A Power Purchase Agreement (PPA) is a contract between an electricity generator and a buyer, at a predetermined price. This article explores key elements and types of PPA. PPAs offer benefits like increased renewable energy capacity, flexible business arrangements, and a link to other carbon reduction strategies. 

Solar photovoltaic (PV) systems are a promising renewable energy source, and have seen significant increases in efficiency and decreases in cost. This article explores different types of solar PV systems, including land-based installations (rooftop, ground-mounted, and agrivoltaic) and water-based installations (floating and submerged). Each type has unique advantages and challenges, contributing to the growing diversity of solar PV technology in the renewable energy landscape.