Photovoltaic Potential Research Articles

Estimation of Photovoltaic Potential of Urban Buildings Considering a Solar Panel Arrangement Using a 3D City Model

Estimation of Photovoltaic Potential of Urban Buildings Considering a Solar Panel Arrangement Using a 3D City Model

An Attention-Based Full-Scale Fusion Network for Segmenting Roof Mask from Satellite Images

Accurately segmenting building roofs from satellite images is crucial for evaluating the photovoltaic power generation potential of urban roofs and is a worthwhile research topic. In this study, we propose an attention-based full-scale fusion (AFSF) network to segment a roof mask from the given satellite images. By developing an attention-based residual ublock, the channel relationship of the feature maps can be modeled. By integrating attention mechanisms in multi-scale feature fusion, the model can learn different weights for features of different scales. We also design a ladder-like network to utilize weakly labeled data, thereby achieving pixel-level semantic segmentation tasks assisted by image-level classification tasks. In addition, we contribute a new roof segmentation dataset, which is based on satellite images and uses the roof as the segmentation target rather than the entire building to further promote the algorithm research of estimating roof area using satellite images. The experimental results on the new roof segmentation dataset, WHU dataset, and IAIL dataset demonstrate the effectiveness of the proposed network.

Electricity mix from renewable energies can avoid further fragmentation of African rivers

In Africa, mitigating climate change in a context of a growing human population and developing economies requires a bold transition to renewable energy (RE) resources. Declining costs for solar photovoltaics (by 90% between 2009 and 2023) and wind turbines (by 57% between 2010 and 2023) fuelled their construction, and hybrid forms such as floating photovoltaics (FPV) on existing hydropower reservoirs are increasingly being explored. Nevertheless, 65% of the proposed RE capacity in Africa remains hydropower, despite confirmed ecological, socioeconomic, and political ramifications on different spatiotemporal scales. The 673 proposed hydropower plants (HPPs) would increasingly affect river systems and threaten their biodiversity. While there is clear evidence that a transition to RE in Africa is technically feasible, there is a lack of spatially explicit studies on how this transition could be implemented. Hence, the aim of the present study is to explore options for an RE mix that avoids additional hydropower construction and, therefore, further river fragmentation. Attribute data of the open-accessible Renewable Power Plant Database (RePP Africa) were analysed to assess the amount of lost capacity due to operation stops. Geospatial analyses of solar irradiation and existing reservoir data were used to derive the potential for FPV. The degree of possible replacement of future hydropower was assessed under consideration of economically feasible wind and solar photovoltaic (PV) potential. To enhance electricity generation from existing HPPs, efficient and sustainable renewable power plant planning must integrate the risk of failure, as it has diminished the available capacity in the past up to 24%. Our findings further reveal that 25 African countries could replace the proposed hydropower development by FPV covering less than 25% of the surface area of their existing hydropower reservoirs. All 36 African countries could replace proposed hydroelectricity generation by fully exploiting feasible onshore wind and solar PV potential with a mean surplus of 371 TWh per year. In summary, our findings provide scientific evidence to support policy discussions on the potential electricity gains from (1) minimizing plant failure, (2) installing FPV as a co-use option, and (3) exploiting wind and solar resources. This study provides quantitative, data-based, and spatially explicit scenarios on the implementation of an RE mix that could relieve the dam building pressure on African rivers.

Greening airports: A methodological framework for site assessment and assessing solar PV potential

Due to energy intensiveness and carbon emissions, the aviation sector is under continuous environmental pressure. In this regard, airports have shown keen interest in solar photovoltaic (PV) technology to decarbonize their energy consumption. Implementing onsite solar projects in the airport is challenging due to various technical and safety aspects. Improper siting of solar PV arrays may adversely affect the safety of the passengers. This paper aims to develop a methodological framework for site assessment and potential estimation of PV projects in airport locations. The developed methodology is applied as a case study to seven Indian airports: Madurai, Goa, Raipur, Ahmedabad, Lucknow, Amritsar, and Dehradun. It was understood that the suitable area for solar PV projects on airport land depends on airspace restrictions, built area, and glare occurrence. On average, 30–40 % of the airport land is observed to be built area; hence, it is unavailable for land-based solar PV systems. Among the studied airports, the highest value of technical potential is observed for Raipur airport (21 MW). These conservative estimates provide baseline information for airport planning and development projects. This study is expected to be a reference material for energy specialists, airport stakeholders, and policymakers.

