Renewable Energy Transition in Sri Lanka: Status, Potential, Policy Environment and Future Directions.

Abstract

This study investigates the advancement of renewable energy in Sri Lanka with four primary objectives to assess the current status of renewable energy, to evaluate its potential economic and environmental benefits, to review the institutional and policy framework governing the sector, and to propose policy recommendations for the development of the renewable energy sector. The research addresses key questions regarding the present status and future potential of renewable energy in meeting the power demand of the country, the motivations and obstacles within existing government policies, the net benefits to producers, users, and the nation, constraints in public perception, and the policy interventions required to support a sustainable energy future. The study adopted a mixed-methods approach, combining quantitative financial analysis with qualitative thematic inquiry. The quantitative component focused on rooftop solar, analyzing a subsample of 113 net-account projects using Net Present Value (NPV), Internal Rate of Return (IRR), and Payback Period. Results show that IRR values ranging from 3% to 40%, with most projects, clustering between 6% and 20% and an average IRR of 19.7%. When the time value of money was ignored, simple payback periods ranged from 1 to 13 years, averaging below 10 years, aligning superficially with vendor claims of rapid payback. However, discounted analysis at 9% extended payback periods to 1–29 years, with many small projects (<5 kW) unable to recover costs within 10 years. At an 11% discount rate, 28 projects required a tariff above LKR 37 (the highest CEB rate), 43 required more than LKR 27, and 53 required over LKR 22, while the remainder remained viable at lower tariffs, some of the projects sustainable at LKR 15.50. To secure a minimum IRR of 7%, an average purchase price of about LKR 21.50 per unit is required. The analysis also highlighted project heterogeneity and irrational investment behavior. Differences in installation cost, loan conditions, self-consumption patterns, and contracted tariffs mean that blanket statements about solar economics are misleading. In some cases, oversized systems, high-interest financing, or mismatched system sizing explained poor financial outcomes despite favorable technical potential. The qualitative component explored social acceptance of large-scale and community-based renewable projects. The analysis of Thambapavani wind project revealed widespread dissatisfaction among local residents, citing lack of prior consultation, limited local employment, environmental and livelihood impacts (particularly on fishing and agriculture), and perceptions of misinformation or poor communication from project authorities. These findings show that technically robust and well-financed projects may still suffer from legitimacy deficits without meaningful participation, transparent benefit-sharing and sustained community engagement. Assessment of Mini-hydropower projects at three sites in Badulla District namely, Loggal Oya (1.0–1.5 MW), Ambagaha Oya (1.0–1.5 MW), and Komukan Oya (400–500 kW), surfaced concerns about ecological impacts on endemic fish species and riverine ecosystems during low-flow periods, negative impacts on tourism and recreation (especially at Komukan Oya waterfalls), and potential conflicts with irrigation demand (particularly at Ambagaha Oya). While communities acknowledged the low-carbon benefits of mini-hydro, they emphasized that ecological and livelihood risks must be addressed before acceptance can be secured. In addition to project-level insights, systemic challenges were identified in Sri Lanka’s generation, transmission, and distribution infrastructure, along with gaps in coordination, financing, and regulatory enforcement within the institutional framework. Taken together, the findings highlight that renewable energy development in Sri Lanka is both financially feasible and socially desirable under certain conditions, but its success depends on sound tariff and financing policies, rigorous environmental safeguards, and inclusive community participation. The study leads to data-driven policy recommendations for government, project developers, and funding institutions aimed at ensuring renewable energy development that is technically viable, financially attractive, socially inclusive, and environmentally sustainable.