World's Only Active-Pitch VAWT

WindSurf™

Patented active-pitch technology that continuously adjusts every blade in real time — delivering clean power where conventional turbines fail. Storm-proven. IEC certified. Market ready.

Investment Opportunity Explore Technology

>40%Power Efficiency

6.4kWRated Output

116mphStorm Proven

£280MSOM (Sale)

6.4 kWRated output

Active PitchBlade control

4.4mRotor diameter

116 mphStorm proven

IEC 64100-2 CLASS III CERTIFIED

The Problem

A £multi-billion market running on dirty energy

1.5M+ Telecom towers globally off-grid or on bad-grid

Their only reliable power source today is a polluting diesel generator.

20k+ UK Rail track miles needing off-grid power

Level crossings, signalling, comms — all running on diesel.

25k+ UK schools and hospitals requiring green energy

PSDS Phase 4 funding live. Demand is there. Technology was not.

Fuel Logistics & Theft

Remote sites require constant re-fuelling. Fuel theft is endemic in developing markets, driving costs far beyond estimates. The diesel supply chain is fragile, expensive, and environmentally damaging.

High Maintenance OPEX

Diesel generators require frequent servicing. For tower operators, energy costs represent a major and growing share of total OPEX — typically the single largest line item at off-grid sites.

Regulatory & ESG Pressure

Operators face tightening carbon mandates. Net-zero commitments require credible solutions — and diesel is not one of them. BT, Vodafone and Network Rail all have 2040 carbon-neutral targets.

Conventional Wind Turbines Don't Fit

HAWTs need smooth, unidirectional airflow, clearance of 15–30m, and ground conditions incompatible with telecom compounds and rail corridors. Existing VAWTs are inefficient or dangerous.

The Solution

The world's only active-pitch vertical axis wind turbine

Unlike every other VAWT, WindSurf™ continuously and independently adjusts the pitch angle of each aerofoil blade in real time — like an expert sailor trimming a sail — extracting maximum power from every shift in wind speed and direction. This is the fundamental breakthrough that no competitor has yet commercialised.

Real-World Test Results — WS133 Demonstrator

Aerodynamic efficiency (Cp) vs TSR — CFD predictions vs real-world recorded data. Real-world results tracking predicted performance.

Data point plot: Aerodynamic efficiency % (Cp) vs wind speed, coloured by Tip Speed Ratio (TSR). Consistent 40–65% efficiency band achieved.

Why Active-Pitch Wins

Fixed-pitch VAWTs stall in variable wind. Active-pitch continuously optimises the angle of attack on every blade — delivering >40% efficiency vs 12–40% for all competitors. CFD-validated and confirmed by WS133 real-world test data.

Works Where Others Cannot

Turbulent sites, rooftops, rail trackside, telecom compounds — locations where HAWTs and fixed-pitch VAWTs simply cannot operate. The WindSurf™ excels precisely where the market need is greatest.

Inherent Fail-Safe

Cannot spin without the control system active. Power loss = safe stop. Storm Éowyn (January 2025): 100mph+ gusts at the test site — the WS133 demonstrator survived undamaged, blades simply flagging in the wind.

Near-Silent Operation

No gearbox. Brushless direct-drive generator. Zero-cogging design. Low rotation speed. Suitable for urban, rail-side and compound installations where noise is an absolute deal-breaker for conventional turbines.

Modular & Scalable

No concrete bases. Assembled on-site 'Lego style' without specialist crews. Core physics scale from the 6.4kW WS213 urban unit to multi-megawatt offshore platforms. Same IP covers tidal flow applications.

8 Years of R&D Behind It

Originally developed by Swift TG Energy. £2.8M+ prior investment. IEC 64100-2 Class III certified. Patent co-authored with Swift Technology Group. The WS133 16.5kW demonstrator has confirmed all CFD predictions.

The Product

WS213 — Production Model Specification

The WS213 is the flagship 6.4kW commercial unit, purpose-engineered for infrastructure-adjacent deployment. Asset-light manufacturing: sub-assemblies purchased pre-built, assembled on-site.

Architecture	Active-pitch vertical axis turbine
Rated Power	6.4 kW @ 12 m/s
IEC Class	IEC 64100-2 Class III
Cut-in Wind Speed	3 m/s (6.7 mph)
Rated Wind Speed	12 m/s (26.8 mph)
Survival Wind Speed	52 m/s (116.3 mph)
Rotor Diameter	4.4 m
Blade Length	3.0 m
Swept Area	13.2 m²
Generator	Brushless, zero-cogging, direct-drive axial flux PM
Gearbox	None
Design Longevity	20 years
Bearing Life	>100 years (sealed)
Maintenance	Monthly visual + 5-year brush change
Monitoring	Real-time remote algorithmic control

IEC 64100-2 Class III Certified · Asset-light manufacturing

WS213 vs The Competition

Physical Size Comparison

WS213: 13.2m² swept area — smallest footprint with highest rated output per m² of sweep.