Impact of PCBM as a Third Component on Optical and Electrical Properties in Ternary Organic Blends.

This paper investigates the influence of constituent weight ratios on optical and electrical properties, with a particular focus on the intrinsic properties (such as electrical mobility) of ternary organic blends, highlighting the role of a third component. The study explores novel donor:acceptor1:acceptor2 (D:A1:A2) matrix blends with photovoltaic potential, systematically adjusting the ratio of the two acceptors in the mixtures, while keeping constant the donor:acceptor weight ratio (D:A = 1:1.4). Herein, depending on this adjustment, six different samples of 100-400 nm thickness are methodically characterized. Optical analysis demonstrates the spectral complementarity of the component materials and exposes the optimal weight ratio (D:A1:A2 = 1:1:0.4) for the highest optical absorption coefficient. Atomic force microscopy (AFM) analysis reveals improved and superior morphological attributes with the addition of the third component (fullerene). In terms of the electrical mobility of charge carriers, this study finds that the sample in which A1 = A2 has the greatest recorded value [μmax=1.41×10-4cm2/(Vs)]. This thorough study on ternary organic blends reveals the crucial relationship between acceptor ratios and the properties of the final blend, highlighting the critical function of the third component in influencing the intrinsic factors such as electrical mobility, offering valuable insights for the optimization of ternary organic solar cells.

High-Quality Data Enabling Universality of Band Gap Descriptor and Discovery of Photovoltaic Perovskites.

Extensive machine-learning-assisted research has been dedicated to predicting band gaps for perovskites, driven by their immense potential in photovoltaics. Yet, the effectiveness is often hampered by the lack of high-quality band gap data sets, particularly for perovskites involving d orbitals. In this work, we consistently calculate a large data set of band gaps with a high level of accuracy, which is rigorously validated by experimental and state-of-the-art GW band gaps. Leveraging this achievement, our machine-learning-derived descriptor exhibits exceptional universality and robustness, proving effectiveness not only for single and double, halide and oxide perovskites regardless of the underlying atomic structures but also for hybrid organic-inorganic perovskites. With this approach, we comprehensively explore up to 15,659 materials, unveiling 14 unreported lead-free perovskites with suitable band gaps for photovoltaics. Notably, MASnBr3, FA2SnGeBr6, MA2AuAuBr6, FA2AuAuBr6, FA2InBiCl6, FA2InBiBr6, and Ba2InBiO6 stand out with direct band gaps, small effective masses, low exciton binding energies, and high stabilities.

Solar-Powered Electric Vehicles: Enhancing Endurance and Sustainability through Photovoltaic Integration

The potential of solar photovoltaic (PV) technology as a transformative and sustainable energy solution in the context of global energy challenges is explored in this work. The advancements in solar PV technology, including innovative cell architectures like heterojunction and Passivated Emitter Rear Contact (PERC) cells, the emergence of perovskite solar cells, and the influence of roll-to-roll manufacturing processes are discussed in this paper. The paper also highlights the diversification of energy portfolios, enhanced energy system reliability, resilient energy infrastructure, energy security, and the profound environmental benefits associated with solar PV technology. The results of a performance study involving a prototype electric vehicle, both with and without integrating a solar panel as an alternative energy source are noted. The findings reveal a substantial increase in the vehicle’s endurance when the solar panel is incorporated, emphasizing the transformative potential of solar PV in reshaping energy systems, mitigating environmental hazards, and promoting responsible land use. The work underscores the ongoing journey towards a cleaner and more resilient energy future, empowered by the harnessing of solar energy.

Carbon offset potential of rooftop photovoltaic systems in China

As a promising tool for mitigating carbon emission, rooftop photovoltaics have attracted worldwide attention. This study examines the carbon offset potential of rooftop photovoltaics in 31 provinces in China. The future trends of carbon offset potentials over the lifetime of rooftop photovoltaic systems are investigated. The findings reveal that the carbon offset potentials vary significantly across different regions in China due to the combined effects of variations in climate conditions and the energy mix for electricity generation. The northern regions possess significantly higher carbon offset potentials than the southwestern areas. In 2021, the annual total carbon offset potential ranged from the lowest at −2.0 kg CO2/m2 in Tibet to the highest at 169.3 kg CO2/m2 in Beijing. The projected future trends indicate that Beijing and Tibet will respectively maintain their highest and lowest carbon offset potential rankings. Most provinces are projected to witness decreasing carbon offset potentials. In terms of the carbon offset potential over the lifetime of rooftop photovoltaics, the northern regions − Beijing, Tianjin and Inner Mongolia − rank the top three. Not only can these findings serve as reference for developing targeted policies for carbon mitigation in China, the methodology of this study can also be applied in other places to determine their carbon offset potentials of rooftop photovoltaics.

