Superconducting magnetic storage: What to track
Tape prices, helium supply and any real utility orders
What this tab covers The attributes worth tracking regularly, with the latest value, the direction of travel and why each matters.SMES is pre-commercial for grid storage; track conductor and helium costs and any utility orders rather than performance indicators.
| Category | Attribute | Latest | Trend | Why it matters |
|---|---|---|---|---|
| Techno-economic | LCOS trajectory | No published LCOS; latest grid cost data from 1999 (USD 4 million for 6 units, historical)4 | → stable | Without a credible cost series there is no investable case. |
| Techno-economic | Coil and cryocooler health | Design life about 30 years (review figure); no cycle limit from chemistry2 | → stable | Quench events and refrigerator uptime replace capacity fade as the health indicators. |
| Supply chain | Critical material cost and concentration (helium) | About USD 12/m3 base price (2025); production led by US and Qatar5 | ↕ volatile | Low-temperature SMES depends on helium, which competes with MRI and semiconductors. |
| Supply chain | HTS tape cost | USD 150 to 200/kA-m volume price (2023); about USD 20/m quoted for PLD tape (2025)78 | ↗ improving | Fusion magnet demand is scaling output; USD 50/kA-m is seen as the tipping point for power uses, and conductor is the largest cost lever for SMES. |
| Market | Ancillary service market saturation | Ancillary services under 5% of US wholesale market value6 | ↘ worsening | Batteries and supercapacitors already crowd these small markets. |
| Regulatory | Safety and environmental compliance | No SMES-specific grid storage standard identified1 | → stable | Quench protection and stray-field limits would need site-specific approval. |
| Environmental | Lifecycle carbon payback period | No published figure found1 | → stable | Continuous refrigeration load should be counted in any lifecycle assessment. |
| Technology | Largest demonstrated HTS SMES | 2.5 MJ built (KERI, Korea, 2011); 45 MJ pulsed-power design study (2023)19 | → stable | Scale-up beyond the MJ class is the milestone to watch. |
Sources
- SMES (Superconducting Magnetic Energy Storage): present status and future (P. Tixador, Grenoble INP / CNRS) (historical, 2011) Energy Research Forum (ERF), conference presentation, Lund, 2011
- Review of applications of superconducting magnetic energy storage (SMES) to power systems (M. Fadly, MPhil thesis; secondary source) University of Strathclyde, 2021
- D-SMES for Wisconsin (historical trade article, 1999) Modern Power Systems, 1999
- Mineral Commodity Summaries 2026: Helium US Geological Survey, 2026
- Pathways to Commercial Liftoff: Virtual Power Plants US Department of Energy, 2023
- Commercial compact fusion triggered REBCO tape industry: pulsed laser deposition technology opportunities and challenges (Zhao et al.) Superconductivity (Elsevier), vol. 15, art. 100188, 2025
- The prospects of high-temperature superconductors (Molodyk and Larbalestier), Science vol. 380, pp. 1220-1222 Science (AAAS), 2023
- Superconducting magnetic energy storage for pulsed power magnet applications (Bhardwaj et al.), IEEE Transactions on Applied Superconductivity vol. 33 no. 5, 5700306 IEEE / National High Magnetic Field Laboratory, 2023