NVIDIA's 800V HVDC architecture is redesigning the data center BOM. The reduction in AC-DC conversion stages simultaneously bottlenecks solid-state transformers, precision power supplies, high-voltage switchgear, and liquid cooling. We discover 5 'Own the Bottleneck' candidates among US-listed small and mid-cap stocks with market caps of $3B–$15B.
FACTNVIDIA announced the 800V HVDC architecture in 2025. It eliminates multi-stage AC-DC-AC conversion losses by directly converting 10–20kV AC to 800V DC at the data center edge using solid-state transformers. (Source: Sahm Capital, 2026-01-15) This means a structural change in the data center BOM where the proportion of AC switchboards, UPS, and rack PSUs decreases, while the proportion of MV switchgear, precision converters, DC busbars, and liquid cooling increases.
FACTThe HVDC transmission market is growing from $12.74B in 2025 → $13.99B in 2026 (+9.8% YoY) to $20.76B in 2030. (Source: GlobeNewswire / Mordor Intelligence, 2026-01-27) The US exceeds the global average with a CAGR of 10.62% during the same period. (Source: Mordor Intelligence, 2026)
INFERENCEThere are two key bottlenecks. (1) Manufacturing Capacity — Hitachi Energy, Siemens Energy, and GE Vernova occupy 80%+ of the global HVDC converter valve market, strengthening pricing power in the absence of new entrants. (2) Liquid Cooling Certification — With a liquid cooling penetration rate of < 10%, the mandatory adoption rate increases with each GPU generation, and the limited pool of verified OEMs maintains high unit prices. (Source: 24/7 Wall St, 2026-01-16)
INFERENCEWeighted Sum +79 / +100 → OW (Overweight). However, due to momentum channel overheating, a "split + buy on pullback" strategy is reasonable for new entries.
| Stock (Ticker) | BOM Position | Close 5/2 | 1D % | Estimated Market Cap | FY26 Guidance / Backlog | Rating |
|---|---|---|---|---|---|---|
| Powell Industries (POWL) | MV/HVDC Switchgear · Substation Package | $275.33 | -0.70% | $3.3B | $1.6B record backlog · First $75M+ order for DC megaproject | |
| Modine Mfg (MOD) | Data Center Liquid Cooling (Airedale CDU·Chiller) | $266.83 | +4.79% | $13.9B | FY26 Revenue +20–25% · Adj EBITDA $455–475M · DC 78% YoY | |
| Advanced Energy (AEIS) | 800V/HV Precision Power · DC Converter Module | $389.05 | +1.34% | $14.0B | 2026 DC Revenue +30%+ · DC Computing 2025 +107% | |
| SPX Technologies (SPXC) | Cooling Tower · Transformer · Heat Exchanger | $208.13 | -4.92% | $9.8B | 2026 DC Revenue +50% Guidance · Q1 Tariff Noise | |
| nVent Electric (NVT) | Direct-to-Chip Liquid Cooling · Cabinet · Busbar | $158.92 | +11.21% | $26.1B* | DC Exposure ~30% · Deepening NVIDIA Partnership (Barclays Top Pick) |
* NVT is at the upper end of mid-cap (cutoff based on mid-cap criteria). Borderline when defining market cap as under $25B.
Source: KIS MCP `inquery_overseas_stock_price` (Queried 2026-05-03 KST, based on last trading day 2026-05-02) · Guidance: Each company's IR conference call (Quoted from Yahoo Finance / Seeking Alpha)