Towards Positive Energy Districts

Positive energy districts (PEDs) are a vision to enable and foster the energy transition in the building sector. The integration of heat pumps (HP) in buildings and districts to achieve a net positive energy balance is crucial. The efficiency of the electric and thermal energy system of districts can be improved with the use of HPs. This refers to both, the upgrade of waste heat and benefiting from simultaneous use and generation of energy in buildings at different temperature levels (space heating, DHW, space cooling/dehumidification) and includes self-consumption of on-site renewable electricity generation. Using the example of the new district Innsbruck Campagne, HP integration options as well as photovoltaic (PV) integration potentials are evaluated with respect to reaching a positive energy balance. Both simulation results as well as monitoring results are presented. The importance of very high building efficiency standards as well as well-designed and dimensioned systems to achieve a positive energy balance and to reduce the so-called winter gap is highlighted.

Maximizing Solar Integration: Enhancing Off-grid Rural Energy Storage in Zambia

Energy stands as an indispensable aspect of contemporary human life. This study endeavours to explore the challenges and opportunities associated with the adoption of photovoltaics (PV) for sustainable electricity supply in Africa, with a particular focus on Zambia. The primary objectives include assessing the current state of PV integration, identifying key obstacles, and highlighting potential applications in critical areas such as irrigation, rural electrification, and water heating. Drawing upon the latest research on PV in Africa, this study synthesizes information from the top ten most cited studies, with a specific emphasis on the complexities involved in large-scale PV integration. The research design entails a comprehensive review of technical aspects such as storage and bifacial modules, providing insights into the challenges faced in optimizing PV systems. The study primarily centres on Zambia, a country endowed with significant solar potential. Through case studies, it demonstrates the feasibility of employing PV for vital applications such as irrigation and rural electrification. The timeframe encompasses recent years, reflecting the dynamic nature of PV research and implementation. To evaluate the advantages and obstacles of PV adoption, a multifaceted approach is employed. This includes examining the potential of PV in specific applications, analyzing electrification rates in Zambian urban and rural areas (57% and 13% respectively), and identifying barriers such as high costs, inadequate infrastructure, and a lack of training. Additionally, thermal systems are considered, emphasizing both untapped potential and the limitations of solar cookers. The study incorporates interviews conducted in Lwangwa Village to gather firsthand perspectives on the use and necessity of energy. Furthermore, data from previous literature is utilized to compile valuable insights into the demand for clean energy in Zambia. Key findings underscore the untapped potential of PV in Zambia, highlighting its capacity to enhance energy access and reduce emissions. However, significant challenges exist, necessitating targeted policies, financial mechanisms, and community engagement to foster widespread adoption. Addressing infrastructure limitations, maintenance needs, costs, and social factors is essential to fully realize the benefits of PV implementation. Zambia's abundant solar resources present a promising pathway towards sustainable energy. However, strategic planning and support are imperative for successful PV integration. Future research endeavors should focus on investigating specific challenges arising from clean energy adoption, including potential health effects and negative impacts, to further advance sustainable energy initiatives.

SLOPE ANALYSIS OF CLOT-ADJUSTED SSI-FY4A DATA FOR SOLAR PV POWER POTENTIAL ASSESSMENT IN THE PHILIPPINES

Abstract. Utilization rate of energy from solar photovoltaic (PV) systems has surged considerably with the increase in global demand for sustainable energy solutions.The angle at which panels are positioned relative to the horizontal plane must be aligned with the sun's incoming radiation to achieve optimum power production. Unfortunately, this ideal alignment is not always feasible, particularly for panels lacking tracking systems. Therefore, determining the best tilt angle becomes a key factor that significantly influences the effectiveness of solar PV systems, considering various influencing factors. The study aims to establish the relationship between different slopes and solar PV performance and to assess the impact of this on energy generation efficiency for specific locations across Luzon and Mindanao. The study focuses on determining the optimal tilt for specific locations across Luzon, Visayas, and Mindanao. Sites including Metro Manila, Cebu, and Davao were selected as representative areas for each respective island group for being the most populous cities in their respective geographical island groups. Theoretical solar energy obtained from SSI was CLOT-adjusted and incorporated with dust and temperature effects to determine the maximum solar energy resource potential within the study area. Results show that the highest solar PV potential was determined at 5°–10° tilt angle for both Metro Manila and Davao followed by 10–20° and 20–30° tilt angle with an average of 86.42 W solar PV potential (PPV). For Cebu, the highest solar PV potential was determined at 20° to 30° tilt angle with the value of 95.99 W solar PV potential (PPV). The lowest PPV was found on installations with tilt > 30° in all the study areas at an average of 65.02 W. This suggests that to maximize solar PV output in different regions, installations should be tilted according to the optimal tilt angle specific to that region. The latitude differences across the country significantly impact which tilt angle is most effective, as they influence the amount of sunlight received in each area. To improve the accuracy of future studies, it is recommended to increase the number of data points per slope interval. While the differences observed in this study were small, having more data points can enhance the precision of average values obtained from formulas.

