evidence: Public policy should take action to expand solar energy in underrated places. [...] This motivation meets the interest of Energy Policy's readers, confirmed from the scientific contribution generated by research Jayaweera, Jayasinghe and Weerasinghe (Jayaweera et al., 2018). This study provides an insight into how domestic PV adoption operates in a small developing country, Sri Lanka. From the perception that in developing countries, only limited researches have been conducted on the viability of micro-generation PV as a mainstream clean energy source for greening the electricity grid. In the Brazilian scenario, this approach is discussed in this article. [...] Local factors affecting the spatial diffusion of residential photovoltaic adoption in Sri Lanka