a b s t r a c tAlthough photovoltaic (PV) systems have become much more competitive, the diffusion of PV systems still remains low in comparison to conventional energy sources. What are the current barriers hindering the diffusion of PV systems? In order to address this, we conducted an extensive and systematic literature review based on the Web of Science database. Our state-of-the-art review shows that, despite the rapid development and maturity of the technology during the past few years, the adoption of PV systems still faces several barriers. The wide adoption of PV systems-either as a substitute for other electricity power generation systems in urban areas or for rural electrification-is a challenging process. Our results show that the barriers are evident for both low-and high-income economies, encompassing four dimensions: sociotechnical, management, economic, and policy. Although the barriers vary across context, the lessons learned from one study can be valuable to others. The involvement of all stakeholders-adopters, local communities, firms, international organizations, financial institutions, and government-is crucial to foster the adoption.

a b s t r a c tWith diffusion theory as the point of departure, this study analyses the factors that influence the adoption of renewable electricity from individual households' perspectives. The analysis is based on a case study provided by a Swedish energy service company operating in rural Uganda. The company distributes electricity to rural households via a mini-grid powered by a biomass gasification system. Three critical dimensions are identified to be crucial for adoption: technical, economic, and social. First, there is an emphasis on the relative advantages of the new technology. Second, there are economic requirements regarding a viable financial system for adopters, especially in such a low-income market. Third, the social dimension is critical, particularly the importance of foreign firms collaborating with local actors. We further suggest that a lack of understanding of local communities can lead foreign companies to fail in diffusion attempts. While we focus on Uganda, the results of our research are highly relevant for foreign actors who attempt to penetrate rural markets in developing countries in general.

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Indonesia is facing challenges on the lack of electricity access in rural areas and the management of agricultural waste. The utilization of waste-to-energy technology can help in mitigating these issues. The aim of this paper is to assess the economic viability of a biomass gasification system for rural electrification by investigating its competitiveness in relation to various government supports. Financial modelling is applied to calculate Net Present Value (NPV), Internal Rate of Return (IRR), and Levelized Cost of Electricity (LCOE). NPV and IRR results indicate that biomass gasification is an economically viable option when appropriate financial government supports exist. LCOE result indicates that biomass gasification system is already more economically competitive compared to diesel generator even without additional support but it is less competitive compared to the national electricity grid tariff. In conclusion, the biomass gasification system is an economically viable option for rural electrification in Indonesian context.

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