European Union (EU) countries and Switzerland are implementing core climate policies for promoting energy transition towards decarbonized energy systems and climate neutrality. Alignment of policies and low-carbon infrastructures between EU countries and Switzerland are crucial to support the Swiss energy system’s transition, to boost the effectiveness of its transformation, and to alleviate concerns about potential distortions of competition. POLIZERO addresses the topic of efficient policies for promoting energy transition towards a decarbonised Swiss energy system. POLIZERO evaluates a comprehensive inventory of policy measures in Switzerland and other EU countries, across all sectors of the energy system to identify robust policies…