The Sail Wind Turbine
A patent-pending VAWT designed to start generating in winds of just 0.5 m/s — where standard turbines do nothing. Built for Europe's Global Stilling: winds are getting weaker, and the turbines of the future must work with less.
Four reasons this turbine changes the economics
Europe's "Global Stilling" trend means less wind everywhere. A turbine that starts at 0.5 m/s keeps generating where others stall.
Winter is when solar collapses and wind peaks. Better wind capture directly strengthens the 100% off-grid promise.
Replaces today's most expensive station component — the ~$5,000 off-the-shelf turbine — with our own IP at a lower target cost.
A granted patent would give the carport a defensible edge competitors can't copy — on top of trade-secret EMS logic.
Full transparency, zero hype
Investors will scrutinise these numbers — so we label them the way they deserve.
| Type | Vertical-axis (VAWT), H-Darrieus type with adaptive sail mechanism |
|---|---|
| Patent status | DPMA 10 2026 105 834.5, filed 12 Feb 2026Pending |
| PCT step | Planned — budgeted in the Stage-2 programme |
| Cut-in wind speed | 0.5 m/sDesign target |
| Survival wind speed | 40 m/sDesign target |
| Low-wind efficiency | >2× standard in low, turbulent windDesign target |
| Rated power | 1 kW — match and replace the current turbine |
| Cost at scale | < $5,000 — beat the current component cost |
What exists today: a filed patent application and a technical concept. The turbine has not been built or tested — not even a single prototype.
What this funding creates: a structured R&D programme — CFD simulation, wind-tunnel work and field testing at our pilot site — that turns the claims above into measured results.
Important: the current sellable carport does not depend on this turbine. It runs on proven off-the-shelf components. Stage 2 is upside, not a prerequisite.
What the prototype actually costs
A dedicated R&D budget, separate from the carport round. Every line is an engineering estimate — refined with quotes as the programme starts.
The carport round (€300k) builds the first functional MVP with proven components. Stage 2 is deep-tech R&D with a different risk profile and a different reward: proprietary hardware, a patent moat and a cheaper, stronger winter generator for every future unit.
We are evaluating running the R&D under an Israeli subsidiary to leverage Israel Innovation Authority support and the local engineering ecosystem.
All performance figures are targets to be proven through this programme. Budget lines are estimates — replaced by engineering quotes before commitments.
From filing to field-proven in 12–18 months
Simulate, iterate and freeze the design.
3–4 build iterations with bench testing.
Validate cut-in and yield at the pilot site.
Extend protection beyond the PCT step.
CE certification; into the carport BOM.
Two ways to back UnpluxEra
Fund the Stage-2 prototype as a dedicated R&D ticket — or invest in the carport pre-seed round. Separate tracks, one mission.