Improving the efficiency of solar photovoltaics by means of geothermal cooling: A year-long test campaign

Heating up of photovoltaic modules during operation results in a significant power output reduction. This effect is especially relevant in regions with the highest photovoltaic potential, where irradiance and ambient temperature are particularly high. In this paper, a novel low enthalpy geothermal cooling system that improves the efficiency of a commercial solar module is described and experimentally validated. Two heat exchangers, one attached to the backside of the module, and another introduced inside a 15 m deep borehole, are connected in a closed circuit. A water-based coolant is pumped through the system, evacuating the excess heat from the module, and dissipating it underground in a clean and efficient manner, without additional water consumption after filling the system.The performance of the cooling system was experimentally tested by implementing it, for the first time, in a single-axis solar tracking isolated photovoltaic facility. Extensive tests were carried out in Spain, between September 2021 and August 2022 under a wide variety of environmental conditions. The efficiency improvement system has demonstrated its technical feasibility over a one-year period, showing a peak net efficiency improvement up to 13.4 %. Moreover, a positive net efficiency improvement has been demonstrated all year long, even during the winter months.

A Review of Solar and Wind Energy Resource Projection Based on the Earth System Model

Many countries around the world are rapidly advancing sustainable development (SD) through the exploitation of clean energy sources such as solar and wind energy, which are becoming the core of the sustainable energy transition. In recent years, the continuous advancement of Earth system models (ESMs) has facilitated numerous studies utilizing them to predict long-term and large-scale meteorological elements, consequently enabling forecasts of wind and solar energy. These forecasts provide critical guidance for formulating national renewable energy policies. Nevertheless, the current literature on ESMs predicting wind and solar energy lacks sufficient integration. Hence, to comprehend the focal points and future research prospects, we conducted this systematic review, employing four academic search tools to comprehensively analyze the relevant literature from the past five years. We summarized the general analytical process and compared the content and conclusions of the literature. The study reveals that future photovoltaic (PV) potential for electricity generation may increase in certain regions but decrease in others, while the global potential for concentrated solar power (CSP) may diminish, influenced by diverse factors and displaying significant regional disparities. In addition, wind resource trends vary in different regions, and forecasts exhibit considerable uncertainty. Therefore, many studies have corrected wind speeds prior to predicting wind energy. Subsequent research endeavors should concentrate on optimizing ESMs, investigating the impacts of technological innovation, and enhancing the prediction and analysis of extreme weather events.

Comprehensive study on catalytic potential of Ti3C2Tx based catalyzer for Dye sensitized solar cells application

Abstract Recently Dye-sensitized solar cells (DSSC) have gained significant research limelight for having exceptional photovoltaic potential. However, DSSC became an underdog solar cell due to the use of an expensive transparent conductive layer (FTO/ITO) along with the use of rare earth element Pt to concoct counter electrode (CE). Thus, an attempt has been made to concoct a Ti3C2-TX MXene-based CE to replace both the transparent conductive layer and CE. Herein, relatively larger with less defective Ti3C2 flakes were produced by the minimally intensive layer delamination method, and physical architecture was investigated by X-ray diffraction (XRD) mapping, Field-emission scanning electron microscope (FE-SEM) and Dynamic light scattering (DLS), respectively. MXene flakes were drop cast on a glass substrate by dispersing it in ethanol, isopropyl alcohol, and deionized water, respectively, and found the least sheet resistance, 14.824 Ω/sq by 4-point probe test, owing to superior adsorption force with the glass substrate. Ethanol solvent facilitates optimum interlamellar spacing to promote fast diffusion and transportation. Further, the study was expanded by introducing it to numerous sintering temperatures to find the best result. The result revealed exceptional sheet resistance of 0.08 Ω/sq for the 120℃ sintered sample, which was encouraged by removing water intercalant and occupying H+. Further, the potential of MXene-based counter electrode’s catalytic activity has been studied through electrochemical impedance spectroscopy, Tafel polarization, and Cyclic voltammogram under iodide and triiodide-based electrolytes. The electrochemical study revealed 120℃ sintered sample superior to 140℃ sintered but comparable to Pt CE. 120℃ sintered Ti3C2-based CE performed exceptional 6.27% power conversion efficiency. Thus, this novel study communicates that Ti3C2-TX is a potential replacement for transparent conductive oxide layer and Pt, frequently used in Dye-sensitized solar cell applications.

