Why SolarEdge and Infineon’s SiC-Based Solid-State Transformer Matters

SolarEdge and Infineon are collaborating on developing a high-efficiency Solid-State Transformer (SST) for massive AI data centers. By combining SolarEdge's DC power conversion expertise with Infineon's leading Silicon Carbide (SiC) technology, they aim to streamline power delivery, boost efficiency past 99%, and support the emerging high-voltage DC architectures crucial for power-hungry compute infrastructure.

The rise of AI is stressing global power infrastructure. The energy demands of hyperscale data centers, especially those packed with high-power GPUs, require a fundamental change in how power is delivered.

This is the context for the new collaboration between SolarEdge and Infineon.

They aren't just making a slightly better component; they are advancing a core architecture that will define the next generation of data center power: the Solid-State Transformer (SST).

The Technical Upgrade: SiC Meets DC Architecture

The central piece of this partnership is the joint development of a modular 2–5 MW SST building block. This technology is designed to solve a critical efficiency problem.

Here are the facts:

• The Technology: The SST combines SolarEdge’s established DC power conversion and control topology with Infineon’s high-performance Silicon Carbide (SiC) switching technology.

• The Performance: The goal is to deliver power conversion efficiency exceeding 99%.

• The Pathway: This system enables a direct, single-step conversion from the public grid's medium-voltage (13.8–34.5 kV) down to the high-voltage DC distribution needed for modern compute racks (800–1500V DC).

SiC is the key enabler here. Its superior thermal and switching properties over traditional silicon are essential for handling the immense power densities and minimizing losses required to hit that >99% efficiency target.

Why Efficiency is Everything in the AI Era

For data center operators, power efficiency is directly tied to both capital expenditure and operational costs.

The technical benefits of this SST approach translate directly into business and engineering advantages:

1. Reduced Footprint: By eliminating massive, bulky low-frequency transformers, the SST significantly reduces the size and weight of the power distribution equipment. This means less floor space and easier deployment.

2. Lower Operating Cost: Every percentage point of efficiency gain is critical. Pushing beyond 99% conversion reduces heat generation, which in turn lowers cooling requirements, one of the largest hidden operational expenses in a data center.

3. Future-Proofing: This design supports the emerging, highly efficient 800 Volt DC power architectures, providing a more reliable and scalable foundation for power-hungry AI clusters.

SolarEdge is leveraging its decade-plus of experience in DC-coupled solar architecture, where maximizing DC efficiency is paramount, to enter the data center market.

Partnering with a semiconductor powerhouse like Infineon, which offers a full portfolio of Si, SiC, and GaN solutions, allows for the precise, high-performance power conversion necessary to meet the demands of AI.

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The collaboration is a direct engineering response to the escalating power requirements of modern computing. It represents a significant step toward a more efficient, scalable, and sustainable foundation for the AI revolution.

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