Efficiency Across Wind Speeds

WindSurf™ maintains >40% efficiency across all wind speeds (green band). Competitors peak then fall away.

Technology Advantages

Active-Pitch Control

Real-time blade adjustment maximises power from every wind shift

Fail-Safe Design

Blades feather automatically — cannot overspeed under any condition

Storm Proven

Survived 100 mph+ gusts, Storm Éowyn, January 2025

Silent Operation

Zero-cogging, direct-drive — ideal near homes and communities

Turbulence Tolerant

Excels in variable wind where all HAWT designs fail

Fully Recyclable

100% aluminium blades — no composite end-of-life waste

Modular Build

No concrete base, no gearbox, no specialist installation skills

20-Year Life

Sealed bearings rated >100 years. Monthly visual only.

Market Opportunity

WS213 WindSurf™ deployed at a telecoms tower site alongside solar and battery storage

A £280M Serviceable Obtainable Market

Four distinct, large-scale market verticals. Each represents a standalone commercial opportunity. Together they constitute a multi-billion-pound addressable market that no existing wind turbine product can serve.

TAM

£67.5bn / £4.5bn ARR
Telecom Towers

1.5M world-wide off- or bad-grid towers
<50,000 currently wind-powered (<1%)
3,725 units in SOM target

SAM

£5bn / £334M ARR
Rail + Schools + Hospitals

6,000+ level crossings along 20k+ UK track miles
24,000+ schools and 1,200+ NHS hospitals
PSDS Phase 4: £1.425bn active fund

SOM

£280M (sale)
or £19M ARR
Initial target

6,225 total units across 3 verticals
3% – 10% market penetration targets
Conservative base case from model

Outright sale: £45,000 per unit

Lease: £500/month (£6,000/yr)

Carbon credits: ~€900–1,134/unit/yr

Customer payback vs diesel: 2.6–4.8 years

Traction & Pipeline

Active Discussions with Market Leaders

Across telecoms, rail, public sector and international markets — Roth has established a pipeline of engagements with the operators and partners who matter most.

Telecoms

BT Group / EE

Firm Discussions

Shropshire Hills pilot validates use case. 5,000 suitable UK sites identified. Paul McCullagh's direct relationships with BT infrastructure team.

Cellnex

Detailed Discussions

Pan-European tower operator. 82,000+ sites. Significant international scale potential across Southern Europe and UK.

Cornerstone (Vodafone)

Active Engagement

Sub-Saharan deployment interest. Active engagement with Vodafone infrastructure team.

Rail & Public Sector

Network Rail

Feasibility Test Site

Government decarbonisation mandate. 800+ viable UK trackside sites. Feasibility test site being established for H2 2026.

LAT Water Treatment

MoU Signed

Turbines to power HDH water purification technology. Recurring supply agreement in place.

UUMTS

In Discussions

100 units/year for modular tower systems with no grid access.

International

Barbados Invest

Trial Unit Agreed

Facility visit February 2026. 156-unit model at 1MW capacity developed with University of the West Indies.

Carbon Zero Solar PTY

LOI Signed

Option for 50 units plus manufacturing and distribution rights across Africa. LOI executed.

Return on Investment — Customer Perspective

Payback period in years vs average wind speed. Against diesel: 2–4 years. Against grid: 7–17 years.

Total return over 20-year lifespan. Against diesel offset: up to £850,000. WS213 cost shown as dashed gold line.

Strategic Partnerships

Swift Technology Group

30% shareholder and co-author of the WindSurf™ patent. Aerospace-grade manufacturing at Norwich factory. ISO 9001:2015 certified. MoD Project MONET contractor.

Amber Fusion

LAT Water Treatment

MoU signed. Turbines to power HDH water purification technology. Recurring supply agreement in place.

Financials

Summary Forecast 2026–2032

Corrected model: lease rate £500/month, installation COGS on sold units only, 55/45 sale/lease mix. Excel model available on request.

