Rosendahl Windtechnik GmbH

What Rosendahl Windtechnik GmbH does

Rosendahl Windtechnik GmbH is a privately held German inspection and expert assessment firm specializing in wind energy systems, headquartered in Krummhörn, Germany. Founded in 2006, the company operates as an independent accredited inspection body under Deutsche Akkreditierungsstelle (DAkkS) accreditation Type C per DIN EN ISO/IEC 17020 (certificate D-IS-21476-01-00). It serves wind farm operators, individual turbine owners, municipal utilities (Stadtwerke), and energy cooperatives across Germany, issuing expert reports that are accepted for regulatory compliance, insurance, and continued-operation decisions.

The firm's offering combines accredited recurring inspections (Wiederkehrende Prüfung, WKP), continued operation assessments (Weiterbetriebsgutachten, BPW), rotor blade inspections using rope access, lightning protection testing, condition-based inspections, general plant walkthroughs, damage assessments, commissioning assessments, and warranty acceptances. These are complemented by analytical diagnostic services including vibration diagnostics for early bearing-damage detection with remaining-life prognostics, endoscopy, thermography, and pitch angle measurement. The underlying technology stack is conventional rather than software-native: specialized diagnostic instruments applied by accredited inspectors on-site at customer turbines, with no disclosed digital platform, APIs, or AI components.

Rosendahl operates a direct field-services go-to-market model with on-site delivery at customer turbine locations throughout Germany. Revenue is professional-services based, generated per project via individualized quotes against multi-year contractual relationships with fleet operators running Enercon, Vestas, and Nordex platforms. The firm is small (5 employees), privately held with no disclosed external funding, institutional ownership, subsidiaries, or M&A activity, and its pricing power rests primarily on its DAkkS regulatory accreditation and 18+ years of specialized track record rather than on scale or technology differentiation.

Name

Rosendahl Windtechnik GmbH

Legal name

Rosendahl Windtechnik GmbH

Website

https://rosendahl-windtechnik.de

Company type

Private

Founded year

2006

Operating status

Operating

Headcount range

1–10 employees

Short description

Rosendahl Windtechnik GmbH is a Germany-based, DAkkS-accredited Type C inspection firm specializing in recurring wind turbine inspections, continued-operation assessments, and condition diagnostics for wind farm operators, municipal utilities, and energy cooperatives.

Ownership category

akta.pro rank

Product category

Wind Turbine Inspection Services

NAICS

Testing Laboratories and Services (541380)

SIC

Services-Testing Laboratories (8734), Engines & Turbines (3510)

akta.pro primary industry

Wind Component Service, Repair & Refurbishment (Blades, Gearboxes, Bearings) (EUAMACAI)

akta.pro secondary industry

Inspection Services (Ground, Aerial/Drone, Helicopter, Climbing) (EUADAJAC)

Keywords

• Wind turbine inspection
• Expert assessment services
• Condition-based diagnostics
• Rotor blade inspection
• Vibration analysis services

Headquarters

HQ city

Krummhörn

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Inspection and Assessment Services: Professional services revenue from conducting accredited wind turbine inspections, expert assessments, and technical evaluations. Services include recurring inspections (WKP), rotor blade controls, continuation assessments, damage reports, and commissioning assessments. Revenue is generated on a per-project basis with individualized quotes.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels1 record

Core offering

Rosendahl Windtechnik GmbH provides DAkkS-accredited wind turbine inspection and expert assessment services across Germany, including recurring inspections (WKP), continued-operation assessments (BPW), rotor blade inspections (RBK), lightning protection testing, condition-based inspections, damage and commissioning assessments, and warranty acceptances. These are complemented by analytical diagnostic services—vibration diagnostics, endoscopy, thermography, and pitch angle measurement—delivered on-site to wind farm operators, individual turbine owners, municipal utilities, and energy cooperatives.

Product overview

Rosendahl Windtechnik GmbH is an independent inspection and expert assessment firm for wind energy systems, offering a unified portfolio of accredited inspection services under DAkkS Type C accreditation. The core services include recurring inspections (WKP), continued operation assessments (BPW), rotor blade controls (RBK), lightning protection tests, condition-based inspections, general plant walkthroughs, damage assessments, commissioning assessments, and warranty acceptances. These are complemented by analytical diagnostic services including vibration diagnostics, endoscopies, thermography, and pitch angle measurements. All services are delivered as professional consulting and inspection offerings, not software products.

