Charging your EV when the demand for electricity is lowest, such as during late evening hours, will help minimize your charging costs.
Calculation in Completed Actions is actual savings which is updated monthly.
If you drive less than 40 miles per day, or drive a plug in hybrid, save money by using the standard (Level 1) charger that came with your car and plugs into a standard (120 volt) wall outlet.
An ENERGY STAR certified charger uses 40% less energy in standby mode. This reduces charging costs, since the average home charger sits in standby mode 85% of the time.