£10.3MRevenue 2027
First commercial year

EBITDA+Profitable from 2027
Per corrected model

£102.9MRevenue 2030
Growing to £260.7M by 2032

>£50MTarget EV 2030
Based on ~£28M EBITDA

Revenue & EBITDA Forecast (£M)

2026

2027

2028

2029

2030

2031

2032

Revenue (£M)

EBITDA (£M)

Units Deployed Per Year (AI-extracted from financial model)

52026

3892027

8252028

1,5852029

3,2552030

5,2502031

7,6612032

The Team

Experienced Across Technology, Commercial & Finance

David Morgan BEng

Chief Executive Officer

Serial entrepreneur and engineer. Developer of autonomous coal washing plants in Australia and Pittsburgh USA. Founder of Marine Oil recycling in Freeport, Bahamas. Leads RTL strategy and engineering vision.

Swift Aircraft

Engineering Design Partner — 30% Shareholder

The engineering and manufacturing arm of Swift Technology Group, based at Scottow Enterprise Park, Norwich — the 600-acre former RAF Coltishall site where Roth's first production units are built. First new UK aircraft manufacturer in 25 years. ISO 9001 certified for aerospace, aviation, oil & gas and renewables. Active MoD contract under Project MONET with GKN Aerospace. Co-authors of the WindSurf™ patent. 30% shareholding aligns incentives: every turbine sold increases Swift's equity value.

Alan Penman MRICS

Sales & Marketing

Chartered Surveyor since 1989. 20+ years in mobile telecoms site identification and planning. Scottish RICS Board 2008–18. Renewables across wind, solar, battery and EV charging. Founder, Decarbonisation Network.

Paul McCullagh MRICS MCMI

Telecoms Strategy — Siarcomms

Former Commercial Services Director and London Programme Director at Cornerstone. National Acquisition Manager at O2 UK. Head of Telecoms & Utilities at Gateley Hamer. Direct relationships with BT, EE, Vodafone and Cellnex.

Metro Assets Ltd

Corporate Finance Advisor

Corporate finance and asset management specialists. Advising Roth Turbines on the current EIS raise and strategic growth planning.

Technology

Algorithmic Active-Pitch Control System

The WS213 is governed by a proprietary real-time control system that independently manages each of the five aerofoil blades — synchronising pitch, monitoring wind sensor data, and optimising TSR continuously.

Roth Turbines active pitch control system interface

Active pitch control interface — showing independent blade axis control (AERO1–5), generator status, real-time wind speed sensor data (instantaneous, average, adjusted), and power output monitoring. Target TSR: 1.9. Generator voltage: 620V.

Investment Opportunity

Join us at the start of a high-growth journey

Pre-Money Valuation (Fully Diluted)	£10MImplies 25,000,000 existing shares at 40p
Share Price (Offer Price)	40pPer new ordinary share
Amount Sought	£2MEIS-qualifying share subscription
Post-Money Valuation	£12MFully diluted at full subscription
% of Enlarged Capital	16.7%5,000,000 new shares out of 30,000,000 total
Target Close	31 July 2026Applications by 24 July 2026
Target EV 2030	>£50MBased on ~£28M EBITDA 2030

EIS

30% income tax relief for UK investors
HMRC approved — significant tax benefit

Application of Funds

Evaluation unit manufacture & assembly (5× WS213)£250,000

Trial deployments (Network Rail, BT/EE, Cellnex, Barbados, Africa)£150,000

Supply chain & component purchasing (production ramp)£900,000

Working capital, sales & marketing, professional fees£450,000

Contingency (10%)£250,000

TOTAL£2,000,000

Why Invest Now

Patented technology — no direct technical competitor exists today at commercial scale

Demonstrator built, tested and storm-proven — WS133 real-world data confirms CFD predictions

Active pipeline: BT, Network Rail, Cellnex, Barbados, Africa — multiple verticals progressing simultaneously

EIS approved — 30% income tax relief for qualifying UK investors

Revenue break-even 2027; >£50M Enterprise Value target by 2030

8+ years of R&D and £2.8M+ prior investment already in the product

Engineering partner Swift Aircraft holds 30% equity — strong alignment of interests

Debt-free company with IP independently valued above current pre-money valuation

Request Information Memorandum

Get in touch

For investor enquiries, the full Information Memorandum, or to arrange a demonstration of the WS213 WindSurf™, please contact us directly at enquiries@rothturbines.co.uk or call +44 7858 090063.

enquiries@rothturbines.co.uk

Telephone

+44 7858 090063

Company Number

13815798

Registered Address

Edinburgh EH5 1PN

Head Office

Harrogate HG1 2HR

Manufacturing & Engineering

Swift Aircraft, Hangar 2
Scottow Enterprise Park
Lamas Road, Badersfield
Norwich NR10 5FB