Scaling Rooftop Solar Power in India: Potential for Solar Municipal Bonds

This research paper proposes a 'solar municipal bond model' (SMB) to help India reach its 40 GW rooftop solar target by 2022. The model suggests using municipal entities as finance aggregators to provide project developers with access to debt capital markets, potentially reducing rooftop solar costs by up to 12%.

• India faces a significant gap in reaching its 40 GW rooftop solar target by 2022; as of December 2016, installed capacity was approximately 1.25 GW, requiring an annual installation rate of 6 GW and an estimated investment of USD 39 billion (INR 3 trillion).
• The growth of rooftop solar in India is hindered by three primary barriers: limited access to debt capital, perceived performance risk, and high upfront capital expenditure. Third-party financing has seen limited success because project developers lack access to debt capital due to factors such as stressed commercial banks, high transaction costs for small investments, and concerns over developer credit quality.
• The proposed solar municipal bond (SMB) model positions a municipal entity or corporate municipal entity (CME) as a finance aggregator. This approach leverages the superior credit profiles of municipalities—where 94 rated municipalities are investment grade (BBB- or above)—to raise debt capital at lower costs and disburse it to developers via Public Private Partnership (PPP) structures like Design-Build-Finance and Operate (DBFO).
• Application of the SMB model to Surat and New Delhi indicates a rooftop solar potential of 727 MW (requiring INR 38.5 billion) and 110 MW (requiring INR 6 billion) respectively. The model could reduce costs by up to 12% and tap into an estimated USD 56 billion of untapped debt investment from domestic institutional investors.
• Several critical implementation barriers exist for the SMB model, including the lack of a statutory mandate for municipal corporations to generate electricity under the 74th Constitutional Amendment, SEBI regulations requiring a 20% minimum equity contribution from municipalities, and the need for bonds to achieve high credit ratings (AA or A+) to attract investors in India's shallow debt market.

APA

Climate Policy Initiative (2018). Scaling Rooftop Solar Power in India: Potential for Solar Municipal Bonds. https://www.climatepolicyinitiative.org/publication/scaling-rooftop-solar-power-india-potential-solar-municipal-bonds/

Chicago

Climate Policy Initiative. Scaling Rooftop Solar Power in India: Potential for Solar Municipal Bonds. 2018. https://www.climatepolicyinitiative.org/publication/scaling-rooftop-solar-power-india-potential-solar-municipal-bonds/.

Wikipedia

{{cite report |author=Climate Policy Initiative |title=Scaling Rooftop Solar Power in India: Potential for Solar Municipal Bonds |date=22 February 2018 |url=https://www.climatepolicyinitiative.org/publication/scaling-rooftop-solar-power-india-potential-solar-municipal-bonds/ |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{climatepolicyinitiative2018scaling, author = {{Climate Policy Initiative}}, title = {{Scaling Rooftop Solar Power in India: Potential for Solar Municipal Bonds}}, institution = {Climate Policy Initiative}, year = {2018}, month = feb, url = {https://www.climatepolicyinitiative.org/publication/scaling-rooftop-solar-power-india-potential-solar-municipal-bonds/}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }