Some do use a proprietary plug on some vehicles, notably Tesla. But the EV industry is coalescing around a single standard. In Indiana, a new state-level initiative in cooperation with other Midwest states like Wisconsin, Ohio, Illinois, and Michigan seek to create a regional, consistent, and sustainable standard for electric car chargers. Most EV owners benefit from a universal plug found at Level 2 AC charging stations. This allows both vehicles with the Type 1 (SAE J1772) and Type 2 (IEC 62196) sockets to both be able to charge. SAE J1772 is the standard US connector and IEC 62196 the standard in the EU. DC Rapid chargers typically have two cables — one with a CHAdeMO DC connector and one with a CCS DC connector, which are the most common non-Tesla connector types.  Tesla supplies an adapter to allow their vehicles to connect to Level 2 chargers, and is in the process of adding the CCS DC connectors to their Level 3 Supercharger stations.