Direct current is the future

A world with direct current grids instead of alternating current grids. Is that possible? Sustainable generation of electrical energy is always linked with DC voltage. Solar cell systems produces a DC voltage, wind turbines always convert the AC voltage with a variable frequency in a DC voltage to convert it in an AC voltage with a constant frequency. Sustainable energy is becoming more and more important in the future. Here in North Europe large offshore wind turbine parks are planned. Solar cell systems on roofs of houses, thermal heat installations in houses, small urban wind turbines will become more and more popular. When you look to the loads, then you see an explosive numbers of appliances in households, offices and industry that run on low voltage direct current. It is clear that a DC voltage grid is a logical next step.