European Energy Regulators are national authorities responsible for overseeing energy markets within their respective countries in the European Union. Their main role is to ensure that energy supply is secure, affordable, and environmentally sustainable. They work to promote competition and protect consumer rights in the energy sector. These regulators collaborate through the Agency for the Cooperation of Energy Regulators (ACER) to harmonize regulations across Europe. This cooperation helps to create a more integrated and efficient energy market, facilitating cross-border energy trade and enhancing energy security for all member states.