In this article, we will explore the what, where and why of HomePlug Green PHY(HPGP) in layman terms for quick and easy understanding. HPGP is a reduced subset of HomePlug communication specification for use in Electric Vehicles (EV) charging, smart meters, small appliances like HVAC thermostats, and home appliances. HPGP is designed for rates of up to 10Mb/s since high data rates are not required for it’s intended applications. Data connectivity over home/building network to the power utility is expected; along with the main requirements of low-power, low-cost, compact size and reliable communications. In terms of power consumption, HPGP was designed to be up to 75% less energy consuming than HomePlugAV (HPAV). HPAV is the 2nd generation of HomePlug targeting multimedia broadband data over power lines.