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Long-Term Energy Yield Analysis of the Rooftop PV System in Climate Conditions of Poland

Author

Listed:
  • Slawomir Gulkowski

    (Department of Renewable Energy Engineering, Faculty of Environmental Engineering, Lublin University of Technology, Nadbystrzycka 40B, 20-618 Lublin, Poland)

  • Ewelina Krawczak

    (Department of Renewable Energy Engineering, Faculty of Environmental Engineering, Lublin University of Technology, Nadbystrzycka 40B, 20-618 Lublin, Poland)

Abstract

In the past four years, the number of prosumers utilizing photovoltaic (PV) installations in Poland has increased significantly, exceeding 1.3 million, reaching a total power capacity of 10.5 GW by the end of 2023. This paper presents a three-year energy yield analysis of the prosumer PV systems operating in Eastern Poland. The 9.6 kW system consists of high-efficiency monocrystalline photovoltaic modules in half-cut technology. Over the three years of operation, specific yields have been analyzed along with weather parameters, such as solar intensity, outdoor temperature, humidity, wind speed, rainfall, or snowfall. The average annual final yield was found to be relatively high, exceeding 1000 kWh·kW −1 in each of the analysed years. The highest monthly specific yields of the analysed period were noticed during the summer, reaching the maximum value of 164 kWh·kW −1 in 2022. The daily final yields varied from a minimum of 0.15 kWh·kW −1 in Winter 2021 to a maximum of 6.8 kWh·kW −1 in Spring 2022. Weather conditions increasing the energy yields, such as low average ambient temperatures together with high insolation periods, were noticed. Energy production in such favorable conditions reached a surprisingly high value of energy yield in April 2020, comparable to the summer months (151.0 kWh·kW −1 ). The occurrence of heavy rainfall in summer was also noted as a desirable effect that leads to the natural cleaning of the PV modules. The average performance ratio during the analyzed period was found to be 0.85. The energy production of the PV system allowed the reduction of about 21 tons of CO 2 emission.

Suggested Citation

  • Slawomir Gulkowski & Ewelina Krawczak, 2024. "Long-Term Energy Yield Analysis of the Rooftop PV System in Climate Conditions of Poland," Sustainability, MDPI, vol. 16(8), pages 1-13, April.
    • Handle: RePEc:gam:jsusta:v:16:y:2024:i:8:p:3348-:d:1377016
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    References listed on IDEAS

    as
    1. Ewelina Krawczak, 2023. "A Comparative Analysis of Measured and Simulated Data of PV Rooftop Installations Located in Poland," Energies, MDPI, vol. 16(16), pages 1-17, August.
    2. Mariusz T. Sarniak, 2020. "Researches of the Impact of the Nominal Power Ratio and Environmental Conditions on the Efficiency of the Photovoltaic System: A Case Study for Poland in Central Europe," Sustainability, MDPI, vol. 12(15), pages 1-15, July.
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