ENERCON E 66: How appraisals influence the purchase price of a used old system

On the secondary market, the ENERCON E 66 stands out as one of the most sought-after wind turbines. Their popularity is due not only to their robust construction and easy disassembly, but also to the ability to continue to use them efficiently after 20 years of operation. However, for buyers, especially from abroad, it is crucial not only to assess the current condition of the plant by means of neutral expert opinions, but also to obtain further operating forecasts for the new location .

Federico Osvald of UL Solutions, an expert who is very familiar with the ENERCON E 66, points out: "The E66 is a very common robust wind turbine. The design was carried out for wind zone III in accordance with DIBt 1993 and is therefore very well suited for the majority of German locations. However, it is important for the buyer to have the new location evaluated, which often finds completely different conditions. However, the issue of lightning protection is difficult to prove and the weak point on the tower head flange can be observed - each type of system must be considered individually."

Buyers and sellers benefit!

When considering the purchase or continued operation of a used ENERCON E 66, neutral expert opinions are essential. These appraisals not only provide a comprehensive assessment of the condition of the plant, but also provide valuable insights into the possible remaining service life and performance at the new location. Experts such as Federico Osvald carry out detailed investigations, ranging from visual inspections of key components to detailed analyses of operational data. Particular attention is paid to critical aspects such as lightning protection and the integrity of the tower head flange in order to identify potential risks to the safety and performance of the plant.

This assessment underlines the importance of detailed inspections, which ENERTRAG carries out "in the field" in cooperation, including with state-of-the-art drone technology, which can be seen here in the video! and analytical assessments conducted by service companies such as UL Solution to provide comprehensive information to potential buyers. It is also interesting to note that the seller can also benefit from a positive forecast for continued operations. The longer a reliable forecast is issued, the higher the selling price!

The ENERCON E 66, which is available in different power classes – 1.5 MW, 1.8 MW or 2 MW – is characterised by impressive technical specifications. With a rotor diameter of 66.0 meters and a rotor area of 3,421.2 square meters, this onshore turbine can start generating energy at a switch-on speed of 3.0 m/s. The nominal wind speed is 12.5 m/s, while the turbine is shut down at a wind speed of 25.0 m/s. Their survival speed is an impressive 70.0 m/s, which underlines their robustness.

That's why the Enercon E 66 is so attractive for investors!

The efficiency of a wind turbine is often measured by its power density, an area in which the E 66 also shines. With a power density of 438.4 W/m², it offers an optimal balance between size and power generation capacity. These technical features make the E 66 an attractive option for investors looking for sustainable energy solutions that are both powerful and adaptable to different site conditions.