Buried within a recently released Southern California Edison (SCE) white paper titled "Charged Up" was this promising detail: SCE is getting its grid ready to serve the estimated 350,000 plug-in vehicles that will be within the utilities service area by 2020.

Volt in HOV Lane

Volt in HOV Lane

This estimate may seem high, but it's not coming from some market research firm who may or may not received funding from either big oil or a green interest group.  Nope, this estimate comes straight from the company who's responsible for supplying juice to the booming number of plug-in in the Southern California region.

SCE says that it currently provides power for around 10% of all of the plug-ins on the roads in the US today.

So, if we do some number crunching and assume that SCE will keep steady at that 10%, then by 2020 there could be 3.5 million plug ins on US roads.

Surely that's some crude math and the 2020 result could vary dramatically, but it at least gives us an idea of what to expect from a utility company's perspective.

SoCal ED's White Paper can be found here

SCE Service Area Map

SCE Service Area Map