An Energy Neutral Design is a Design of any type (Website, Multi-media, Architecture, Art, Music, Entertainment, etc.) that has the environment and low energy consumption practices in mind during all stages of planning and production.
Energy neutral design can also refer to environmentally powered electronics, where devices absorb or harvest energy from the immediate surroundings and transform it to the electricity they require for their operation. One example of this is the "Batteryless_radio. More recently wireless sensor networks and internet of things devices have featured energy neutral designs where light, heat, motion or other forms of energy are converted to electricity.