[en] This publication proposes an assessment of variation ranges of the average complete cost of production of a MWh (also called Levelized Cost of Energy or LCOE) for renewable sectors producing electric power and/or heat, but also for sectors related to electricity storage and to bio-methane injection. For each sector, the main objective was to calculate LCOE variation ranges for an installation put into service in France in 2018, in 2030 or in 2050. For some sectors, the study also tracked LCOE evolutions between 2008 and 2018, and compared the LCOE in France in 2018 with that of some other countries (when data were available). Sectors are herein associated with the energy source: photovoltaic (residential, middle sized roofs, large roofs, ground-based plants), wind (onshore, offshore), hydroelectricity, domestic heat (wood, thermal solar, domestic heat pumps), collective industrial or agricultural heat (thermal solar, biomass, surface geothermal, deep geothermal, fatal heat recovery), biogas (co-generation, injection), and storage (batteries, hydrogen). After a synthesis of results, the report presents the adopted methodology, assessments of electric power production costs for the different sectors, assessments of heat domestic production costs, assessments of collective and industrial heat production costs, the case of biogas and of electricity storage, and an assessment of production costs of solar technologies in non interconnected areas