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TDL Manufacturing / Minnesota, USA

American-made wind, engineered in Minnesota.

Small wind turbines for homes, farms, and tribal nations. Designed to IEC 61400-2, FEA-validated for 20+ year fatigue life, and built in the United States.

Talk to us about a turbine See the product line
Rated power
10 / 20 / 40 kW
Design life
20+ years
Standard
IEC 61400-2
Origin
USA

  • Designed to IEC 61400-2

    International small wind turbine safety standard

  • ICC-SWCC certification

    In progress — unlocks 30% federal tax credit

  • UL 6142 electrical listing

    Planned — complementary to SWCC

  • Made in Minnesota, USA

    Designed and manufactured in the United States

The product line

Three turbines. One engineered platform.

Complete wind turbine kits — turbine, blades, tower, and controller. Horizontal-axis, IEC 61400-2 Class III and IV, engineered for Midwest and reservation wind conditions. A 100 kW model is in development for Year 3.

Model

TDL 10

10 kW

Residential energy independence and small farms.

Rated power
10 kW
Cut-in
3–5 m/s
Grid modes
Grid-tie / off-grid
Request pricing

Model

TDL 20

20 kW

Larger homesteads, agricultural operations, and small commercial sites.

Rated power
20 kW
Cut-in
3–5 m/s
Grid modes
Grid-tie / off-grid
Request pricing

Model

TDL 40

40 kW

Light industrial, tribal community power, and off-grid operations.

Rated power
40 kW
Cut-in
3–5 m/s
Grid modes
Grid-tie / off-grid
Request pricing

Preliminary. TDL is pre-production. Any kit pricing shared is preliminary and subject to change. For current kit details and availability, request a quote directly.

Why TDL

Trust, built on specs — not slogans.

Four reasons TDL stands up to technical review from certification bodies, institutional investors, rural homeowners, and tribal energy offices — without a different pitch for each one.

01

U.S.-made, not imported

Most small wind options on the U.S. market are Chinese or European imports with inconsistent support and no certification alignment. TDL is designed and manufactured in the United States, in partnership with a qualified American electric motor manufacturer.

02

Engineered by a team with wind industry roots

Two of our four founders previously founded Small Wind Turbines, where the 10, 20, and 40 kW prototypes were built and field-tested. Real drawings. Real data. Roughly $2.3M of technology investment already committed before TDL stepped forward.

03

Certification-first, not marketing-first

Designed to IEC 61400-2. FEA-validated for static, modal, fatigue, and buckling load cases. On the ICC-SWCC certification path from day one — the same path that unlocks the 30% federal tax credit and simplifies permitting.

04

Built for American energy independence

Tribal nations, rural homesteads, and farms have been overlooked by utility-scale wind. We size turbines for community and on-site power (10–40 kW today, 100 kW coming), engineer for cold-climate sites, and treat tribal energy offices as the serious buyers they are.

The technology

Engineered and FEA-validated for American conditions.

Three pieces of discipline hold the product together: an international standard, a modern structural analysis stack, and a third-party certification path. Here's what each one means in plain English.

Request the engineering package

A dedicated Technology page is in development.

IEC 61400-2

The international safety standard for small wind

IEC 61400-2 is the international standard that governs how small wind turbines are designed for structural safety, fatigue, and load. Every TDL turbine is engineered to this standard from the ground up — the same standard used for SWCC certification.

FEA

Finite element analysis — proving the math before the steel

Every major structural component is validated through finite element analysis: static strength, modal response, 20-year fatigue life, and buckling. We tie those analyses to IEC 61400-2 load cases — Cases A through J, plus aeroelastic DLCs — so the simulations match the standard.

ICC-SWCC

Third-party certification, not self-attestation

The Small Wind Certification Council is the leading third-party certification body for small wind in the U.S. SWCC certification unlocks the 30% federal tax credit, streamlines local permitting, and separates certified American turbines from uncertified imports.

Who it's for

Power where the grid falls short.

The U.S. distributed wind market has passed 1,100 MW installed. The product category isn't experimental — it's just been waiting for a credible, certified, American-made option. TDL is built for four audiences, and each one sees the same serious engineering.

Residential

Homeowners pursuing energy independence

Rural and semi-rural sites with good wind exposure. A TDL 10 can meaningfully offset an annual electric bill, and qualifying installations are eligible for the 30% federal Residential Clean Energy Tax Credit.

Farms & agricultural

Operations with acreage and wind to work with

Dairies, grain operations, and homesteads that already manage their own infrastructure. TDL 20 and TDL 40 fit farm-scale loads and can pair with battery storage for resilience during outages.

Tribal nations

Native American energy offices and sovereign-led projects

Many tribal nations have abundant wind, expensive diesel dependence, and a direct sovereign interest in controlling their own power. TDL sizes turbines for community-scale generation and engineers for cold-climate sites. This is a core pillar — not a side market.

Light industrial

On-site generation for small commercial sites

Workshops, food producers, remote facilities. A TDL 40 can cover a meaningful share of an on-site commercial load, and the commercial Investment Tax Credit applies to qualifying installations.

Leadership

Engineers and operators who have built this product before.

Two of the four founders previously founded Small Wind Turbines — the company behind the prototypes TDL is productizing. The team is heavy on engineering and wind industry experience, not marketing.

  • Joel Trandahl

    President & CEO, Founder

    Engineering-trained founder leading TDL’s product, manufacturing partnership, and go-to-market strategy.

  • Ken Drewlo

    Engineering Director, Founder

    Engineering-trained co-founder responsible for turbine, blade, and structural design discipline.

  • David Winkelman

    Renewable energy sales & business advisor

    Founder of Small Wind Turbines (SWT). Brings the go-to-market relationships and sales experience behind the original prototypes.

  • Doug Wogstad

    Technology advisor

    Co-founder of Small Wind Turbines (SWT) and engineering advisor. Helped lead the original 10, 20, and 40 kW prototype programs.

Leadership photography in production. Monogram placeholders shown in the meantime.

Powering America's future

Deliver affordable, American-made wind energy solutions that power homes, businesses, and tribal communities while creating Minnesota jobs.

Let's power the future together.

Talk to us Meet the team
Contact

Three ways to reach us.

Pick the path that fits your project. Each one goes to the team directly — no call center, no generic form. We pick up the phone.

Talk to us about a turbine

Homeowner, farmer, or on-site commercial — we’ll walk through sizing, siting, and what the 30% federal tax credit means for your project.

Start a conversation

Partner or distribute

Installers, distributors, and tribal energy offices — reach out to discuss partnership terms, pilot projects, and regional distribution.

Explore partnership

Investor inquiries

Accredited investors and institutional partners — request our investor package and scheduling for a direct conversation with the founding team.

Request investor materials