In Vilnius city, when there is insufficient heating capacity from independent heat producers, natural gas is utilized to address heat demand peaks. A study has been conducted to evaluate the potential feasibility of employing a thermal energy storage system charged with renewable energy as an alternative to relying on natural gas for managing heat peaks. Peak heat demand occurs during the period from November to April, correlating with outdoor temperatures falling below 0°C. The idea revolves around the Power-to-Heat (P2H)…