Integration of photovoltaics into electricity networks and markets – overview of the new IEA PVPS task 19

The integration of solar photovoltaics (PV) into electricity networks and markets represents a fundamental pillar of the global energy transition. Whilst ambitious renewable deployment targets exist across numerous countries, grid capacity constraints and regulatory barriers frequently impede large-scale integration. Task 19 of the International Energy Agency's Photovoltaic Power Systems Technology Programme (IEA PVPS), launched in 2025, builds upon the extensive experience of Task 14 (2010-2023). The paper at hand describes the initially defined work programme of Task 19. The initiative aims to establish technical, economic, and regulatory foundations for PV as a major supply component in future 100% renewable-based power systems. Through nine subtasks and Joint Research Activities (JRAs), Task 19 addresses critical challenges including hosting capacity, prosumer rights and obligations, smart grid integration, commissioning processes, curtailment strategies, inverter capabilities, aggregator models, local energy management, and market design. The outcomes will provide essential guidance for policymakers, regulators, distribution system operators, and industry stakeholders in achieving resilient, digitalised, and PV-dominated power systems. This international collaboration involves 40 experts from over eighteen countries, emphasising cross-border knowledge exchange and best practice development.