The article will compare billing systems for electricity generation from renewable energy sources – net-metering and net-billing. Due to the April 2022 amendment of the renewable energy legislation, which significantly affected the electricity market, the discussion of this issue is of particular significance. At present, the situation of prosumers, i.e., entities that produce electricity using micro-installations and account for surplus electricity, is diversified. The article will also present the importance and significance of renewable energy sources in the context of climate goals and the pursuit of a low-emission economy. The aim of the article is to conduct a comparative analysis of the new net-billing system with the system of discounts, i.e., net-metering, with particular consideration of the goals of the introduced changes, as well as to indicate conclusions in this regard de lege lata and de lege ferenda, which can be helpful in future legislative processes.