Exploring the Feasibility of Solar Photovoltaic Generation for Residential Applications in Hubballi, Karnataka: A Simulation and Analysis Approach

This research paper explores the potential of solar photovoltaic (PV) generation in Hubballi, Karnataka, India, focusing on a small residential home premises. The objective is to assess the solar PV potential at this location using PVsyst simulation software and analyze the results. The paper begins with an introduction to solar PV technology and its significance in meeting energy demands. A literature review examines previous studies on solar PV potential in Karnataka, highlighting the factors influencing solar PV generation efficiency. The methodology section describes the study area, data collection methods, and the PVsyst simulation setup. The data analysis section presents the collected solar irradiation and temperature data and discusses the simulation results for solar PV generation at the selected premises. The performance evaluation of the PV system is based on the simulation outcomes. The discussion section compares the simulated results with expected solar PV potential, identifies factors affecting solar PV generation efficiency in Hubballi, and discusses the implications of the findings for residential installations. The conclusion summarizes the research findings, emphasizes the solar PV potential in Hubballi, and provides recommendations for future research and practical applications. This research contributes to the understanding of solar PV generation at the specific location of Hubballi and offers valuable insights for promoting renewable energy in residential settings

First-principles and experimental study to investigate structural, elastic, electronic, thermal, and optical properties of KCdCl3 metal halide perovskite crystals

In this research, we examine the structural, elastic, anisotropic, acoustic, electronic, thermo-physical, and optical properties of KCdCl3 using both the density functional theory method as well as experimental data characterizations. The x-ray diffraction and Fourier transform infrared spectroscopy showed that our synthesized sample was well crystalline (orthorhombic), and the values of the lattice parameters are closely matched those of the first principles study. The scanning electron microscopy measurements of our sample morphology and microstructure showed a high grain size. The elastic property indicates that the structure is both mechanically and dynamically stable. The band structures and the density of state computation assured the semiconducting nature of our sample. Mulliken atomic populations showed ionic and covalent bonding in these materials, which can also be said to be mechanical property. The negative value of Cauchy’s pressure indicates the presence of angular bonding in the structure. In addition, the structure has high machinability. The phase transitions and thermal breakdown of KCdCl3 were examined by thermo-gravimetric analysis, and we found weight loss occurs in three stages. UV–visible spectrophotometers assessed the optical absorption and transmittance, which suggests that KCdCl3 is a strong UV absorber that gradually rises with wavelength. While the elastic and mechanical characteristics are anisotropic, the optical parameters are almost isotropic. The high UV reflectivity (∼28.5%) shows the material may not be an efficient radiation reflector but has great photovoltaic and optoelectronics potential.

City-scale analysis of PV potential and visibility in heritage environment using GIS and LiDAR

Increasing the share of renewables, especially utilizing solar power in our energy mix is a highly prioritized aim of the EU. Budapest, the largest city and the capital of Hungary, contains almost 1 million flats in more than 190 thousand buildings, organized in various characteristic urban fabric types. Although on-site renewable energy production is severely limited in dense urban environments, the roofs offer a considerable potential to generate energy on-site.The present paper introduces a method to estimate the PV potential of rooftops on a large scale applying a GIS approach. Using LiDAR data, a Digital Surface Model (DSM) was created. The DSM was utilized to evaluate roof slope, orientation, and global irradiation. Solar potentials, available roof area, photovoltaic (PV) system capacities and estimated annual electricity production were derived from the GIS model. The method was used to develop an open access website called the Budapest Solar Map, which provides decision-makers with solar PV data. However, the nominal PV potential is limited by layers of heritage protection regulations that safeguard the sight of our case study area, Budapest, which is a World Heritage Site. Visibility is also surveyed with GIS and geometrical modeling from designated high points and from the street level, respectively.

