For selected photovoltaic installations generating 3 and 10 kW power, operating in the on-grid system, the amount of electric power that can be generated has been calculated. Next, business analysis has been conducted based on static and dynamic methods, such as: SPBT, PBP, NPV, IRR and CCE. Calculations were made for three options: i.e. the system investment costs are born in their entirety by the investor, or the installation is purchased in the framework of the ‚Prosument’ programme run by the National Fund for Environment Protection and Water Management. As a result of the calculations made it has been found that despite support instruments and attractive purchase prices of the energy generated, the electric power generation is not profitable with the current level of investment expenditure for the construction of such an installation if we take into considerations the running and depreciation costs. Taking advantage of the 40% investment co-financing in the 10kW ‚Prosumer’ programme will enable only to minimise losses.
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