OEM Reliable converter solutions for every stage of your turbine’s life
Your global partner for lasting wind performance
With deep expertise in wind energy and power conversion, we deliver reliable, flexible, and cost-effective aftermarket solutions, from fast global spare parts delivery to lifecycle-focused upgrades, repairs, and platform-independent service. Our mission is to help operators maximize performance, reduce downtime, and extend the lifetime of their wind assets.
Engineering excellence
and comprehensive solutions
As a leading platform-independent partner, we offer a full range of products and services dedicated to frequency converters for wind turbines.With over 24,500 installations and more than 25 years of combined experience in production, maintenance, and service, we bring unparalleled expertise to maximize the operational safety and efficiency of your wind turbines throughout their entire lifecycle.
years of experience
converters installed globally
installed power
customers worldwide
countries with installations
Over 30 years of converter excellence
Since 1997, we have been dedicated to advancing frequency converter technology for wind energy. From our origins as SEG to today’s ConverterTec, our journey is marked by strong partnerships, strategic growth, and continuous innovation to ensure reliable performance and long-term value for our customers worldwide.
Why customers trust us
Fast and reliable spare parts delivery
- Spare parts shipped within 24 hours
- Global stock availability and obsolescence management
- Repair and retrofit options for obsolete components
Cost-effective, lifecycle-oriented solutions
- Upgrades and retrofits improving LCOE (Levelized Cost of Energy)
- Continuous product improvements and innovation
- In-house test-bay infrastructure ensuring quality
Flexible, customized support
- Full aftermarket offering: spare parts, service, repairs, training
- Flexible repair and delivery options for electronic components
- Close customer collaboration and responsive support
Expert engineering & development
- 24/7 global on-call support
- Strong troubleshooting capability and safety-first approach
- Engineering support for complex converter challenges
Our locations
Global presence, local responsiveness
ConverterTec Aftermarket & Service
Bulgaria
info@convertertec.com
+359 88 406 5917
228 Botevgradsko Shose
Office 15
1839 Sofia, Bulgaria
ConverterTec Aftermarket & Service
Germany
info@convertertec.com
+49 2152 95216-208
Krefelder Weg 47
47906 Kempen, Germany
ConverterTec OEM
Poland
krakow@convertertec.com
+48 12 342 31 00
Ul. Trakt Ojca Św. Franciszka 1
32-002 Brzegi, Poland
With a global network and a new repair center in Bulgaria, ConverterTec ensures fast support and local expertise. Our teams drive innovation, deliver critical parts, and keep converters performing at their best worldwide.
Trusted by our customers
Due to the excellent technical support, high-quality training and fast material availability, we have been working together successfully for many years and will continue to do so.
Prokon Regenerative Energien eG
The power modules developed by ConverterTec Service GmbH for GE 1.x MW converters provide us with a future-proof solution for our wind turbines.
Regarding to the improved availability of the modules, downtime can be reduced to a minimum.
The modules installed by ConverterTec have shown no malfunctions or abnormalities from the time of installation to the present.
Latest news
Fresh news. Real stories. Proven case studies.
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Meet ConverterTec Aftermarket & Service at WindEnergy Hamburg 2026
ConverterTec Aftermarket & Service will be exhibiting at WindEnergy Hamburg 2026, and we look forward to welcoming customers, partners and industry professionals to our stand.
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ConverterTec featured in Kapital: “Wind turbines from Sofia to the world”
ConverterTec was featured in a recent article by Kapital, one of the leading business and economic media platforms in Bulgaria, known for its in-depth coverage
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ConverterTec at WindEurope 2026 in Madrid
ConverterTec Aftermarket & Service will be attending the WindEurope Annual Event 2026 in Madrid from 21–23 April. Visit us at Booth 9-H60 to meet our
Let’s discuss your converter challenges
Looking for a specific part or exploring a long-term solution? Tell us what you need and our team will get back to you.
Responsibility for a sustainable future
We take our responsibility for quality, safety, and sustainability seriously. Certified to ISO 9001, we uphold the highest standards while working toward a cleaner, more efficient future.
Through innovative technologies, climate initiatives, and local support, we aim to make a real difference, step by step, together.
Power tomorrow with us!
At ConverterTec, we’re driving the shift toward smarter, cleaner, and more sustainable energy solutions. After years of successful growth, we’re now focused on shaping the future of renewable energy. That’s why we’re looking for passionate people who want to make a real difference, innovators, problem-solvers, and visionaries ready to power a greener tomorrow.
Explore our open positions and help us build a future where energy is smarter, cleaner, and sustainable for all.
Looking for more details?
Our experts are just a click away.
Germany: +49 2152 95216-208 |
US: +1 970 227 9597
Spain: +34 695 263 461 |
Brazil: +55 19 3514-6262
Japan: +81 43 239 6100 |
Bulgaria: +35 988 406 5917