Renewables: The 99.9 percent solution — The Daily Climate
LONDON – A combination of wind and solar power and sophisticated energy storage systems could keep a power grid fully supplied between 90 and 99.9 percent of the time, at costs comparable with today's fossil fuel and nuclear mix, according to a new study from Delaware in the United States.“With four parameters I can fit an elephant, and with five I can make him wiggle his trunk” | Real Science
...They tweaked their computer model and varied the conditions where they could: they found that consistent wind power could be obtained if the turbine fields were dispersed at distances greater than 1,000 kilometers.
They exploited not just hydrogen fuel cells and batteries for storage, but also grid-integrated vehicles: electric cars and trucks which when not being driven also served as sources for the grid.
They calculated the cost of renewable electricity generation without subsidies from either state or federal government, and when they made comparisons with fossil power, they factored in the external health and other costs of fossil fuel pollution.
What did Von Neumann mean by this? He meant that by using enough input variables, you can get any result you seek.
i.e. the story of climate models.