Family economists need no more headaches when calculating the energy consumption of their cars. But under one condition, though. The car should be the green-laurels-winning Chevy Volt.

German manufacturer General Motors’ OnStar is testing its new app that records the cost of charging your Volt and will give a fair comparison of it with your home energy conception.

The OnStar app called the EcoHub collects the total energy consumption data from your local electric company or a smart meter company and easily comapare them with the Volt charging information. Based on the local electricity rates, the app can also calculate total energy cost.

By using the app you can be part of a national/global movement aimed at reducing fuel consumption called ‘Ticker’ from EcoHub. It shows the Volt driver what the national values are for the total mile driven and Total EV miles driven plus the total gallons of fuel you saved.

The app is now being tested. The first lucky ones to use this would be the smart grid living community Volt owners residing in Pecan Street demonstration project. They are now put to hardships over the surprising electricity bills that come to them each month.

A GM spokesman said they will need cooperation from third party sources to expand the availability of the EcoHub. Hope that happens very soon.