||Present indoor navigation techniques are relatively costly and little widespread. We believe that solar cells might be able to provide a partial solution by minimising hardware investment, providing useful data about the user environment and acting as an energy harvesting power source. In this paper the related state of the art is briefly reviewed, a vision of the implementable systems is provided, hypotheses with regard the use of solar cells as location aids are developed and planned experimentation is described. We conclude that obtaining both ”power and data would” be a novel use of an energy harvesting technology in the wearable computing domain. Such a combination would support the case that other energy harvesting technologies could also be used for providing energy and data. Applications can also be forseen beyond wearable computing.