After intense case studies and tests, the five German car manufacturers (Audi, BMW, Daimler, Porsche and Volkswagen) chose to support HomePlug's IEEE 1901 Profile Green PHY (GP) as the technology for the charging interface of electric vehicles. The HomePlug Powerline Alliance serves as a compliance and certification body for IEEE 1901, and manages the largest compliance and interoperability certification program for powerline networking products.

The HomePlug GP specification, finalized in June 2010, is a low power, highly reliable and cost-optimized powerline networking specification which targets "Smart Grid" applications such as appliances, smart meters, climate control, and plug-in electric hybrid vehicles. Utility companies and manufacturers are looking to adopt communications and networking technologies, such as HomePlug GP, to help consumers and businesses monitor and reduce their energy consumption.