The OCP Solid State Transformer Specification (Rev 0.3.0, effective 2026-06-22; authors Google, Microsoft, NVIDIA) requires at least 98% efficiency between 50% and 100% utilization, counting power-train loss only.
≥98%observed
| Value kind | observed — Reported measurements, counts, and specifications keep the precision and scope stated by their source; an exact specification is not treated as a range. |
|---|---|
| Scope | A requirement in a black-box specification, not a measured or certified product result. Power-train loss only (auxiliaries excluded). Same spec: 5 MW at 13.8 kV, 5/10 MW at 34.5 kV; 800 VDC unipolar output, floating or HRG with detection; overload settings recommended at 150% for 150 ms and 120% for 5 s. |
| As of | 2026-06 |
| Source | Open Compute Project, Solid State Transformer (SST) Specification: Medium Voltage to 800 VDC Power Conversion Platform, Revision 0.3.0, effective 22 June 2026 (Google, Microsoft, NVIDIA) · §4.2 MVAC and power rating table; §4.3 LVDC definitions table (efficiency, overload, DC grounding) |
| Review | checking…review by 2027-01-17 · standard cadence |
| Recorded changes | last 2026-10-17 |
| Claim id | ocp-sst-spec-power-train-efficiency-98 |
Where the guide uses it
← Full numbers register — every date-stamped figure in the guide, with revision history.