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Open research questions in Photovoltaic Systems and Sustainability

61 unresolved questions extracted from the limitations and future-work sections of 320 Photovoltaic Systems and Sustainability papers in our library. Each links back to the study that raised it.

What the literature leaves open

  • The carbon mitigation and energy conservation potential of abandoned open-pit mines in China remains largely underutilized. There is a need for geographically tailored information to help decision-makers optimize the use of multifunctional land resources.

    Benefits of photovoltaic development on abandoned mines for carbon neutrality in China · 2026 · DOI

  • The study has a limited two-year study period. The study selected soil metrics that are highly sensitive to changes in management to better detect early trend signals.

    Solar energy transitions on agricultural land: soil health impacts from site construction and on-site sheep grazing · 2026 · DOI

  • There is a lack of understanding of the ecological effects of utility-scale solar development and land use. The study addresses this gap by assessing the soil health impacts of utility-scale solar development on agricultural land.

    Solar energy transitions on agricultural land: soil health impacts from site construction and on-site sheep grazing · 2026 · DOI

  • The difficulty of detecting PV installations from diverse non-PV surfaces using satellite imagery. The need to decouple the initial identification of PV sites from the precise extraction of panel footprints to improve accuracy.

    Coal plants persist as a large barrier to the global solar energy transition · 2026 · DOI

  • The lack of a global, facility-level dataset of PV facilities and energy generation and losses from clouds and aerosols. The need to investigate the impact of aerosol pollution from coal plants on solar photovoltaic energy production.

    Coal plants persist as a large barrier to the global solar energy transition · 2026 · DOI

  • The paper identifies a gap in the understanding of how to integrate photovoltaic generation with agricultural production in a way that is both technically and economically viable.

    Agrisolar - Application of photovoltaic technologies in agriculture · 2026 · DOI

  • The study identifies the challenge of competing land use for food and energy production. It also mentions the need for efficient and sustainable agricultural practices in AVS.

    Optimizing Fertilizer Use and Planting Density for Lowland Rice Production in Agrivoltaic Systems · 2026 · DOI

  • Limited applicability of floating solar systems to calm water bodies - High maintenance costs of solar panels on water bodies - Potential environmental impacts of floating solar installations

    Floating solar photovoltaics in Greece. A SWOT analysis · 2026 · DOI

  • The rising cost and unreliability of conventional irrigation energy. The contribution of diesel-powered tube wells to local air pollution. The need for a straightforward trade-off between substantially higher upfront capital cost and near-zero recurring energy expenditure in solar photovoltaic (PV) irrigation.

    EXAMINING THE ADVANTAGES: SOLAR ENERGY ADOPTION FOR IRRIGATION AS COMPARED TO DIESEL AND ELECTRICITY USAGE IN JHANG DISTRICT, PUNJAB · 2026 · DOI

  • The high cost of investment, estimated at US$ 12–20 trillion over 30 years. The technical challenges of building a transcontinental photovoltaic corridor. The strategic challenges of addressing the energy needs of Asia, Africa, and Europe.

    The Global Solar and Green Belt: Earth's Rotation as a Natural Battery for Transcontinental Renewable Energy Transmission · 2026 · DOI

  • The paper suggests that future research should focus on developing and refining the proposed heuristics for assessing the pursuitworthiness of small-scale field experiments in solar geoengineering research. The paper also suggests that future research should explore the application of these heuristics in other fields of research.

    When are small-scale field experiments in solar geoengineering worth pursuing? · 2026 · DOI

  • The paper identifies a gap in the current literature on solar geoengineering research, specifically in the evaluation of the pursuitworthiness of small-scale field experiments. The paper argues that the proposed heuristics can help address this gap.

    When are small-scale field experiments in solar geoengineering worth pursuing? · 2026 · DOI

  • High initial costs, technical complexity, and the need for supportive policies. Some crops require full sun and may not thrive under partial shading. Maintenance and operational complexity of agrivoltaics systems

    Agrivoltaics Systems in Egypt: Opportunities, Challenges, and Future Prospects · 2026 · DOI

  • The study identifies a gap in understanding the resource side of Morocco's energy equation. The gap is addressed by analyzing solar radiation and its variability across the country.

    Solar Energy Potential in Morocco · 2026 · DOI

  • Experimental validation of the proposed system. Investigation of the impact of different climatic conditions on the system's performance. Development of more advanced models to accurately represent real-world losses and efficiencies.

    Design and fabrication of an efficient solar powered desalination system for remote communities · 2026 · DOI

  • Traditional desalination methods have high operating costs, vulnerability of fuel supply, and greenhouse gas emissions. There is a need for decentralized, robust, and sustainable solutions to water supply in remote and off-grid communities.

    Design and fabrication of an efficient solar powered desalination system for remote communities · 2026 · DOI

  • Further evaluation of the alternative approach to photovoltaic procurement is needed. The effectiveness of the collaborative approach involving DOE administrators, program staff, and representatives from the industry should be assessed.

    The Federal Photovoltaics Utilization Program: An evaluation and learning framework · 1983 · DOI

  • A lack of clearly defined program objectives and expected results. A lack of specific criteria for determining which firms should receive contracts.

    The Federal Photovoltaics Utilization Program: An evaluation and learning framework · 1983 · DOI

  • The effect of solar irradiation on photovoltaic panel output characteristics is not well understood.

    Analisis Intensitas Cahaya terhadap Voc dan Isc Panel Surya · 2026 · DOI

  • Typical variations of approximately ±10% in key inputs are assumed not to meaningfully affect overall LCA outcomes, but this assumption requires empirical validation through sensitivity analysis.

    Geo-spatial prospective life cycle sustainability of InGaN and InGaP compound semiconductors · 2026 · DOI

  • Results from 2024 indicate there may be a small numerical increase in silage and grain yield on the western side of the panels, although it was not significant in this single year of data collection.

    Impacts of a Vertical Bifacial Agrivoltaics System on Field Corn in Northern Colorado, USA · 2026 · DOI

  • The NDVI plant health sensor monitoring system is integrated to detect crop stress and guide irrigation decisions, but the paper does not establish the temporal resolution (hourly, daily, weekly measurements) required to detect early stress symptoms in paddy crops, nor does it validate NDVI-based irrigation triggers against conventional or manual irrigation scheduling methods in agrivoltaic environments.

    Agrivoltaic System Designing for Sustainability and Smart Irrigation · 2026 · DOI

  • The smart irrigation system's reliance on solar panels to power irrigation pumps and control units is described conceptually, but lacks analysis of battery storage capacity, solar irradiance variability, peak water demand timing, and system performance during cloudy periods or monsoon seasons when solar generation may be insufficient for continuous pump operation in paddy fields.

    Agrivoltaic System Designing for Sustainability and Smart Irrigation · 2026 · DOI

  • There is a lack of information on suitable cereal cropping practices for the AVS. The study aims to address this gap by investigating the effects of fertilizer rate and planting density on lowland rice in the AVS.

    Optimizing Fertilizer Use and Planting Density for Lowland Rice Production in Agrivoltaic Systems · 2026 · DOI

  • Future research should focus on developing more comprehensive and integrated models that consider the economic, social, and environmental implications of circular economy strategies. Future research should explore the application of the study's methodology to other renewable energy technologies.

    Dynamic and probabilistic material flow analysis for circular economy strategies in the photovoltaic sector · 2026 · DOI

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61 open questions have been extracted from the limitations and future-work passages of 320 Photovoltaic Systems and Sustainability papers in our library. Each one below links back to the study that raised it, so you can read the original claim in context.

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