This is a set of five different harvesters that can be carried along for the everyday energy harvesting in the city.

With its solar panels under its wings and suction cups as feet, this harvester can easily be attached to shop windows, street lamps or illuminated advertising at night for charging.

Just like a reversed speaker, this harvester transforms sound into energy. Intended for loud surroundings with sirens, public speakers, alarm bells and so on.

This harvester turns differences in temperature into energy, such as in badly isolated buildings, freezers, heat lamps etc.

With piezos as feet, this harvester collects vibrations on buses, trams, next to construction sites or busy streets.

The small windmill works in streams of exhaust, ventilation systems, or when attached to bus windows.