UL Certifies Senvion MM92 Wind Turbine Loads
UL Solutions issued a Load Component Certificate for the Senvion MM92 model, supporting ACT Blade's ACT100 retrofit programme.
Updated on Nov. 6, 2026 in Energy
UL Solutions has issued a Load Component Certificate covering the load simulation model of the Senvion MM92 wind turbine under IEC 61400-1 Edition 3 Amendment 1. The certificate is part of ACT Blade's effort to prepare its ACT100 retrofit blade for commercial deployment.
Why it matters
The certificate gives an independently certified reference for MM92 loads in its original configuration, which the retrofit design can be assessed against. It may offer owners of ageing MM92 wind farms an alternative to full turbine replacement.
The certificate is a third-party load component certification under IEC 61400-1 Edition 3 Amendment 1, and the retrofit blade is 49.2 metres long for a 2 MW platform. The source does not state the original MM92 blade length for comparison, and site-level performance remains unassessed.
The players
UL Solutions
UL Solutions is a global safety science company that provides testing, inspection and certification services across many industries.
Senvion
Senvion is a German wind turbine manufacturer whose MM92 model is a 2 MW platform used in wind farms worldwide.
ACT Blade
ACT Blade is a company developing lightweight retrofit wind turbine blades, including the ACT100 designed for the Senvion MM92.
The details
ACT Blade's ACT100 is a lightweight retrofit blade developed for the Senvion MM92 2 MW platform, combining increased aerodynamic performance with lower structural mass. Because only the blades are replaced, existing towers, foundations and grid connections stay in use.
Timeline
Article on the MM92 certificate was published on 6 November 2026.
Big Picture
The ACT100 retrofit targets the installed base of Senvion MM92 turbines rather than new builds, offering a blade-only upgrade path. This places the certificate within the broader effort to extend the life and output of existing wind assets.
For operators of ageing MM92 wind farms, a certified blade-only retrofit could be weighed against full turbine replacement. Whether it lowers investment or permitting needs depends on site assessments not yet described in the source.
The takeaway
Blade-only retrofits may let owners extend the working life of existing wind turbines without replacing towers and foundations. Certification of the baseline loads is a practical first step before any site-specific evaluation.
Further reading
Explore more on Energy developments such as turbine and renewable power technology.
Source note: This article includes information reported by Windtech-international.
