Public–Private Partnerships (PPP) are common schemes in the infrastructure industry in developed countries but even more in developing countries given the economic and demographic growth and thus increasing need for new infrastructure. There are PPPs in the telecommunication sector, transport sector, and health and social sector with the construction of schools and jails but also in the energy sector. The idea is that both public and private entities bring what each party has best to offer in terms of capital, know-how, expertise to serve a cooperation whose main objective is to competitively build new or improve existing infrastructure. In the renewable energy sector, we see a reduction in the number of purely PPP schemes such as Built-Own-Operate-Transfer (BOOT), but they are still adopted in many jurisdictions, especially the ones starting to promote renewable energy. PPPs offer many advantages such as lower capital risk, higher efficiency and long-term monitoring, and capital-intensive investments without affecting the national fiscal budget. However, their implementation requires specially qualified teams both in the private and public sector, clear investments plans (due to high transactions costs, only projects with high value for money can be realized) to be shown to possible promoters and investors, compliance with ethical rules, transparency and the involvement of all stakeholders up to the citizen who is expected to benefit from the competitiveness and reliability of the offered public services.