Differentiator

Problem solved

Functional benefit

Products and services

• Wiederkehrende Prüfung (WKP) - Recurring Inspection Accredited inspection service that verifies the entire wind turbine, safety equipment, and structural stability of the entire construction. Targeted at wind turbine operators, wind park operators, municipal utilities, and energy cooperatives in Germany.
• Weiterbetriebsgutachten (BPW) - Continued Operation Assessment Accredited inspection service providing the required continued operation testing for wind turbines as defined by certification standards, enabling operators to continue operating turbines beyond their initial design life.
• Rotorblattkontrollen (RBK) - Rotor Blade Inspections Rotor blade inspection service using rope access techniques externally and inspecting accessible areas internally, addressing the high repair cost of blade damage. Targeted at wind turbine operators across Germany.
• Blitzschutzprüfungen - Lightning Protection Inspections Lightning protection inspection service for wind turbines, verifying the integrity of lightning protection systems on turbines.
• Zustandsorientierte Prüfung - Condition-Based Inspection Condition-based inspection service that assesses the current technical condition of a wind turbine, identifies initial damage, and helps prevent follow-up damage.
• Allgemeine Anlagenbegehung - General Plant Walkthrough Technical inspection of a wind turbine and its immediate operational auxiliary facilities, providing a general walkthrough assessment of the plant.
• Schadensgutachten - Damage Assessment Expert damage assessment service for wind turbines, providing an independent expert report on the nature and extent of damage.
• Inbetriebnahme-Gutachten - Commissioning Assessment Commissioning assessment service that verifies proper installation and operational readiness of newly erected wind turbines.
• Gewährleistungs-abnahmen - Warranty Acceptance Inspections Warranty acceptance inspection service that verifies turbine condition at the end of the manufacturer's warranty period to support warranty claims.
• Schwingungsdiagnosen - Vibration Diagnostics Vibration diagnostics service that detects damage or emerging damage to bearings at an early stage and creates a prognosis for the probable remaining bearing life, combined with acoustic pattern evaluation.
• Endoskopien - Endoscopic Inspections Endoscopic inspection service used for internal visual examination of wind turbine components that are not accessible without disassembly.
• Thermografie - Thermographic Inspections Thermographic inspection service using thermal imaging to identify heat anomalies in wind turbine electrical and mechanical components.
• Pitchwinkelvermessung - Pitch Angle Measurement Pitch angle measurement service that verifies and calibrates the pitch angles of wind turbine blades to ensure proper aerodynamic performance and control.

Quantifiable outcome

• Increased safety through regular expert monitoring
• +2 more outcomes

Named customers6 records

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Scale indicators2 records

Recent moves3 records

Expansion highlights2 records

Regional players

• Fichtner: German engineering consultancy active in wind energy project advisory, technical due diligence, and operational assessments for wind farm operators and investors.
• Ramboll: Engineering consultancy with a strong wind energy practice in Germany and Northern Europe providing inspection, structural assessment, and lifetime extension studies for wind turbines.

Broad incumbents

• DNV: Independent assurance and risk management firm providing wind turbine certification, type and project certification, and condition assessment services for wind farm operators and developers in Germany.
• SGS: Global inspection and certification firm offering wind energy inspection services including blade inspection, condition monitoring, and recurring inspection programs for European wind operators.
• Bureau Veritas: International testing, inspection, and certification company with a renewables segment providing wind turbine inspections, due diligence, and asset integrity services to operators and investors.
• UL Solutions: Global TIC firm with wind energy offerings spanning turbine inspection, certification, and component testing; relevant comparable for accredited inspection services delivered to wind operators.
• TÜV SÜD: Global testing, inspection, and certification firm with a wind energy practice offering recurring inspections, condition assessments, and continued-operation reports for wind turbines in Germany and worldwide.
• TÜV Rheinland: Global TIC firm offering wind turbine inspection, certification, and condition monitoring services, including recurring inspections and continued-operation assessments in Germany.
• DEKRA: Leading international inspection body with a German wind energy division providing accredited inspection, damage assessment, and operational safety services for wind farm operators.

Direct peers

• Windtest Grevenbroich (part of UL): Specialized wind turbine measurement and inspection services provider in Germany offering power performance, acoustic, and load measurement services; comparable niche inspection services for wind operators.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/rosendahl-windtechnik-gmbh

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

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 Rosendahl Windtechnik GmbH