An SAE J1772 level 3 DC EVSE differs greatly from the common level 1 and level 2 standard. The level 3 contains it’s own high voltage AC-DC power supply, which will bypass the one on the vehicle to provide very high power charge levels. These are typically on the order of 200–450VDC and 200A (up to 90kW). The incredibly high charge rate for DC chargers requires significant changes from the level 1 and 2 requirements. The DC source for these is typically a local storage medium capable of delivering the large instantaneous power for charging, and then recharged at a lower rate from the grid. The pilot communication is also insufficient since the EVSE and vehicle need to be in constant communication regarding charge status and power requests. There are various communication standards competing for this, but Power Line Communication is the current front runner.

Charging stations for electric vehicles may not need much new infrastructure in developed countries, less than delivering a new alternative fuel over a new network.[18] The stations can leverage the existing ubiquitous electrical grid and home recharging is an option, since most driving is local over short distances which reduces the need for charging mid-trip. For example, in the United States, 78% of commutes are less than 40 miles (64 km) round-trip.[19] Nevertheless, longer drives between cities and towns require a network of public charging stations or another method to extend the range of electric