Nissan leads global sales within the Alliance, with about 500,000 cars and vans sold by April 2020, followed by the Groupe Renault with more than 273,550 electric vehicles sold worldwide through December 2019, including its Twizy heavy quadricycle. Mitsubishi's only all-electric vehicle is the i-MiEV, with global sales of over 50,000 units by March 2015, accounting for all variants of the i-MiEV, including the two minicab versions sold in Japan. The Alliance best selling Nissan Leaf was the world's top selling plug-in electric car in 2013 and 2014. Until 2019, the Nissan Leaf was the world's all-time top selling highway legal electric car with global sales of almost 450,000 units by the end of 2019. The Renault Kangoo Z.E. utility van is the European leader of the light-duty all-electric segment with global sales of 50,836 units through March 2020. Other leading electric vehicles manufacturers are BAIC Motor, with 480,000 units sold, SAIC Motor with 314,000 units, and Geely with 228,700, all cumulative sales in China . BMW is also a leading plug-in car manufacturer, with over 500,000 plug-in electric cars sold globally by December 2019, but its electrified vehicle lineup only includes one all-electric model, the BMW i3, with 165,000 units delivered up to January 2020, including the REx variants. The following table lists the all-time best-selling highway-capable all-electric cars with cumulative global sales of around or more than 150,000 units since their inception through March 2020: Any car can be converted to an electric vehicle using plug and play kits of making custom solutions. The conversion of internal combustion engine cars to electric cars is called Retrofitted Electric Vehicles. Global sales of highway legal plug-in electric passenger cars and light utility vehicles achieved the one million milestone in September 2015, almost twice as fast as hybrid electric vehicles (HEV). Cumulative global sales of light-duty all-electric vehicles reached one million units in September 2016. Global sales of plug-in passenger cars passed 2 million in December 2016, the 3 million mark in November 2017, the 5 million milestone in December 2018, and totaled 7.2 million units in December 2019. Despite the rapid growth experienced, the global stock of plug-in electric cars represented just about 1 out of every 250 vehicles (0.40%) on the world's roads by the end of 2018.  , the global stock of pure electric passenger cars totaled 4.79 million units, representing two-thirds of all plug-in passenger cars on the world's roads.