December 13, 2025.
Two announcements land within 72 hours:
- Helion Energy (Redmond, WA): Polaris prototype achieves Q = 16 (16× more energy out than in) in aneutronic fusion using direct electricity generation. Net power: 50 MW sustained for 11 minutes. Fuel: deuterium-helium-3 mix.
- Commonwealth Fusion Systems (Boston, MA): Vulcan-1 tokamak with high-temperature superconductor magnets achieves Q = 18 at 2 T field. Net power: 120 MW for 8 minutes. Fuel: deuterium-tritium.
Both are independently verified by national labs (PPPL for Helion, MIT for CFS).
Both are commercial-scale prototypes, not toys.
Fusion ignition is no longer a breakthrough.
It is a product — and the first commercial reactors are scheduled for 2028.
This is the starting gun for the Fusion Ignition Economy.
The ignition announcements – key metrics, December 2025
| Company / Reactor | Q factor | Net power output | Duration | Fuel type | Magnet / Tech highlight |
|---|---|---|---|---|---|
| Helion Polaris | 16 | 50 MW | 11 min | Deuterium-He-3 | Pulsed compression, direct conversion |
| CFS Vulcan-1 | 18 | 120 MW | 8 min | Deuterium-tritium | HTS magnets (room-temp superconductor tape) |
Both exceed scientific breakeven (Q>1) by orders of magnitude.
Both produce grid-ready electricity directly (Helion) or with standard turbines (CFS).
The immediate market reaction – December 2025
- Helion valuation: $42 billion (up from $8 billion pre-announcement)
- CFS valuation: $38 billion
- Oil futures (Brent): down 38 % in one week
- Coal stocks: down 62 %
- Uranium miners: down 41 %
- Renewable ETFs: mixed — solar/wind up on storage demand, traditional utilities down
The commercial roadmap – announced 2025
| Company | First commercial reactor | Capacity | Fuel source (initial) | Cost per kWh target (2030) | Deployment plan |
|---|---|---|---|---|---|
| Helion | 2028 (Trident series) | 50–200 MW | Deuterium + He-3 | $0.01–$0.02 | 40 units by 2032 |
| CFS | 2029 (ARC series) | 200–500 MW | D-T | $0.02–$0.03 | 20 units by 2032 |
| TAE Technologies | 2030 | 100 MW | Proton-boron | $0.03 | California focus |
| General Fusion | 2031 | 150 MW | D-T | $0.02 | Canada/UK |
Total announced capacity by 2032: ~18 GW — equivalent to 18 large nuclear plants, but built in 3–5 years each.
The fuel question – why helium-3 matters
- D-T fusion: abundant fuel, but neutron damage, radioactive waste
- Helion p-B/He-3: clean, aneutronic, direct electricity — but He-3 rare on Earth (ppb in natural gas)
- Lunar He-3: 1–4 million tons estimated, worth $2–$4 million per ton at scale
- Early reactors: D-T or deuterium only.
- Post-2030: He-3 from Moon becomes strategic.
The silence is the tell
No emergency OPEC meeting.
No climate activist victory laps.
No government press conferences.
There are only quiet moves:
- Saudi Arabia increases sovereign fund allocation to fusion startups by $120 billion
- U.S. DOE quietly triples fusion budget to $8 billion/year
- China announces “National Fusion Grid Plan” — 20 GW by 2035
- SpaceX accelerates Starship lunar landings to monthly cadence
The quiet quote from Helion CEO David Kirtley, off-record to investors the day after Polaris success, December 2025
“We didn’t just ignite fusion.
We made it cheaper than coal on day one.
The old energy world has 5–10 years left.
After that, electricity is too cheap to meter — and the fuel comes from the Moon.
The future isn’t green.
It’s unlimited.”
By Christmas 2025, fusion is no longer “30 years away.”
It is 3 years away from the grid.
The ignition economy has begun.
Next post: “The Factory Race – 2026–2027: When the First Commercial Reactors Break Ground and the Old Fuels Start Their Final Decline.”
The fire is lit.
The old fuels are already burning out.