss IGBT and SiC power stages minimise round-trip energy loss.

Fast Response

Millisecond-scale power response supports frequency regulation and transient support.

Frequently Asked Questions

How is a PCS different from a grid-tie inverter?

A grid-tie inverter only feeds PV power into the grid; a PCS is bidirectional, charging and discharging a battery, and it can form a grid in off-grid mode.

What is black-start capability?

The ability to energise a de-energised network from the battery without an external grid reference, essential for microgrids and outage recovery.

Which DC voltage platform should I choose?

Low-voltage PCS suits small systems with 48 V or low-DC banks; high-voltage PCS pairs with 750 V+ battery clusters for lower current and higher efficiency.

How fast does the PCS respond?

Power output can ramp within milliseconds, qualifying it for frequency regulation and fast reserve markets.

Can one PCS serve both grid-tie and off-grid modes?

Yes, our PCS switches seamlessly between grid-following and grid-forming operation based on system state.

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