Hybrid Power Architecture for AI Data Centers

Higher efficiency. Independent backup.

Hybrid power architecture for seamless continuity

across next-generation AI data centers.

Why Traditional Dual UPS Architecture Is No Longer Enough

For decades, dual UPS systems have been the standard approach for mission-critical facilities. While they provide redundancy, both power paths rely on the same technology and follow nearly identical power conversion processes.

As AI data centers continue to demand higher efficiency, greater power density, and lower operating costs, conventional architectures introduce several limitations.

Multiple Conversion Stages

Power is repeatedly converted between AC and DC, reducing overall system efficiency.



Higher Operating Cost

Two identical UPS systems may share similar hardware, software, and control architectures, increasing the possibility of common failure mechanisms.

Common-Mode Failure Risk

Two identical UPS systems may share similar hardware, software, and control architectures, increasing the possibility of common failure mechanisms.

Limited Future Scalability

Traditional low-voltage AC distribution becomes increasingly challenging as rack power density continues to grow.

Traditional Power Architecture for AI Data Center
ETAC Hybrid Power Architecture

ETAC Hybrid Power Architecture

Instead of relying on two identical UPS systems, ETAC combines two fundamentally different power technologies into one integrated architecture.

The SST branch serves as the primary high-efficiency power path, while the UPS branch remains fully energized as an independent backup system.

Both power paths are connected through a DC Static Transfer Switch (DC STS), allowing seamless transfer without interrupting critical IT operations.

Learn more about ETAC’s Solid-State Transformer platform.

How the Hybrid Architecture Works

Normal

The SST branch supplies the entire IT load during normal operation, maximizing system efficiency while the UPS remains energized in standby.

Fault

If the SST path experiences a fault, the DC STS immediately transfers the load to the UPS path without interrupting power to critical equipment.

Maintenance

Either power path can independently support the full load, allowing maintenance activities without shutting down the data center.

Why Choose a Hybrid Power Architecture

Higher Efficiency

The SST branch eliminates multiple AC/DC conversion stages found in traditional UPS architectures, reducing energy losses and improving overall efficiency.

Independent Backup

Because SST and UPS use fundamentally different technologies, failures affecting one system are unlikely to impact the other.

Lower Operating Cost

Higher efficiency translates directly into reduced electricity consumption and lower cooling requirements throughout the facility lifecycle.

Future-Ready Infrastructure

Native support for 800VDC distribution enables higher rack power density and prepares facilities for next-generation AI computing platforms.

Seamless Power Transfer

High-speed DC STS technology provides uninterrupted power transfer during equipment faults or planned maintenance.

ETAC Scope of Supply

ETAC provides complete engineering support and equipment supply for hybrid power systems, including:

Applications

Designed to support a wide range of mission-critical power applications across modern industries.

Ready to Build Your Next-Generation AI Power Infrastructure?

Whether you’re designing a new AI data center or upgrading an existing facility, ETAC can help you implement a more efficient, more reliable, and future-ready power architecture.