What WindGuard Certification GmbH does

WindGuard Certification GmbH is a Varel, Germany-based accredited certification body and testing laboratory that serves the wind energy industry. Founded in 2011 as part of the WindGuard Group, the firm issues type certifications, project certifications, electrical certifications, conformity declarations, and continued-operation assessments for onshore and offshore wind turbines, wind farms, solar parks, storage systems, and biogas installations. It operates a DAkkS-accredited test laboratory under DIN EN ISO/IEC 17025, is accredited as a certification body under 17065 and an inspection body under 17020, is accepted by IECRE for type certification, and is recognized by Germany's BSH as an authorized testing agent for offshore wind projects.

The company's core technology centers on the design and in-house construction of mobile Fault-Ride-Through (FRT) measurement containers, ranging from 1,000V low-voltage units up to 36kV and 27-MVA capacity, with country-specific variants built for European, US, and Korean grids. This proprietary test equipment enables on-site measurement of grid connection properties for wind turbines and other generation units and supports the firm's recurring revenue from FRT testing campaigns. The cumulative certified generation capacity exceeds 4.45 GW across wind, solar, storage, and other renewables.

Revenue is generated through project-based professional services — certification, inspection, and testing engagements priced on custom quotes — combined with hardware sales or leases of the firm's FRT containers. The go-to-market is enterprise field sales targeting wind turbine manufacturers (e.g., Siemens Gamesa, Enercon, Adani, Windwise), wind farm operators and developers (e.g., Global Tech I, Stadtwerke München), and component suppliers, supported by referral networks and active participation in national and international technical committees. Marketing relies on industry events, standards bodies, and the company website rather than broad digital campaigns. The firm is privately held under Managing Director Lars Weigel with no disclosed external funding.

Name

WindGuard Certification GmbH

Legal name

WindGuard Certification GmbH

Website

https://windguard-certification.de

Company type

Private

Founded year

2011

Operating status

Operating

Headcount range

11–50 employees

Short description

WindGuard Certification GmbH is a Varel, Germany-based DAkkS-accredited certification body and testing laboratory providing type, project, electrical, and continued-operation certification for wind turbines, wind farms, solar parks, storage systems, and biogas plants, serving OEMs, developers, and operators.

Ownership category

akta.pro rank

Product category

Wind Energy Certification Services

NAICS

Testing Laboratories and Services (541380), Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals (334515)

SIC

Services-Testing Laboratories (8734), Instruments For Meas & Testing Of Electricity & Elec Signals (3825)

akta.pro primary industry

Third-Party Certification, Code Compliance & Regulatory Inspection (ASME/API/ISO) (EUAEAHAN)

Keywords

• Wind energy certification
• Type certification services
• Grid connection testing
• Fault ride through testing
• Wind turbine inspection

Headquarters

HQ city

Varel

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Infrastructure, Marketing or Sales

Revenue model

1. Certification Services: WindGuard Certification generates revenue through providing type certification, project certification, and electrical certification services to wind turbine manufacturers, wind farm operators, project developers, and component suppliers. Services are project-based and comply with international standards including IEC 61400-22, FGW TR3/TR4/TR8, BSH, and IECRE OD-501/502.
2. Testing Laboratory Services: Accredited testing laboratory providing measurements of electrical properties for decentralized generation units and plants, including Fault-Ride-Through testing for grid stability certification.
3. Test Equipment Manufacturing (Prüfgerätebau): Design and construction of custom electrical test equipment (FRT containers) sold or leased to customers for their own testing campaigns. Examples include FRT containers for European, US, and Korean grids.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

WindGuard Certification is an accredited certification body and testing laboratory that provides electrical, type, and project certification services for wind turbines and renewable energy generation units. The company issues conformity declarations, conducts Fault-Ride-Through (FRT) measurements using proprietary mobile test containers, and certifies continued operation of aging wind farms under international standards including IEC 61400-22, IECRE OD-501/502, FGW TR3/TR4/TR8, and BSH 7005.

Product overview

WindGuard Certification GmbH operates as a unified certification services company offering an integrated portfolio of testing and certification solutions for the wind energy industry. The core services encompass Electrical Certification (Elektrische Zertifizierung), Type Certification (Typenzertifizierung), Project Certification (Projektzertifizierung), a DAkkS-accredited Testing Laboratory (Prüflabor), Test Equipment Construction (Prüfgerätebau), and Continued Operation certification (Weiterbetrieb). These services are designed to work together as a comprehensive certification ecosystem—clients can access type certification of wind turbines alongside electrical property testing using the company's own FRT container equipment, supported by project-specific assessments and lifetime extension services.

