The 4th International Sustainable Energy Conference – ISEC 2026 invites researchers, industry leaders, and energy policymakers to share their latest innovations, findings, and demonstrations for a climate-neutral and inclusive energy future.

ISEC 2026 will focus on the question:
How can we achieve energy sovereignty within a time horizon dictated by climate change and defined by politics?

Global solutions such as the transformation for our economic systems towards a sustainable circular economy, the complete phase-out of fossil fuels, the implementation of sector coupling, energy storage systems, and the smart electrification of the energy supply will be central themes in presentations and discussions.

Key topics include:

• Renewable heating and cooling (low, medium, and high temperature)
• Smart energy infrastructure and sector coupling
• Excess Heat, Low-Grade Resource Recovery and Energy Storage
• Sustainable Renovation and Urban Energy Planning
• Circular economy and biorefinery
• Industrial transformation, net-zero strategies, and urban symbiosis 
• Hydrogen and solar-to-X

ISEC 2026, held in cooperation with UNIDO, places a strong emphasis on solutions tailored to the needs of the Global South and fosters collaboration across regions to ensure a just and inclusive energy transition.