Wind Energy: HOW LONG TO PAYBACK ENERGY INVESTMENT?

EPP - Energy Payback Period
  How long does it take to recover the energy used for manufacture, construction, operation  and decommission of the modern large-scale wind turbine?  Speaking strictly of  ENERGY, not monetary investment......   here's what the experts say...

    1.   6 - 7 months   
              ( vesta, treehugger, renewableenergyworld.com )1.1 years                                     (  parliament.uk )
   
    2.   3 - 5 months  
             IWEA  Irish Wind Energy Association

    3.   2 - 3 months 
                   ( busiunion.com)

    4.   3 - 8 months
                   ( Orion renewable energy group )

                      5.   10 months or less
                                  (uiowa.edu)

                  6.   4.8 - 8.1 months
                                       Danish Environment Ministry

                 7.   3.8 - 8.4 months 
                          German Ministry for Tech Development, 80m rotor dia, 3 MW

Dimmable Soft LED Light Bulbs are SERIOUS Energy Savers

       ref:
(1. parliament.uk  2. iwea.com  3. busiunion.com 4. orionrenewables.com 5. uiowa.edu 6. wind-works.org 7. wind-works.org)  EPP varies with location, turbine size, conditions, manufacturer,- detailed ref. on request.)