Solar radiation modification challenges decarbonization with renewable solar energy

Abstract. Solar radiation modification (SRM) is increasingly being discussed as a potential tool to reduce global and regional temperatures to buy time for conventional carbon mitigation measures to take effect. However, most simulations to date assume SRM to be an additive component to the climate change toolbox, without any physical coupling between mitigation and SRM. In this study we analyze one aspect of this coupling: how renewable energy (RE) capacity, and therefore decarbonization rates, may be affected under SRM deployment by modification of photovoltaic (PV) and concentrated solar power (CSP) production potential. Simulated 1 h output from the Earth system model CNRM-ESM2-1 for scenario-based experiments is used for the assessment. The SRM scenario uses stratospheric aerosol injections (SAIs) to approximately lower global mean temperature from the high-emission scenario SSP585 baseline to the moderate-emission scenario SSP245. We find that by the end of the century, most regions experience an increased number of low PV and CSP energy weeks per year under SAI compared to SSP245. Compared to SSP585, while the increase in low energy weeks under SAI is still dominant on a global scale, certain areas may benefit from SAI and see fewer low PV or CSP energy weeks. A substantial part of the decrease in potential with SAI compared to the SSP scenarios is compensated for by optically thinner upper-tropospheric clouds under SAI, which allow more radiation to penetrate towards the surface. The largest relative reductions in PV potential are seen in the Northern and Southern Hemisphere midlatitudes. Our study suggests that using SAI to reduce high-end global warming to moderate global warming could pose increased challenges for meeting energy demand with solar renewable resources.

Understanding the climatology and long-term trends in solar radiation using ground based in-situ observations in India

Understanding the variations of solar power potential over the country is essential for the optimum utilisation of solar energy in power generation, which demands accurate information of solar radiation and its variations. In the present study, we investigate the climatology and trends of global radiation (GR), diffuse radiation (DR), bright sunshine hours (BHS) and technical potential of solar power (Solar Photovoltaic potential; SPV potential) using in-situ data procured from India Meteorological Department for the period 1985-2019. GR is high (low) over the northwest and inland areas of peninsular (extreme north and northeast) India, whereas DR is high (low) over the coastal stations (extreme northern parts of the country). BHS is more (less) over northwest (north, northeast and southern peninsular) India. The country has SPV potential in the range of 1800-3400 Wm-2 with substantial regional variations. High (low) SPV potential is observed in the northwest regions (north, northeast and southern peninsular India). The GR and BHS (DR) have (has) a significant decreasing (increasing) trend in most parts of the country. However, the rate of decreasing (increasing) of GR (DR) has been weakened (strengthened) in the recent decade. The technical potential of solar power has a significant decreasing trend in most of the selected stations which is alarming. It necessitates the wide use of solar panels with better efficiency to meet the energy requirements from solar resources.

Elucidating the Role of Ligand Engineering on Local and Macroscopic Charge‐Carrier Transport in NaBiS2 Nanocrystal Thin Films

AbstractTernary chalcogenides have emerged as potential candidates for ultrathin photovoltaics, and NaBiS2 nanocrystals (NCs) have gained appeal because of their months‐long phase‐stability in air, high absorption coefficients >105 cm−1, and a pseudo‐direct bandgap of 1.4 eV. However, previous investigations into NaBiS2 NCs used long‐chain organic ligands separating individual NCs during synthesis, which severely limits macroscopic charge‐carrier transport. In this work, these long‐chain ligands are exchanged for short iodide‐based ligands, allowing to understand the macroscopic charge‐carrier transport properties of NaBiS2 and evaluate its photovoltaic potential in more depth. It is found that ligand exchange results in simultaneous improvements in intra‐NC (microscopic) and inter‐NC (macroscopic) mobilities, while charge‐carrier localization still takes place, which places a fundamental limit on the transport lengths achievable. Despite this limitation, the high absorption coefficients enable ultrathin (55 nm thick) solar absorbers to be used in photovoltaic devices, which have peak external quantum efficiencies > 50%. In addition, temperature‐dependent transient current measurements uncover a small activation energy barrier of 88 meV for ion migration, which accounts for the strongly hysteretic behavior of NaBiS2 photovoltaic devices. This work not only reveals how the charge‐carrier transport properties of NaBiS2 NCs over several length and time scales are influenced by ligand engineering, but also unveils the facile ionic transport in this material, which limits the potential of NaBiS2 in photovoltaics. On the other hand, the discovery shows that there are opportunities to use this material in memristors, electrolytes, and other applications requiring ionic conduction.