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<article xmlns:xlink="http://www.w3.org/1999/xlink">
  <front>
    <journal-meta />
    <article-meta>
      <title-group>
        <article-title>Data-driven Artificial Intelligence Techniques for Enhancing Solar Photovoltaic System Performance: A Systematic Review</article-title>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <string-name>Leonardo Alves Messias</string-name>
          <email>Leonardoalves.eng@hotmail.com</email>
          <xref ref-type="aff" rid="aff0">0</xref>
        </contrib>
        <contrib contrib-type="author">
          <string-name>José Luis Domingos</string-name>
          <email>jose.domingos@ifg.edu.br</email>
          <xref ref-type="aff" rid="aff0">0</xref>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Thiago Augusto Mendes</string-name>
          <xref ref-type="aff" rid="aff0">0</xref>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Saymon Fonseca Santos Mendes</string-name>
          <xref ref-type="aff" rid="aff1">1</xref>
          <xref ref-type="aff" rid="aff2">2</xref>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Raphael de Aquino Gomes</string-name>
          <email>raphael.gomes@ifg.edu.br</email>
          <xref ref-type="aff" rid="aff0">0</xref>
        </contrib>
        <aff id="aff0">
          <label>0</label>
          <institution>Instituto Federal de Goiás</institution>
          ,
          <addr-line>Goiânia</addr-line>
          ,
          <country country="BR">Brazil</country>
        </aff>
        <aff id="aff1">
          <label>1</label>
          <institution>Secretaria-Geral de Governo de Goiás</institution>
          ,
          <addr-line>Goiânia</addr-line>
          ,
          <country country="BR">Brazil</country>
        </aff>
        <aff id="aff2">
          <label>2</label>
          <institution>Universidade Federal de Goiás</institution>
          ,
          <addr-line>Goiânia</addr-line>
          ,
          <country country="BR">Brazil</country>
        </aff>
      </contrib-group>
      <fpage>32</fpage>
      <lpage>44</lpage>
      <abstract>
        <p>Solar energy is increasingly recognized as a clean and renewable power source. In this context, artificial intelligence (AI) techniques have emerged as efective tools for enhancing the eficiency, reliability, and management of photovoltaic (PV) systems. This article presents a systematic review of recent literature on AI applications in solar PV, focusing on data-driven methods for energy production forecasting, fault detection, and system monitoring and control. The reviewed studies span multiple countries and employ diverse datasets, prediction horizons, and parameters to train AI models. By summarizing the state-of-the-art approaches, this review highlights how AI can optimize performance, improve reliability, and support the scalability of solar energy solutions, ultimately contributing to more sustainable and cost-efective energy systems.</p>
      </abstract>
      <kwd-group>
        <kwd>eol&gt;Energy Eficiency</kwd>
        <kwd>Photovoltaic Energy Generation</kwd>
        <kwd>Artificial intelligence</kwd>
        <kwd>Solar Energy Forecasting</kwd>
      </kwd-group>
    </article-meta>
  </front>
  <body>
    <sec id="sec-1">
      <title>1. Introduction</title>
      <p>
        The growing concern for environmental preservation has intensified the search for renewable energy
sources, among which photovoltaic (PV) energy stands out as a notable option. Solar energy is recognized
as one of the most promising clean and renewable alternatives, with significant potential to reduce
greenhouse gas emissions [
        <xref ref-type="bibr" rid="ref1">1</xref>
        ].
      </p>
      <p>
        According to [
        <xref ref-type="bibr" rid="ref2">2</xref>
        ], Brazil benefits from a privileged geographic location that provides exceptional
potential for solar power generation. The lowest solar radiation index recorded in the country is
approximately 1,500 kWh/m² per year, on the northern coast of Santa Catarina. At the same time, the
highest reaches 2,350 kWh/m² in the northern region of Bahia. These values are notably higher than
the annual averages in countries with consolidated solar energy markets, such as Germany (900–1,250
kWh/m²) and Spain (1,200–1,950 kWh/m²), highlighting Brazil’s strong comparative advantage in this
sector.
      </p>
      <p>Public policies have played a crucial role in promoting the expansion of solar energy in Brazil.
