Question

maintenance and generation costs are negligible. in wind turbines. why?

Answer 1

Maintenance and generation cost:

In wind turbines the generating power is the natural wind which is free of course hence the main component as in other turbines like in gas turbine and steam turbines , gas and steam respectively are causing lot of money but in wind turbines it's free of cost. It is the main reason that generation cost is negligible . Only money you have to spend in these turbines is for lubricants ,small maintenance and similar small stuffs.

And generally these turbines are designed for the open environment hence these are robust by design and they have very little auxiliaries and controlling circuits so also they require low maintenance cost.