Comparison of Performance-Assessment Methods for Residential PV Battery Systems

Niedermeyer, F.; Braun, Martin

doi:10.3390/en13215529

Cited by 3 publications

(1 citation statement)

References 16 publications

(19 reference statements)

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“…The most cost-effective solution for residential rooftop PV systems is a direct connection to the power grid. The use of batteries for energy storage is expensive due to the still high cost of the batteries themselves [25,[31][32][33]. The payback period of systems with batteries is even twice as high as those connected to the grid.…”

Section: System Costs and Government Support Programs For The Develop...mentioning

confidence: 99%

Factors Determining the Development of Prosumer Photovoltaic Installations in Poland

2022

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The development of energy production from renewable sources includes the production of energy from photovoltaic installations by prosumers. In Europe, RES development is driven by political goals and requires subsidies during the deployment period, at least as long as the cost of renewable electricity does not reaches grid parity. The study attempts to determine the importance of factors in the development of energy production by prosumers from PV installations in Polish regions. In 2019, the ‘Moj Prad’ program was introduced, applying subsidies to investment costs and the settlement of energy production in the net-metering system. Almost 900 thousand prosumer PV installations were built by the end of 2021, with a total capacity of 5.9 GW. Solar energy share grew from 0.1 to 2.1%. Spatial econometrics models were use in research to determine factors of prosumer PV systems development in Poland (at NUTS-2). Spatial regimes were found in the studied regions, as indicated by a positive autocorrelation (0.75). Considering the pseudo-R-square co-efficient, we can conclude that the spatial error, i.e., factors not included in the GNS model, constitutes approximately 10%. The economic variables included in the Mansky model, i.e., level of salaries and GDP, explain 90% of the variability of installed PV capacity (Nagelkerke pseudo-R-squared value is 0.906). The level of development of prosumer photovoltaic installations (in W per capita) in regions depends primarily on economic factors represented by the level of salaries in a given region. With the increase in salaries by one unit, we also have an increase in installed power capacity in watts per person by 3.52. Surprisingly, the region’s overall wealth did not matter, as the relative number of installations in regions with lower GDP was higher than in others. One can explain that the individual income of households is more important for increasing the number of prosumer installations than the income of the regional economy. The increase in the number of installations in one region contributed to the subsequent increase in their number in neighboring regions.

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Section: System Costs and Government Support Programs For The Develop...mentioning

confidence: 99%

Factors Determining the Development of Prosumer Photovoltaic Installations in Poland

2022

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Efficiency characterization of 26 residential photovoltaic battery storage systems

Orth¹,

Munzke²,

Weniger³

et al. 2023

Journal of Energy Storage

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Analysis of Financial Losses and Methods of Shutdowns Prevention of Photovoltaic Installations Caused by the Power Grid Failure in Poland

Hanzel

2024

Energies

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Shutdowns of photovoltaic installations are a problem that has been increasingly affecting private investors who have built home installations of several to a dozen kWp over the last few years. This problem, most often caused by outdated infrastructure, appears in many countries and impacts energy production. This work focuses on three aspects of the problem. The first one answers the question of how shutdowns of the photovoltaic installation affect production, and how significant the energy loss happens when the PV inverter is not working or is in the restart phase. The second aspect proposes an original, low-cost method that reduces the number of shutdowns. This method relates to the auto-consumption mechanism associated with domestic water heaters and the system for measuring voltage and energy consumption from the electrical network. The solution is based on constant monitoring of the network voltage and the switching of heaters based on a dedicated algorithm. Additionally, continuous analysis also allows for reporting observed irregularities to the electricity supplier. The third and final factor corresponds to the real impact of shutdowns on the long-term aspect of the investment and the extension of its payback period, and to what extent the proposed solution shortens this period. Through a detailed analysis on the issue of shutdowns, the proposed solution allows for a reduction in the number of shutdowns by over 40%. However, due to the fact that it discusses a specific case, this solution requires a calibration and adjustment process, which is discussed in the article.

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Comparison of Performance-Assessment Methods for Residential PV Battery Systems

Cited by 3 publications

References 16 publications

Factors Determining the Development of Prosumer Photovoltaic Installations in Poland

Factors Determining the Development of Prosumer Photovoltaic Installations in Poland

Efficiency characterization of 26 residential photovoltaic battery storage systems

Analysis of Financial Losses and Methods of Shutdowns Prevention of Photovoltaic Installations Caused by the Power Grid Failure in Poland

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