Tax incentives and subsidy programs have been key drivers of the sector’s growth; however, further
improvements are still needed to enhance economic feasibility and competitiveness.</p>
      <p>
        From January to August 2023, Brazil’s installed electricity capacity increased by 7.0 Gigawatts (GW),
of which 6.2 GW came from solar and wind sources. This period marked the most significant recorded
growth in solar generation, with renewable sources now accounting for 83.79% of the national energy
matrix, consolidating Brazil as a global leader in clean energy production. Solar power alone contributed
3.0 GW to the National Interconnected System (SIN) [
        <xref ref-type="bibr" rid="ref3">3</xref>
        ].
      </p>
      <p>
        In this context, Artificial Intelligence (AI) techniques have been increasingly applied to improve
both the eficiency and reliability of PV systems. As research advances, significant progress has been
made in methodologies and approaches, resulting in notable improvements in forecasting, control,
and fault diagnosis. Andrade et al. (2021) presented two Machine Learning (ML) tools capable of
achieving up to 90% accuracy in PV generation forecasting, although at a high computational cost. Such
techniques have broad applicability, including power output prediction, solar irradiance estimation,
water heating, eficient PV system sizing, Maximum Power Point Tracking (MPPT) optimization, and
fault detection [
        <xref ref-type="bibr" rid="ref4">4</xref>
        ].
      </p>
      <p>
        The literature review identifies two primary approaches for analyzing PV systems. The first involves
visual methods, which require specific equipment, such as thermal imaging cameras, and specialized
labor for techniques like electroluminescence and UV fluorescence. These are used to detect issues
such as dirt accumulation, hotspots, degradation, and cell breakage [
        <xref ref-type="bibr" rid="ref5">5</xref>
        ]. The second approach involves
non-visual electrical methods, which are based on measurements of electrical parameters or, in some
cases, meteorological data. This approach is particularly advantageous as it enables automation and
integration into fault detection and diagnosis processes [
        <xref ref-type="bibr" rid="ref6">6</xref>
        ], while leveraging sensors already installed
in PV facilities, such as current and voltage sensors, and solar irradiation meters.
      </p>
      <p>This study aims to conduct a systematic literature review on the application of AI methods to PV
systems using PV modules as sensors, leveraging solar radiation data and meteorological information
from stations near existing PV plants. The research is justified by the need to highlight emerging
technologies in the field, present diferent AI applications in PV systems, and assess which methods are
most eficient and accurate for solar energy generation forecasting, considering data availability and
quality. The findings will allow the identification of research gaps and key literature within the study
scope, thereby contributing to the development of a more sustainable and environmentally responsible
energy system.</p>
    </sec>
    <sec id="sec-2">
      <title>2. Methodology</title>
      <p>contributions to</p>
      <p>The study was conducted in three distinct phases. The first focused on a bibliographic survey of
fault detection in PV Plants, emphasizing methods that employ AI techniques for data analysis. The
second phase focused on forecasting solar power generation. Finally, the third phase concentrated on
identifying systems that monitor and control PV plants through AI-based techniques.</p>
      <p>
        Table 1 outlines the methodological steps adopted for selecting bibliographic sources in this review,
ensuring both the quality and relevance of the studies analyzed and following the guidelines provided
by [
        <xref ref-type="bibr" rid="ref7 ref8">7, 8</xref>
        ]. The choice of databases — SCOPUS, SciELO Citation Index, and Web of Science — reflects
their reputation for indexing peer-reviewed, high-impact publications across diverse fields, including
renewable energy and artificial intelligence. The search string was carefully designed to capture a
comprehensive set of studies at the intersection of photovoltaic systems and AI, incorporating multiple
synonyms and related terms to minimize the risk of omitting relevant research. The filters applied,
covering the period from 2017 to 2024 and focusing on titles, abstracts, and keywords, ensured that
only recent and directly relevant contributions were included.
