A BrightRoof analysis examining the financing conditions, investment considerations and municipal constraints affecting rooftop solar photovoltaic projects on public buildings in Greece.
INZEB presents the report “Analysis of financial bottlenecks with focus on the national legislative and financial frameworks regarding rooftop solar”. Prepared under BrightRoof and reviewed by WWF Greece, the publication examines the financial obstacles Greek local authorities face when planning and implementing photovoltaic systems on public buildings. It complements the project’s permitting analysis by bringing investment and financing dimensions into the assessment of municipal rooftop solar deployment.
The report considers financing within the wider conditions under which municipalities operate. It identifies limited liquidity, restricted own resources and competing expenditure needs as obstacles to covering the initial investment required for solar projects. The analysis therefore looks beyond the potential for future energy savings to examine the resources, preparation and institutional arrangements needed to initiate an investment.
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Understanding the investment requirements
A dedicated chapter examines photovoltaic technologies and associated investment considerations relevant to Greece. It compares different panel technologies and discusses performance characteristics, durability and the implications of operating conditions such as high temperatures, coastal exposure and wind. It also considers indicative investment costs for different system sizes and the additional expenditure associated with battery storage.
This technical dimension is included because the financing discussion depends on what is being financed. System capacity, technology choice, and the inclusion of storage affect the initial investment and a project’s configuration. The report brings these considerations into the same discussion as funding sources and municipal constraints, rather than treating technology selection and financial planning as separate exercises.
The institutional section also examines the relationship between rooftop solar, self-consumption arrangements and public-building energy planning. It considers the place of photovoltaic investment within broader building renovation and municipal emissions-reduction planning, providing context for how local authorities identify and prepare potential projects.
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Financing mechanisms and municipal constraints
The financing chapter reviews national and European funding channels discussed in the report, including the Recovery and Resilience Fund, the National Strategic Reference Framework and regional programmes. It also examines the role of the Consignment Deposits and Loans Fund. It considers examples such as the ELECTRA programme in relation to wider public-building energy upgrades and the conditions under which renewable energy installations are incorporated into such investments.
Alongside these mechanisms, the report identifies difficulties in preparing projects for financing. These include shortages of specialised staff and limited capacity to develop the studies and documentation needed for funding applications. It also discusses financing constraints affecting contractors involved in municipal energy projects, including concerns about payment delays. The analysis treats these issues as part of the investment process, not simply as questions of whether a funding programme exists.
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Citizen participation in the financing discussion
The report includes a chapter on citizen engagement and energy communities. It uses Greek examples to examine how municipalities and residents participate in shared renewable energy projects. The chapter distinguishes the broader experience of municipal energy communities, which often involves ground-mounted photovoltaic generation, from the more specific challenge of developing solar installations on public-building rooftops.
European examples extend this discussion to arrangements for community access to municipal rooftops and citizen investment. The publication considers the Valencia experience concerning municipal rooftop use and the Križevci example of crowd investment in a photovoltaic installation on a municipal building. These cases raise questions about participation, access to public assets, and how community members organise contributions.
For municipal finance departments, technical services, energy agencies, and organisations working on community energy, the report provides an overview of the issues to consider when evaluating public-building solar investment. It connects technology and investment requirements with municipal resources, project preparation, and participation arrangements.
Together with the permitting analysis and the European best practices collection, it forms part of BrightRoof‘s analytical work on the conditions affecting rooftop solar deployment in Greece and Bulgaria. The findings provide material for further consultation and the project’s subsequent development of recommendations.
Funding acknowledgement and disclaimer
This project is part of the European Climate Initiative (EUKI) of the German Federal Ministry for the Environment, Climate Action, Nature Conservation and Nuclear Safety (BMUKN). The opinions put forward in this publication are the sole responsibility of the author(s) and do not necessarily reflect the views of the German Federal Ministry for the Environment, Climate Action, Nature Conservation and Nuclear Safety (BMUKN).
