Specific Yield Analysis of the Rooftop PV Systems Located in South-Eastern Poland

In the last few years, Poland has experienced a significant increase in photovoltaic (PV) installations. A noticeable contribution to this dynamic growth belongs prosumers. This paper presents energy efficiency analysis of nine prosumers’ PV installations located South-Eastern Poland. Eight systems are grid-connected and one is hybrid (PV with storage). New technology modules efficiencies between 19% 21%, as well various system configurations related orientation tilt, were taken into consideration. Final yields found financial assessment was presented. The average annual specific yield all analyzed be 990.2 kWh/kWp. highest ratio yearly production noted for bifacial monocrystalline silicon 20.3% (1102.9 kWh/kWp). Median maximum obtained by best insolation month (June 2021) 6.64 kWh/kWp 7.88 respectively. other ranged 868.8 1075.5 dependency on module efficiency, orientation, or tilt angle. amount produced summer half-year significantly higher (between 76% 83% depending system) than winter period. self-consumption installed company prosumers from about 50% months almost 97% winter. payback period below 8 years levelized cost electricity equal 0.14 €/kWh.