      </p>
      <p>The inclusion criteria prioritize works that integrate AI techniques into photovoltaic systems, present
quantitative performance metrics, and address at least one of the three focal areas of this review:
generation forecasting, fault detection, or monitoring and control. Notably, only studies with full-text
access that lacked a direct connection were excluded, guaranteeing that the analysis could be conducted
with complete methodological and results information.</p>
      <p>The exclusion criteria were established to maintain thematic and methodological coherence. Studies
relying solely on thermal or photographic image analysis without AI integration were excluded, as
were works focused on other renewable energy sources that lacked a direct connection to solar energy.</p>
      <sec id="sec-2-1">
        <title>SCOPUS (Elsevier), SciELO Citation Index (Web of Science), Web of Science - Main</title>
        <p>collection (Clarivate Analytics)
(“PHOTOVOLTAIC” OR “DISTRIBUTED GENERATION” OR “SOLAR POWER
GENERA</p>
      </sec>
      <sec id="sec-2-2">
        <title>TION”) AND (“ARTIFICIAL INTELLIGENCE” OR “MACHINE LEARNING” OR “DEEP</title>
      </sec>
      <sec id="sec-2-3">
        <title>LEARNING” OR “DATA ANALYSIS”) AND (“FORECASTING” OR “PREDICTION”) AND (“MAINTENANCE” OR “FAULT DETECTION”) Period: 2017 to 2024, Fields: title, abstract, keywords</title>
        <p>• Papers that apply AI techniques to photovoltaic systems.
• Studies that present quantitative performance data (e.g., RMSE, MAE, AUC,
accuracy).
• Papers that address generation forecasting, fault detection, or monitoring and
control.
• Full text available.
• Papers that exclusively address thermal or photographic image analysis without</p>
      </sec>
      <sec id="sec-2-4">
        <title>AI integration.</title>
        <p>• Studies applied to other renewable sources not directly related to solar.
• Duplicate publications in databases.</p>
        <p>• Non-peer-reviewed documents (e.g., technical reports, white papers).</p>
        <p>Duplicate publications were removed to avoid redundancy, and non-peer-reviewed documents were
excluded to ensure scientific rigor. These choices collectively aim to build a robust, reliable, and focused
dataset, enhancing the validity of the conclusions drawn from the literature review.</p>
        <p>The selection of research databases is essential to ensure the quality and comprehensiveness of the
results. The journals and indexing services used in this study were selected for their recognition as
reputable references in the research field. Scopus, Web of Science, and SciELO Citation Index were
selected due to their extensive coverage of peer-reviewed journals, books, and conference proceedings,
as well as their relevance in providing high-impact publications.</p>
        <p>Following the selection steps described earlier, a total of 202 articles with potential for inclusion
were initially identified. However, several studies did not align with the specific objective of this article
— for instance, research focused on thermographic and image analysis, electric vehicles, and smart
cities. To refine the selection, an initial screening of titles and abstracts was conducted, resulting in the
inclusion of 15 articles. Figure 2 presents the flowchart of the article selection process, summarizing the
systematic filtering steps that led to the final set of studies included in this review. The identification
phase began with 202 records retrieved from three major databases — SCOPUS (108), Web of Science
Main Collection (85), and SciELO Citation Index (9). The first exclusion stage removed 87 papers due to
duplication, being review articles, or lacking full-text availability, leaving 52 eligible studies.</p>
        <p>In the eligibility phase, an initial screening based on titles and abstracts resulted in 31 papers; however,
18 of these were excluded because they focused exclusively on thermal or photographic image analysis
without AI integration, which did not align with the study’s scope. The remaining 15 articles were
then assessed against the thematic criteria of the review, ensuring they addressed at least one of the
three focal areas — solar generation prediction, fault detection in photovoltaic plants, or solar plant
monitoring and control. No further exclusions were needed at this stage, and all 15 papers were included
in the final review.</p>
        <p>This process demonstrates a rigorous application of inclusion and exclusion criteria, ensuring that
the final dataset is both methodologically sound and thematically aligned with the research objectives.</p>
        <p>It also highlights that a substantial number of initially retrieved papers did not directly fit the scope,
underscoring the importance of a structured selection approach in systematic literature reviews.</p>
      </sec>
    </sec>
    <sec id="sec-3">
      <title>3. Discussion</title>
      <p>In the context of technological advancements aimed at optimizing solar energy, the techniques described
above play a crucial role in enhancing the eficiency of this renewable energy source. The application of
these methodologies — in fault detection for PV plants, solar generation forecasting, and the monitoring
and control of solar facilities — creates numerous opportunities for the solar energy market.</p>
      <p>The significance of these techniques lies not only in optimizing technical aspects but also in enabling
the economic and environmental feasibility of solar power, thereby consolidating it as a cornerstone for
a sustainable future.</p>
      <p>Figure 2 illustrates the distribution of the selected articles between 2019 and 2023, showing a peak in
publications in 2020, followed by a moderate decline in subsequent years. The highest number of articles
was recorded in 2020 (five publications), which may reflect a period of intensified research activity in
AI applications for photovoltaic systems. While there is a recovery in 2022, with four publications, 2023
shows a slight decrease. It is noteworthy that no works are included for 2024, which is likely due to the
exclusion criterion adopted in this review — only studies with full-text availability were considered.
