Cogeneration merges the production of usable heat and electricity into a single process that helps to reduce carbon emissions, energy waste and energy costs. Until now, this source of sustainable energy has been used mostly in the industrial sector, the consumer market is unknown. One type of cogeneration system, the Stirling engine, is a heat engine that is operated by a cyclic compression and expansion of air or other gas at different temperatures. This cogeneration system is capable of charging a smartphone’s battery using the heat of everyday objects like a hot cup or a radiator, or a human hand. There are two main goals of this project; 1) is to design and build a small prototype using the Stirling engine technology to generate electricity; and 2) to conduct a market test to assess the appeal of the Stirling sustainable charger among consumers. Online surveys will be employed to conduct research to evaluate overall purchase interest in this new technology. The information to be collected will include demographic and attitudinal characteristics that can be used to help build consumer profiles, and identify which profiles correlate with higher levels of purchase interest for the Stirling sustainable charger. This research will be used to help position the Stirling charge, and to identify key target segments for the marketing of this product.