Switzerland like many countries plans to undertake an energy transition and the government proposes different paths for 2035 and 2050 to achieve it. However the authors of this paper felt the need for a better information of the public on the energy matters. A special web-based information platform was introduced in 2015. The platform includes a calculator, a book providing 100 questions and answers on energy and a MOOC for citizens with more than 20 short lectures on the various aspects of the Swiss energy transition. Unlike other interactive energy scenario calculators our calculator offers the possibility to show monthly averages of demand and supply, highlighting the strong seasonal patterns occurring when considering most countries from the central to the northern parts of Europe. The calculator indicates the effects of the user’s choices on 6 main indicators (final energy, electricity balance, % of renewables, CO2 emissions, long term wastes and costs) While the underlying model has already been published, this paper intends to discuss the reactions following the introduction of such a platform. Reactions from minority, but very active groups, including climate change deniers, ultra-pronuclear and anti-wind power opponents have been noticed and highlight the very emotional nature of the topic. Scenarios for 2050 are presented and discussed as well as examples of a new scenario that can be made using the calculator. All main parameters such a socioeconomic, heating and cogeneration technologies, transportation, electricity generation can be adapted.