Abstract
We can discuss renewable energy sources from various points of view and with orientation to the various partial problematic. The extent of the contribution no way allows approaching the problematic in its whole complexity. In spite of this we will look at one of its side, mainly trading with renewable energy sources (RES) in area of electrical engineering. Goal of the contribution is to search main factors, influencing trading with chosen RES in Slovakian energetic market with closer orientation to the market with electricity, where influencing factors present energetic legislation, system of support for electricity production from RES, price regulation, final price of electricity with tariff of system’s service.