This criterion may have limited the inclusion of the most recent research, as many publications from
2024 might not yet have been fully accessible at the time of data collection.</p>
      <p>The collaboration network shown in Figure 3 provides a visual representation of the research
relationships among the authors whose studies were analyzed in this review. Each node represents
an individual researcher, and the edges between nodes indicate co-authorship ties, with the numerical
labels on the edges representing the number of joint publications within the corpus under review.
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linked Kthrareomuegrh strong collaborationSteideasi, suggesting a shared reseLairch trajectory, potentially Lciemntered
on enhanced ensemble learning methods for grid-connected systems. Other pairs, such as Wang with
colleagues in the KNN-based fault warning domain, and Basnet with Chun in the probabilistic neural
network (PNN) approac2h, show targeted but less extensive collaborations. 1</p>
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feature engineering for stacked machine learning models, or explainable AI (XAI) approaches. Their
lower number of shared3 works suggests they may 1be working within smaller,1 specialized research
groupsCourbuokncuisolated projects that nKaopnuectuheless contribute significWanantgly to the knowledge baseS.han</p>
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fault detection vs. forecasting vs. mHosinanitgoring), geographical sepFeanrgation of institutions, or tKhuezluuse of</p>
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      <p>From a research development perspective, this fragmentation highlights opportunities for fostering
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      <p>Hsiang — whose links reflect fewer but still relevant co-authorships. These individuals are often
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associfaeatetudre engineering for stacked machine learning models, or explainablCe NANI(-XLASTI) Mappfororeaccahsetsi.nTgheir
with distinct methodological contributions, such as hybrid models,
feature engineering for stacked machine learning models, or explainable AI (XAI) approaches. Their
lower number of shared works suggests they may be working within smaller, specialized research
groups or on isolated projects that nonetheless contribute significantly to the knowledge base.</p>
      <p>36</p>
      <p>Notably, the network structure reveals moderate fragmentation, with limited interconnections
between clusters. This indicates that while strong bonds exist within certain teams, cross-pollination of
lower number of shared works suggests they may be working within smaller, specialized research
groups or on isolated projects that nonetheless contribute significantly to the knowledge base.</p>
      <p>Notably, the network structure reveals moderate fragmentation, with limited interconnections
between clusters. This feature indicates that while strong bonds exist within specific teams,
crosspollination of ideas between groups is less frequent. Such a pattern may result from diferences in
research focus (e.g., fault detection vs. forecasting vs. monitoring), geographical separation of
institutions, or the use of diferent datasets and experimental conditions.</p>
      <p>From a research development perspective, this fragmentation highlights opportunities for fostering
broader interdisciplinary collaboration. Integrating the expertise of tightly knit groups could lead to the
creation of more comprehensive AI frameworks capable of addressing multiple aspects of PV system
optimization simultaneously — from early fault detection to predictive maintenance, performance
forecasting, and integrated control systems. Enhanced cooperation across these clusters could also
accelerate standardization of datasets, promote reproducibility, and encourage the development of hybrid
methodologies that combine the strengths of diferent AI techniques. In the context of global challenges
in renewable energy integration, such expanded collaboration has the potential to significantly advance
the field and contribute to more eficient, reliable, and sustainable solar energy solutions.</p>
      <sec id="sec-3-1">
        <title>3.1. Fault Detection in PV Plants</title>
        <p>This research highlights the application of Artificial Intelligence (AI) as a promising tool for diagnosing
a wide range of faults in PV systems. AI’s ability to learn and process large volumes of data has proven
to be particularly efective. The studies we’ve analyzed consistently report high accuracy rates in fault
detection, instilling confidence in the efectiveness of these advanced methods to enhance the reliability
and eficiency of PV systems.</p>
        <p>Table 2 presents studies that explore AI techniques for fault diagnosis in PV systems. We will provide
detailed information about each study, including the databases used, types of input data, historical time
series length, study locations, data formats, and the results obtained through AI performance evaluation
metrics. This will ensure that you, as our audience, are fully informed and knowledgeable about the
research.</p>
        <p>
          Kapucu and Cubukcu [
          <xref ref-type="bibr" rid="ref9">9</xref>
          ] presented a system installed in a residential building in Muğla, Turkey,
that collects electrical data on voltage, current, power, and irradiance from PV modules, in addition to
climatic data. The setup employed Arduino™ Mega R3 and ESP8266 microcontrollers to transmit data
to the cloud. The measured variables included global and tilted global radiation (in W/m²), temperature,
and humidity, all of which were stored at 30-second intervals. The specific data collection period was not
reported. The approach applied 10-fold cross-validation, achieving an accuracy of 0.9767. The authors
concluded that the technique could be used to identify defective PV systems, with its cloud-based
implementation enabling real-time diagnostics and email notifications, thereby expanding its practical
applicability.
