R&D Test Systems has designed and delivered the new Highly Accelerated Lifetime Testing (HALT) test bench for wind turbine nacelles at the Danish test centre Lindø Offshore Renewables Centre (LORC).The new HALT XL test bench is mounted on a 30-metre-long concrete base and it features a 25MW drive motor that is 15 metres in diameter and the system can deliver a tilt moment of 85 million Nm. The HALT XL test bench at LORC utilises a stepped stress-testing approach that exposes prototype products to diverse accelerated stresses to discover the physical limitations of a design and ascertain product reliability. The prototypes can be exposed to all the stresses and strains they could reasonably be expected to endure during a 20-year lifetime.