The aim of this paper is to assess the current challenges and barriers to investment in the UK’s Renewable Energy (RE) sector. This is done by analysing various stakeholders’ perspectives of the key factors, namely Regulation, Risk, Resourcing (financing), and Return, in developing a model which will serve as a decision support framework for the investors in the RE space. The research developed an interpretive understanding through a mixed methods approach, using the implicit and explicit knowledge from energy industry experts and senior practitioners currently involved in energy companies and consortia who sponsor, develop, finance and manage RE schemes and projects. The key question posed to stakeholders was: “What is the impact of Regulation, Risk and Resourcing on Return on investment in developing renewable energy projects in the UK?” The study examined the key factors that influence investment decisions in the UK’s RE. The research strategy used qualitative data derived from questionnaires and interviews with leading industry stakeholders and practitioners, including senior executives at prominent financial institutions, technical consultants, project developers and regulatory experts to validate a model of decision making support for investors. The research validated the 4R’s model that considers the impact of Regulation (R1), Risk (R2), Resourcing (financing) (R3) and Return (R4) in supporting investment decisions. The regulatory regime was found to be the primary Risk driver when Resourcing the finance of RE projects. The impact of these key parameters is not linear and varies through the project phases; i) Project Inception and Development, ii) during construction, iii) the O&M and revenue generating phase. It is concluded that the combined influence of R1, R2, and R3 on Return on investment (R4) is shown to be a crucial output of the final, income generating phase of renewable energy projects.
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