        </p>
        <p>
          In this context, Dhibi et al. [
          <xref ref-type="bibr" rid="ref10">10</xref>
          ] also applied Machine Learning (ML) methods for fault diagnosis in
grid-connected (On-Grid) PV systems. The data originated from PV system simulators, with sampling
intervals ranging from 5 to 15 seconds, although the total data collection period was not specified. The
approach analyzed system behavior under adverse conditions. Simulated faults included open-circuit
defects in one of the inverter switches, sensor-level issues indicating wiring or reading failures, grid
disconnection faults at the common coupling point, permanent partial shading between 10% and 20%,
and open-circuits or short-circuits in PV cell connections. Using a 10-fold cross-validation method, the
approach achieved 100% accuracy and precision. For comparison, Recurrent Neural Network (RNN)
methods yielded accuracies and precisions of 68.24% and 68.26%, respectively, while Probabilistic Neural
Network (PNN) methods recorded accuracies and precisions of 62.18% and 62.21%, respectively.
        </p>
        <p>
          Wang et al. [
          <xref ref-type="bibr" rid="ref11">11</xref>
          ] introduced an approach for early fault warning using the K-Nearest Neighbors
(KNN) technique. In a study conducted on the operation of a PV plant in China, the analyzed parameters
included direct current (DC) input flow, total DC input power, three-phase grid currents and voltages,
frequency, total energy generation, and CO2 emissions. Measurement intervals ranged from 5 to 30
minutes. The study also examined the impact of weather conditions on energy production, categorizing
the data into sunny, cloudy, and rainy days. The technique demonstrated promising capability in
classifying fault severity levels as usual, mild, and severe. The Receiver Operating Characteristic (ROC)
curve yielded an Area Under the Curve (AUC) value of 0.81, a metric summarizing model efectiveness
on a scale from 0 to 1, where 1 represents a perfect model.
        </p>
        <p>
          Basnet, Chun, and Bang [
          <xref ref-type="bibr" rid="ref12">12</xref>
          ] developed a PNN-based model for analyzing data collected from a 1.8
kWp On-Grid PV plant located at Jeonbuk National University in Jeonju, South Korea. The dataset
included current, voltage, irradiation levels, and temperature from sensors integrated into the PV array.
Trained on data gathered under various environmental conditions, the model achieved 100% fault
prediction accuracy, even in challenging scenarios, and demonstrated superior predictive performance
compared to other Deep Learning (DL) classification methods.
        </p>
      </sec>
      <sec id="sec-3-2">
        <title>3.2. Solar Generation Prediction</title>
        <p>Forecasting in PV systems is essential to improve operational eficiency and maximize return on
investment, addressing aspects ranging from eficient management to the mitigation of energy losses.
The incorporation of AI into PV plants stands out for enhancing the prediction of maintenance costs and
enabling a predictive maintenance approach. Through data analysis, it is possible to conduct an in-depth
assessment of the technical and economic feasibility of PV systems, taking into account variations in
energy generation capacity according to regional specificities.</p>
        <p>Table 3 presents studies that discuss prediction systems with various purposes, indicating the datasets
used, prediction periods, AI techniques applied, validation metrics, and stated objectives.</p>
        <p>
          Kraemer et al. [
          <xref ref-type="bibr" rid="ref13">13</xref>
          ] proposed a study investigating short-term PV energy generation forecasting with
a horizon of up to 24 hours. The dataset was obtained from Sigrist et al., comprising energy records
from six distinct locations over 961 days, spanning from 2017 to 2020, which included both power
and meteorological variables. Emphasis was placed on the use of Random Forest Regression (RFR),
resulting in a Symmetric Mean Absolute Percentage Error (SMAPE) of 22.13% with a maximum of 30
days of training data, indicating a relatively low forecasting error. However, when replacing observed
irradiance data with available irradiance forecasts, the prediction error increased to 37.79%, suggesting
that most of the forecasting error could be attributed to inaccuracies in weather forecasts—specifically,
discrepancies between predicted and observed irradiance.
