utility-to-VRM efficiency of the stated four-stage AC fixture versus the separately sourced SST/800 VDC architecture result
About 80–87% AC case (82% representative)derived
| Value kind | derived — Derived values are guide calculations; their result is only as fixed as the stated inputs, scope, and method. |
|---|---|
| Scope | The AC range multiplies .99×(.94–.97)×.96×(.90–.94); the representative chain is .99×.94×.96×.92. The arithmetic keeps full precision, and the displayed figure follows the assumed inputs. Routing and auxiliaries are excluded, and the range is neither a surveyed fleet range nor an analyst's DC measurement. The 86.7% top of the four-stage range happens to match the ~87% SST/800 VDC result that SemiAnalysis modeled in May 2026. The two describe different chains and rest on different kinds of evidence, so the match does not make them a tie. |
| As of | 2026-09-08 |
| Source | Guide derivation, September 8, 2026; Chapter 4.1 assumed four-package AC ledger. |
| Derivation | Low=.8040384; high=.86660352; representative=.82190592; report about 80–87% and 82%. The separate modeled DC record has its own evidence boundary. |
| Review | checking…review by 2027-04-17 · standard cadence |
| Recorded changes | last 2026-09-16 · 3 revisions tracked |
| Claim id | utility-to-vrm-efficiency-legacy-ac-span |
Where the guide uses it
← Full numbers register — every date-stamped figure in the guide, with revision history.