Proposing a Framework for Consumers' Decision on Solar Innovations for Smart Cities

The developed and developing countries have ambitious plans to generate solar power for a better environment. Thus, adopting solar innovations is integral to creating a green world. This study proposes a framework integrating the factors that affect consumers' decisions to adopt or reject solar innovations. For this purpose, we used a systematic literature review to gather potential technology acceptance theories and factors investigated in these studies. Out of 1531 initially searched articles, twenty-four (24) were found relevant and screened fully. The findings revealed that the Diffusion of Innovation (DOI) theory was dominant in evaluating the solar innovation decision by the consumers, followed by the Theory of Planned Behaviour (TPB). Moreover, the DOI's innovation characteristics (relative advantage, complexity, observability, compatibility, and trialability) were the most widely used factors for assessing solar innovations' decisions by consumers. The public and private institutions should consider technological characteristics and the households' characteristics to formulate policies for scaling up the adoption of solar innovations.