The EV Charging Signal Light is a simple disk-shaped LED device that attaches to electric vehicle chargers and acts like a traffic light for grid emissions.

The light glows green when renewable energy is abundant and electricity is being supplied with lower carbon emissions, and red when the grid is relying on higher-emission energy sources.

The device applies real-time feedback and point-of-decision interventions by providing information exactly where charging decisions are made.

Rather than requiring drivers to check an app or electricity dashboard, the signal delivers an immediate visual cue that encourages charging during cleaner periods of the day.

By making grid conditions visible and easy to understand, the EV Charging Signal Light helps shift charging demand toward times of abundant renewable energy.