As if the annual 10% decline in electrical output of offshore wind turbines is not bad enough the failure rate is beyond alarming. It has been kept very quiet, but industry insiders are being warned to divest of all things Wind Turbine related. It is very much sounding like a simple technology failure. Wind Turbines are not suitable for the harsh conditions that is the extreme weather of our oceans. You better believe investors are not going to be looking to do lose money in this market. This may be a problem for thousands of Wind Turbines! Type Failure or Wear and Tear in European Offshore Wind? - The Global Warming Policy Forum (GWPF) There is a lot more at stake here than the allocation of a painful repair bill. If this is a type failure affecting the SWT 3.6 MW device only, then it is a very expensively learned lesson, bad news for Siemens, perhaps hitherto regarded as the premier manufacturer of wind turbines, and unlikely to be forgiven by investors, but of only indirect significance for the wider industry. But if the need for these repairs is, as Siemens is apparently contending, just every day wear and tear, then this sort of problem is unlikely to be confined to the SWT 3.6 MW device, and will be strong evidence confirming long-held suspicions that developers and owners have greatly underestimated the normal cost of wind farm Operation and Maintenance (O&M).