Have you seen this Plug In Hybrid Vehicle (PHEV) company yet? Hymotion: http://hymotion.com/index.htm They are making PHEV products for the Prius and Escape Hybrid and Mariner Hybrid. Future vehicles they plan to make pluggable are the Rx 400h, Highlander Hybrid and the Camry Hybrid. Right now they appear to be selling to fleets only. After some more proving they will sell to the consumer.