        </p>
        <p>
          In a complementary study, Sedai et al. [
          <xref ref-type="bibr" rid="ref14">14</xref>
          ] performed a performance analysis of multiple statistical
models for long-term solar energy forecasting. The methods utilized a set of input variables, including
the expected PV system power output, Direct Normal Irradiance (DNI), Global Horizontal Irradiance
(GHI), Difuse Horizontal Irradiance (DHI), and meteorological data such as temperature and wind
speed. The Random Forest (RF) model outperformed others, achieving a 50% improvement in accuracy
compared to univariate statistical models and a 10% improvement compared to multivariate models.
Furthermore, adding five additional input variables improved the accuracy of both ML and DL models
        </p>
        <sec id="sec-3-2-1">
          <title>IA technique</title>
        </sec>
        <sec id="sec-3-2-2">
          <title>Authors Journal RF RF</title>
        </sec>
        <sec id="sec-3-2-3">
          <title>Online Machine Learning for 1-Day-Ahead Prediction of Indoor Photovoltaic Energy [13]</title>
        </sec>
        <sec id="sec-3-2-4">
          <title>Performance Analysis of Statistical, Machine Learn</title>
          <p>
            ing, and Deep Learning Models in Long-Term
Forecasting of Solar Power Production [
            <xref ref-type="bibr" rid="ref14">14</xref>
            ]
          </p>
        </sec>
        <sec id="sec-3-2-5">
          <title>Assessing the Modelling Approach and Datasets Required for Fault Detection in Photovoltaic Systems [15]</title>
        </sec>
        <sec id="sec-3-2-6">
          <title>A Deep-Learning Based Solar Irradiance Forecast Using Missing Data [16]</title>
        </sec>
        <sec id="sec-3-2-7">
          <title>A Photovoltaic Power Prediction Approach Enhanced by Feature Engineering and Stacked Machine Learning Model [17]</title>
        </sec>
        <sec id="sec-3-2-8">
          <title>Solar Power Forecasting Using CNN-LSTM Hybrid Model [18]</title>
        </sec>
        <sec id="sec-3-2-9">
          <title>Photovoltaic Power Forecasting with a Hybrid Deep</title>
        </sec>
        <sec id="sec-3-2-10">
          <title>Learning Approach [19]</title>
        </sec>
        <sec id="sec-3-2-11">
          <title>Machine Learning Models to Quantify and Map Daily</title>
        </sec>
        <sec id="sec-3-2-12">
          <title>Global Solar Radiation and Photovoltaic Power [20]</title>
        </sec>
        <sec id="sec-3-2-13">
          <title>Gaining Insight Into Solar Photovoltaic Power Gen</title>
          <p>eration Forecasting Utilizing Explainable Artificial</p>
        </sec>
        <sec id="sec-3-2-14">
          <title>Intelligence Tools [21]</title>
          <p>by 36%.</p>
          <p>
            Bird et al. [
            <xref ref-type="bibr" rid="ref15">15</xref>
            ] used PV generation data from an extensive database covering over 100 commercial
rooftop PV installations. Collected data included irradiance, solar position, wind direction and speed,
ambient temperature, and relative humidity from four geographically distinct measurement sites. PV
power generation, measured in kWh, was recorded hourly from 2013 to 2018. The study compared the
performance of several algorithms, including Support Vector Machines (SVM), which achieved a Relative
Mean Error (RME) ranging from 3.27% to 4.81%. The RF algorithm stood out, with an RME ranging from
2.54% to 4.88%, depending on the proximity of the weather stations. The study suggests a cost-efective
approach to PV asset management, particularly when combined with nearby meteorological stations.
          </p>
          <p>
            Shan et al. [
            <xref ref-type="bibr" rid="ref16">16</xref>
            ] developed a multiple-input single-output model based on Recurrent Neural Networks
(RNN) to forecast DNI. The dataset, from the National Renewable Energy Laboratory, included DNI,
wind speed, temperature, cloud cover, and humidity. These parameters are critical for PV plant analysis,
as they allow verification of module performance against datasheet specifications. The approach
was notable for its application at 4-hour intervals, even when 40% of data was missing. The authors
emphasized that missing data posed minimal issues due to the larger training sample size, ofering a
solution for solar energy forecasting in scenarios with limited historical data availability.
