Most electric vehicle charging occurs at private residences. There are 3 levels of chargers. Level 1 chargers are normally those that are included with the purchase of the vehicle. It involves a standard home 120v outlet. Charging times run 8 to 15 hours. Level 2 chargers are what most residential and public spaces use. Its applications range from residential, workplace, and multi-unit buildings. The power supply for a level 2 is a dedicated 240v line (similar to an electric dryer outlet) with charging times run between 3 to 10 hours.Level 3 chargers are the fastest and consequently are best suited for charging sites with high demand. The power supply requires a 20-150 kW charging station. There are different types of connector standards that interlock the charging cable with the vehicle. The Level 2 charge "connector" used most by current models is the SAE J1772. For level 3 charge connectors, connector standards such as CHAdeMO and SAE Combo CCS connector will make a Level 3 charger compatible with most models of electric vehicles.