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The market for plug-in electric vehicles (PEV) is gaining rapidly. Several original equipment manufacturers (OEM) have announced the start of new PEV model production. Hence charging a growing number of PEVs will have a major impact on the power grid, especially on the distribution grid. Effectively utilizing renewable energy for charging the PEV's battery is a major objective for reducing the OEM's CO2 fleet emissions due to increased efficiency of the energy consumption. Uncoordinated charging will lead to an additional load on the power grid and an inefficient utilization of renewable energy. As the charge of a PEV may double an average household consumption and usual plug-in times overlay the household consumption peak in the evening the ability of PEVs to shift their electric charging is considered grid-friendly.