If you seek the truth, diversify your sources and don't take article from 2013 or even 2000 when talking about energy and grid. For wind power he is taking the

If you seek the truth, diversify your sources and don't take article from 2013 or even 2000 when talking about energy and grid. For wind power he is taking the example of a wind turbine of 175 kW of nominal power... Most onshore turbine are 10 more powerful, and Siemens Gamesa has a 14 MW offshore turbine in the works For storage, he is taking totally stupid hypothesis (nobody want to use 100% onshore old wind turbine with no change to the current demand and 1 week of total backup), and one old technology, and is never mentioning demand response or thermal storage... A 100% renewable grid, would require big (profitable) energy efficiency investment, big investment in thermal storage and demand response, some onshore wind, some offshore wind, some solar facing different direction, some biomass, a bit of geothermal power when available, and hydro power like now... Some smart grid and a bit of electrical storage (many different technology available).