As recently as August 2012, dena produced completely inaccurate estimates of future peak and base power prices. By 2020, base power was to cost 46.91 euros per megawatt-hour, equivalent to 4.69 cents per kilowatt-hour. In reality, wholesale prices are falling, and the average base price in May was around three cents per kilowatt-hour, a third lower than dena forecast less than two years ago. Source: dena.