In Brief: Most people don't cover long distances with their cars in their daily life. Even in the USA, an automotive stronghold, the average mileage per day is only around 50 kilometers. And yet, battery-electric vehicles have a tough time on the market. This is caused by high purchase prices, a wide-meshed charging net and limitations in reach, to name a few. Until solutions have been found for these weaknesses, the plug-in hybrid electric vehicle (PHEV) can immediately ensure low-emission mobility. Charged with sustainably generated power from electrical outlets, PHEVs drive with zero emissions, primarily in cities strongly impacted by exhaust gasses. Over long distances, the combustion engine optimizes fuel consumption while providing sufficient range.