- U.S. Department of Energy: Charging Plug-In Electric Vehicles at Home
- EERE: Vehicle Cost Calculator
- Idaho National Laboratory: Comparing Energy Costs per Mile for Electric and Gasoline-Fueled Vehicles
- Plug In America: How Much Does It Cost To Charge An Electric Car?
- How Stuff Works: How Much Does It Cost to Charge an Electric Car?
- San Diego County: Electric Vehicle Costs & Incentives.