Pssssst..... maintenance and operating costs figure in at some point. Decentralized electricity generation has thousands of problems. One maintenance crew at one site has to be replaced by hundreds of crews at thousands of sites, with tens of thousands of spare parts and man hours, where just a few were sufficient before.
So you really believe that billions of dollars have been invested in distributed generation without anyone ever considering maintenance costs?
State of the art SCADA and integrated predictive maintenance make wind turbines more reliable and less prone to unplanned downtime.
As of 2016, Minnesota’s wind farms generated 3.8 MW out of the state’s total or 18%. Installed nameplate capacity vs. actual production data proves your assertion that 1/3 are “in failure ore offline” is highly incorrect.
Some assume that when they see some wind turbines not turning on a windy day they have failed. That’s possible but generally not the case. Each turbine is individually controlled and operates when the wind at it’s location is within a specific range (too much has the same effect as too little wind). Planned maintenance is another reason, and is factored into the production schedule. Curtailment also occurs when there is no place to send the power that is generated due to inadequate investment in transmission lines. A key benefit of distributed generation is that output is scalable, and can be adjusted by shutting down some turbines at the request of customers or grid regulators based on generation and consumption needs.