          </p>
          <p>
            In Ait Abdelmoula et al. [
            <xref ref-type="bibr" rid="ref17">17</xref>
            ], the potential of AI models for power generation forecasting was
explored through a comparative evaluation of diferent techniques. Conducted in Benguerir, Morocco,
the study analyzed data including DC power, module temperature, global horizontal irradiance, global
tilted irradiance, ambient temperature, relative humidity, and wind speed, collected from October 2021
to March 2022. This period covered autumn and winter seasons, with a minimum daily threshold of 210
records, corresponding to an average of 7 generation hours per day and 30 records per hour. Among
the tested models—Support Machine (SM), RF, and XGBoost—the SM achieved the highest accuracy
(99%), efectively synthesizing the strengths of all base models.
          </p>
          <p>
            Another relevant approach involved the use of Long Short-Term Memory (LSTM) networks. Lim et
al. [
            <xref ref-type="bibr" rid="ref18">18</xref>
            ] proposed a hybrid model combining Convolutional Neural Networks (CNN) and LSTM for PV
generation forecasting. Data from a PV plant in Busan, South Korea, were collected between September
10, 2019, and July 22, 2021, including the average annual PV generation, wind speeds, and temperatures.
Weather conditions were classified into two categories: sunny and cloudy. Results showed a Root Mean
Square Error (RMSE) of 4.58 on sunny days and 7.06 on overcast days, indicating better performance
under sunny conditions. Similarly, Li et al. [
            <xref ref-type="bibr" rid="ref19">19</xref>
            ] also employed CNN-LSTM integration, utilizing output
power data from July 1 to 10. The resulting RMSE ranged from 3.206 to 33.405 in spring, 1.664 to 25.166
in summer, 1.448 to 19.806 in autumn, and 2.062 to 21.223 in winter—demonstrating greater efectiveness
than other benchmark methods.
          </p>
          <p>
            Feng et al. [
            <xref ref-type="bibr" rid="ref20">20</xref>
            ] employed a model integrating Particle Swarm Optimization (PSO) and Extreme
Learning Machine (ELM) to forecast daily solar radiation. Data were collected from seven stations on the
Loess Plateau, China, including photosynthetically active photon flux density, maximum and minimum
temperatures, atmospheric pressure, global solar radiation, and sunshine duration. Results showed that
PSO-ELM outperformed five other ML models, especially when complete, on-site meteorological data
were used as inputs, achieving the best Mean Absolute Error (MAE) of 1.649 MJm−2 day−1 .
          </p>
          <p>
            Finally, Kuzlu et al. [
            <xref ref-type="bibr" rid="ref21">21</xref>
            ] explored the use of Explainable AI (XAI) tools for PV energy generation
forecasting. Using data from the Global Energy Forecasting Competition (GEFCOM), the study analyzed
hourly PV generation and numerical weather prediction data from April 1, 2012, to July 1, 2014. The
input variables included atmospheric pressure, relative humidity, cloud cover, horizontal and vertical
wind speeds, air temperature, surface solar radiation, surface terrestrial radiation, total solar radiation
received, total precipitation, and time of day. The goal was to interpret the internal mechanisms of an
AI-based forecasting model. Results indicated an RMSE of 7.23%, demonstrating the potential of XAI
for applications in smart grids.
          </p>
        </sec>
      </sec>
      <sec id="sec-3-3">
        <title>3.3. Monitoring and Control of Solar Power Plants</title>
        <p>Monitoring solar power plants plays a central role in the eficient management of photovoltaic (PV)
systems, enabling the development of control panels and advanced management platforms that
streamline and enhance the supervision of these facilities. The implementation of such systems extends
beyond technical knowledge of the energy sector, requiring multidisciplinary expertise in information
technology, including programming, database management, and front-end and back-end development.</p>
        <p>As shown in Table 4, the analyzed systems are designed to manage multiple PV installations by
integrating and centralizing data into a single platform. This approach ofers a comprehensive view of
operational performance, supports informed strategic decision-making, and enhances both preventive
and predictive maintenance practices.</p>
        <p>
          Rao et al. [
          <xref ref-type="bibr" rid="ref22">22</xref>
          ] presented a monitoring and control system for PV solar power plants. The system
integrates machine learning algorithms and signal processing to optimize the performance of solar
panels located at the Arizona State University Research Park in the United States. It was developed
using a ZigBee microcontroller connected to a wireless network, devices, and a storage server. Through
sensors, the 104 solar panels of an 18 kW solar array testbed provide real-time information on MPPT
voltage, MPPT current, temperature, irradiance, fill factor, temperature coeficient, maximum PV module
power, open-circuit voltage, and short-circuit current, enabling fault detection and allowing changes in
the connection topology. Additionally, the system employs shading predictions based on historical data
and kernel regression techniques. The results showed an accuracy of 91.62% in training and 89.34% in
testing—significant indicators of the method’s eficiency, which benefits from in-situ data collection.
