As of the end of 2020, Tamil Nadu has an installed solar PV capacity of over 4 GW. However, distributed solar PV makes a disproportionately small contribution in this: less than 20%. This report outlines the current state of distributed solar energy in the State. It identifies and elaborates on the challenges for distributed solar energy in relation to: i) policy and regulations, ii) operational challenges, iii) solar PV financing, iv) skill development, and v) grid integration of solar energy. We explore a roadmap to 2025 consisting of a set of measures – foundational and advanced – for the utility and policy makers to accelerate the transition to a distributed solar energy future.