Most of the readers of Rethink energy won’t have heard of Liberty Global, at its heart it is a cable TV company, and its venture capital arm Liberty Global Ventures, has a history of making investments closer to its original European HQ of Amsterdam and its original technology area. Most of those investments have been in and about things that directly affect its business today – getting video to phones in better condition, improving the WiFi in your home (Plume), all the better to delivery video to multiple devices, and the WiFi chipmaker that supplies its set top boxes (Celeno). But this week it has announced a deal with Zouk Capital on an electric vehicle charging network. Over the last…