sentences:  The Volt/Ampera family of vehicles, with global sales of over 83,600 units, ranked as the world's best selling plug-in hybrid and the second best selling plug-in electric car ever, after the Nissan Leaf, which has sold over 140,000 units worldwide.The Prius Plug-in Hybrid ranked second in global plug-in hybrid sales, with 65,300 units sold worldwide through September 2014.On 1 December 2014 BMW announced the group is planning to offer plug-in hybrid versions of all its core-brand models using eDrive technology developed for its BMW i brand plug-in vehicles.