Scaling up Rooftop Solar Power in India: The Potential of Solar Municipal Bonds

The report argues that India's 40 GW rooftop solar target by 2022 requires an estimated USD 39 billion in investment, but growth is hindered by high upfront costs and limited access to debt capital. It proposes a Solar Municipal Bond (SMB) model where municipal entities act as finance aggregators, issuing bonds to provide low-cost, long-term debt to private developers via capital lease arrangements. This model could reduce rooftop solar costs by up to 12%. Case studies in Surat and New Delhi indicate that SMBs could make rooftop solar more competitive against grid tariffs, particularly for commercial and industrial sectors. However, significant barriers exist, including the lack of a statutory mandate for municipalities to promote power generation and SEBI regulations requiring a 20% equity contribution.

• India's target of 40 GW of rooftop solar by 2022 requires an estimated investment of USD 39 billion (INR 3 trillion) excluding subsidies, or USD 31.8 billion (INR 2.07 trillion) including subsidies.
• Three primary barriers hinder rooftop solar growth in India: high upfront capital expenditure, perceived performance risk, and limited access to debt capital.
• The proposed Solar Municipal Bond (SMB) model involves a municipal entity acting as a finance aggregator that raises bonds and disburses proceeds to project developers' special purpose vehicles (SPVs) through capital lease arrangements.
• Municipalities are better positioned than private developers to raise debt capital because they possess larger balance sheets and superior credit profiles; over half of the 94 rated municipalities are investment grade (BBB- or above).
• The SMB model has the potential to reduce the levelized cost of electricity (LCOE) for rooftop solar by up to 12% by providing lower-cost, longer-tenor debt.
• Case studies for Surat and New Delhi show rooftop solar potentials of 727 MW (requiring INR 38.5 billion) and 110 MW (requiring INR 6 billion) respectively.
• A critical legal barrier is that the 12th Schedule of the 74th Constitutional Amendment does not include power generation as a statutory mandate for municipal corporations.
• SEBI Regulations Section 12 (5) requires municipalities to provide a minimum equity contribution of 20% of the project cost, which is difficult for many struggling municipalities to meet.
• To attract institutional investors in India's shallow debt market, solar municipal bonds would likely need high credit ratings of AA or A+.
• Domestic institutional investors in India have an untapped debt investment potential of USD 56 billion for renewable energy that could be mobilized via municipal bonds.

APA

Trivedi, S., Ray, I., & Vulturius, G. (2018). Scaling up Rooftop Solar Power in India: The Potential of Solar Municipal Bonds. Stockholm Environment Institute. https://www.sei.org/wp-content/uploads/2018/02/scaling-up-rooftop-solar-power-in-india-the-potential-of-solar-municipal-bonds.pdf

Chicago

Trivedi, Saurabh, Indro Ray, and Gregor Vulturius. Scaling up Rooftop Solar Power in India: The Potential of Solar Municipal Bonds. Stockholm Environment Institute, 2018. https://www.sei.org/wp-content/uploads/2018/02/scaling-up-rooftop-solar-power-in-india-the-potential-of-solar-municipal-bonds.pdf.

Wikipedia

{{cite report |last1=Trivedi |first1=Saurabh |last2=Ray |first2=Indro |last3=Vulturius |first3=Gregor |title=Scaling up Rooftop Solar Power in India: The Potential of Solar Municipal Bonds |publisher=Stockholm Environment Institute |date=February 2018 |url=https://www.sei.org/wp-content/uploads/2018/02/scaling-up-rooftop-solar-power-in-india-the-potential-of-solar-municipal-bonds.pdf |access-date=23 October 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{trivedi2018scaling, author = {Trivedi, Saurabh and Ray, Indro and Vulturius, Gregor}, title = {{Scaling up Rooftop Solar Power in India: The Potential of Solar Municipal Bonds}}, institution = {Stockholm Environment Institute}, year = {2018}, month = feb, url = {https://www.sei.org/wp-content/uploads/2018/02/scaling-up-rooftop-solar-power-in-india-the-potential-of-solar-municipal-bonds.pdf}, urldate = {2026-10-23}, note = {Indexed by Climate Insights Directory} }