Risk allocation and contract models in renewable energy PPPs: A comparative study

The global energy sector is undergoing a profound transformation, driven by the urgency to mitigate climate change, diversify supply, and reduce fossil fuel dependence. Renewable energy (RE) technologies such as solar, wind, hydro, and biomass have shifted from peripheral options to mainstream contributors, yet the scale of investment required far exceeds government fiscal capacity. Mobilizing private capital and expertise has therefore become essential, with Public-Private Partnerships (PPPs) serving as a key mechanism to structure renewable energy projects. The success of PPPs, however, depends critically on how risks are allocated between public and private actors. Risks in renewable energy PPPs are multidimensional, encompassing land acquisition, regulatory volatility, technology failure, construction delays, demand shortfalls, and currency fluctuations. Poor allocation often leads to cost overruns, disputes, or project failure, undermining investor confidence and threatening national transition goals. This paper critically examines risk allocation and contract models in renewable energy PPPs through comparative case studies from India, Australia, and Africa. India’s solar parks highlight tariff and land challenges, while Australia’s renewable energy zones underscore the complexities of transmission PPPs. In Africa, Kenya’s Lake Turkana Wind Project and South Africa’s Renewable Energy Independent Power Producer Procurement Programme (REIPPPP) illustrate the role of donor backing, sovereign guarantees, and transparent procurement in mitigating risks. The study evaluates PPP contract models, BOT, BOOT, DBFO, and FIDIC-based EPC demonstrating their implications for financing, risk-sharing, and sustainability. It proposes a structured risk allocation framework that assigns risks to the party best able to manage them, supported by matrices and contract selection tools. By integrating global best practices, the framework enhances project bankability, reduces disputes, and improves resilience. The paper advances project management scholarship by linking contract governance with sustainable energy transitions and provides actionable guidance for policymakers, project managers, and investors.