        </p>
        <p>
          The study by Hsiang et al. [
          <xref ref-type="bibr" rid="ref23">23</xref>
          ] described the development of a web platform designed to serve as
a real-time meteorological information management system and database storage solution. Data are
automatically collected from sources such as OPENDATA from the Central Weather Bureau and PV
generation data from Yeou-Ghi Industry Corp. in the Dou Liu district. The system processes variables
such as solar radiation, wind speed and direction, temperature, and humidity, which are updated every 5
to 10 minutes. It identifies the most accurate dataset for a specific location and applies the most suitable
weather forecast to the PV plant located in the Zhongzheng district, Taipei. Deep learning methods are
applied, taking into account the consistency between meteorological data and energy generation, as
well as the proximity of the measuring stations.
        </p>
      </sec>
      <sec id="sec-3-4">
        <title>3.4. Comparison</title>
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      </sec>
    </sec>
    <sec id="sec-4">
      <title>4. Final Remarks</title>
      <p>When applying AI tools for the management and sizing of solar energy solutions, several important
conclusions emerge. First, AI can substantially enhance the performance of solar systems. This
improvement is achieved through the optimization of solar panel positioning, accurate prediction
of energy demand, and facilitation of preventive maintenance. These factors contribute to a more
eficient use of solar energy, leading to increased energy production and lower operational costs. Such
improvements not only enhance the economic value of solar power but also underscore AI as an
indispensable ally in addressing the technical and operational challenges faced by the renewable energy
sector.</p>
      <p>Another significant benefit is enhanced sustainability. The application of AI in solar energy
management is a crucial step toward transitioning to renewable energy sources and reducing dependence on
fossil fuels. By maximizing system eficiency, AI plays a vital role in mitigating climate change and
promoting more sustainable energy practices. This advancement, therefore, not only meets contemporary
energy needs but also safeguards natural resources for future generations, underscoring AI’s essential
role in shaping a greener and more sustainable energy future.</p>
      <p>However, challenges must be addressed when implementing AI tools for solar energy management.
The complexity of implementation is a significant factor, as integrating AI systems often requires
substantial technical expertise and resources. Additionally, the initial cost of implementation can be
high and prohibitive for some organizations, particularly those with limited resources.</p>
      <p>Data security is also a critical concern. Protecting the data used by AI tools—including information
on solar system performance and usage patterns—is essential to ensure confidentiality and integrity.
Nonetheless, these challenges are not insurmountable. With the continuous advancement of technology
and the development of more accessible and secure management solutions, it is now possible to maximize
AI’s potential in transforming the solar energy sector.</p>
      <p>In summary, the implementation of AI tools in solar energy management marks a significant milestone
in the pursuit of more eficient, sustainable, and reliable energy solutions. Despite initial challenges, the
potential for performance improvement, sustainability promotion, and resource optimization makes AI
an indispensable transformative force in the renewable energy sector.</p>
    </sec>
    <sec id="sec-5">
      <title>Acknowledgments</title>
      <p>Fundação Sitawi supported the work of Leonardo Alves Messias through a permanence scholarship
(Commitment Term n. CRF_ALPB_2023_108), and Coordenação de Aperfeiçoamento de Pessoal de
Nível Superior (CAPES) and Fundação de Amparo a Pesquisa do Estado de Goiás (FAPEG) supported
the work of Raphael de Aquino Gomes.</p>
    </sec>
    <sec id="sec-6">
      <title>Declaration on Generative AI</title>
      <p>The authors have not employed any Generative AI tools.</p>
    </sec>
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