Differentiator

Problem solved

Functional benefit

Products and services

• Electrical Certification (Elektrische Zertifizierung) Certification of electrical properties of generating units (EZE) and generating plants (EZA), including grid connection characteristics and conformity declarations under FGW TR3, TR4, and TR8 standards. Services are targeted at wind turbine manufacturers, wind/solar/storage/biogas plant operators, and project developers who need legally recognized electrical certificates for grid connection.
• Type Certification (Typenzertifizierung) Type and component certification of wind turbines according to DIBt, EN/ISO 61400-22, and IECRE OD-501 standards, including prototype certification for onshore and offshore wind energy systems. Provides legally recognized type certificates required by manufacturers to bring new turbine designs to market.
• Project Certification (Projektzertifizierung) Project certification for onshore and offshore wind farms under BSH, EN/ISO 61400-22, and IECRE OD-502 standards, including Site Specific Design Assessment (SSDA) and periodic inspections. Supports developers and operators in obtaining project approval and ongoing regulatory compliance.
• Testing Laboratory (Prüflabor) DAkkS-accredited testing laboratory performing measurements of electrical properties of decentralized generation units and generation plants, including Fault-Ride-Through (FRT) tests to prove grid stabilization of wind turbines. Provides legally recognized test reports that feed into electrical and type certification.
• Test Equipment Construction (Prüfgerätebau) Custom design and construction of electrical testing equipment, including mobile and containerized Fault-Ride-Through (FRT) testing systems for various voltage levels (1,000V to 36kV) and up to 27-MVA capacity. Built for European, US, and Korean grid requirements and sold or leased to customers running their own testing campaigns.
• Continued Operation Certification (Weiterbetrieb) Certification services for the continued operation of wind turbines after the expiration of their design lifetime, including inspections and structural integrity assessments to extend operational lifespan. Targeted at operators of aging wind farms in Germany that need regulatory approval to keep operating.
• Other Services (Weitere Dienstleistungen) Additional certification, service, and testing offerings including shop approvals for rotor blade repairs, safety distance tools, ice fall software certification, and database evaluations. Targeted at wind turbine manufacturers and operators needing supplementary technical assessments beyond the core certification portfolio.

Quantifiable outcome

• Over 4.45 GW of total certified generation capacity across all certified generation units
• +3 more outcomes

Named customers6 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature2 records

Partnerships

Six partnerships are on record, tiered core.

• Deutsche Akkreditierungsstelle GmbH (DAkkS)coreTechnology or IntegrationWindGuard Certification holds accreditation from DAkkS as both a certification body (DIN EN ISO/IEC 17065) and testing laboratory (DIN EN ISO/IEC 17025) and inspection body (DIN EN ISO/IEC 17020). This accreditation is the foundational regulatory requirement enabling the company to issue legally recognized certificates and test reports for wind energy systems.
• Bundesamt für Seeschifffahrt und Hydrographie (BSH)coreTechnology or IntegrationSince 2010, WindGuard Certification has been recognized by BSH as Prüfbeauftragter (authorized testing agent) for all trades and project phases in German offshore waters under BSH Standard 7005:2015. The company operates with both EN/ISO 17065 (certification body) and EN/ISO 17020 (inspection body) designations for BSH projects.
• IECRE (International Electrotechnical Commission for Renewable Energy)coreTechnology or IntegrationWindGuard Certification is accepted by IECRE for type certification of wind turbines according to IECRE OD-501 ('Type and Component Certification Scheme – Wind Turbines'), covering prototype, type, and component certification. The company participates in IECRE working groups WG501, SG550 (Certification Bodies), and SG551 (Test Laboratories).
• BWE – Bundesverband WindEnergie e.V.coreTechnology or IntegrationWindGuard specialists participate in the BWE expert advisory board (Sachverständigenbeirat), the Continued Operation working group (AK Weiterbetrieb), and the Grid working group (AK Netze).
• FGW – Fördergesellschaft WindenergiecoreTechnology or IntegrationWindGuard specialists participate in multiple FGW technical committees including the Fachausschuss elektrischer Eigenschaften (FAEE — the overseeing body for FGW TR3, TR4, TR8), the working groups for FGW TR3 (measurement), TR4 (modeling), TR7 (proof testing), and TR8 (certification), as well as meetings of certification bodies and measurement institutes.
• DKE/K-383 / IEC 61400coreTechnology or IntegrationWindGuard specialists participate in DKE/K-383 and IEC TC88 working groups responsible for wind turbine design standards (IEC 61400 series), contributing to standard development at the international level.

Scale indicators8 records

Recent moves14 records

Expansion highlights5 records

Broad incumbents

• Bureau Veritas: Global TIC firm with a wind energy practice covering type certification, project certification, and offshore verification services. Comparable as a broad incumbent offering IECRE-accepted certification across multiple geographies.
• TÜV Rheinland: International TIC provider active in wind turbine type and project certification, grid code testing, and component certification. Comparable as a multi-region accredited competitor with overlapping scope in IEC 61400-22 and FGW-based testing.
• TÜV NORD: German-rooted TIC group with wind energy certification and inspection services. Comparable as a domestic competitor operating similar DAkkS-accredited certification and testing services for wind turbines.
• Element Materials Testing: Global testing provider with energy sector capabilities including electrical and grid-related testing. Comparable as an accredited laboratory competitor for the testing and electrical characterization work WindGuard performs.
• DNV: Global assurance and certification body with one of the largest wind energy certification practices, including type and project certification under IECRE and component certification. Directly comparable as a competing accredited certification body serving the same wind OEMs and developers.
• Applus+: International testing, inspection and certification company with energy and renewables service lines. Comparable as a broad TIC peer with renewable energy certification and field testing offerings that overlap with WindGuard's scope.
• Intertek: Global TIC group with wind energy testing and certification capabilities including grid compliance and component testing. Comparable as an accredited competitor offering overlapping FRT, electrical, and project certification services internationally.
• TÜV SÜD: Global testing, inspection and certification group with wind energy type certification, project certification, and accredited laboratories. Comparable as an accredited certification body offering the same regulatory-recognized services to wind OEMs and developers.

Direct peers

• DEWI-UL (UL Solutions): Specialized wind energy certification and measurement institute, historically DEWI/OCC, now part of UL Solutions. One of the most direct peers, offering type and project certification, load measurements, and grid code compliance work to the same European OEM customer base.

Emerging players

• COWI: Engineering consultancy with a strong offshore wind project advisory and certification-support practice. Comparable as a peer in the offshore wind project certification and inspection ecosystem, particularly for BSH- and IECRE-type engagements.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/windguard-certification

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about WindGuard Certification GmbH