*2.1. Literature Survey*

The literature survey included a systematic four-step literature review where Scopus was used to locate the published literature.

In the first step, a combination of keywords was identified as follows: ("barriers" OR "opportunities") AND "PV". This combination was searched for in the abstracts, titles and keywords of the publications from 2012 to 2020 yielding 264 journal papers. Note that the search was not restricted to Kenya but yielded results from analyses worldwide to capture barriers and opportunities more generally.

In the second step, each publication was evaluated for its relevance to the integration of PV systems in the electricity generation mix, based on the abstract, title and keywords. If a publication had relevance, it was eligible for inclusion in the third step. This resulted in 102 journal papers.

In the third step, the full texts were evaluated in detail for their relevance to the barriers and opportunities for integration of PV technology in Kenya's electricity generation mix. This procedure ensured that no relevant information was missed from the publications. If a study addressed any kind of opportunity or barrier to the diffusion, it was included for analysis in the fourth step. Consequently, this resulted in 46 journal papers.
