Solid-state transformer prototype efficiency at 400 kW (13.2 kV AC → 800 VDC), ETH Zurich prototype presented at INTELEC 2025 as reported by SemiAnalysis; 98.0–98.5% is today’s state of the art and 99% the stated next target
~98%estimate
| Value kind | estimate — Interpret this value according to its displayed kind, scope, source, and as-of date. |
|---|---|
| Scope | Reported prototype figure at 400 kW; conversion boundaries and loading are those of the INTELEC 2025 paper, which was not opened — not a primary test report and not a product listing (no vendor had completed UL certification for data-center SST deployment as of May 2026). Use as an architecture screening point; qualify the offered assembly at the same output boundary before procurement. |
| As of | 2025 |
| Source | SemiAnalysis, Inside the 800VDC Revolution, Part 1 (2026-05-26), reporting the ETH Zurich INTELEC 2025 prototype · “The best public SST benchmark comes from ETH Zurich: 98% efficiency at 400kW in a 13.2kVAC-to-800VDC prototype presented at INTELEC 2025”; Kolar 98.0–98.5% state of the art, 99% next target |
| Review | checking…review by 2026-10-25 · standard cadence |
| Recorded changes | last 2026-09-16 · 6 revisions tracked |
| Claim id | solid-state-transformer-efficiency-at-400-kw-13-2 |
Where the guide uses it
- 4.1 Power Topology Foundations & Voltage Selection
- 4.4 Transformers, Harmonics & the AI Non-Linear-Load Problem
- 4.7 The DC Power Revolution: 48V → ±400V → 800V & Disaggregated Sidecar Power
← Full numbers register — every date-stamped figure in the guide, with revision history.