А. Давлетьяров, A. Ибраев, Е. Ербаев, Е. Джаналиев · 8 authors
ABSTRACT: The article addresses the pressing issue of limited access to centralized energy supply for peasant and farm enterprises in the West Kazakhstan region, which significantly hinders the efficient operation of agricultural production. This problem is especially critical for the development of livestock farming, irrigation, and water supply systems in remote and hard-to-reach rural areas. The absence of reliable and continuous electricity sources negatively affects technological processes, increases operational costs, and reduces the overall sustainability and productivity of the agricultural sector. In this context, particular attention is given to the organization of autonomous energy supply systems based on renewable energy sources, primarily wind energy, to support groundwater extraction from wells used for domestic, drinking, and agricultural purposes.An analysis of the wind potential of the Republic of Kazakhstan demonstrates favorable conditions for the development of small-scale wind energy as a cost-effective and environmentally sustainable solution for decentralized power supply. It is shown that low-capacity wind energy installations designed to operate at low wind speeds (3–5 m/s) can efficiently drive pumping systems, ensuring stable groundwater lifting under rural conditions. The study substantiates the selection of a low-speed horizontal-axis multi-blade wind turbine as the most suitable configuration for such applications.A comparative analysis of the energy performance of different wind turbine types is conducted, focusing on the relationship between the power coefficient and the tip speed ratio. Based on the obtained results, the optimal geometric parameters of the rotor blades are determined, contributing to improved energy efficiency and operational reliability. The findings of the study can be applied in the design and implementation of autonomous wind-powered water supply systems for agricultural enterprises and the agro-industrial sector.
This paper assesses the role of green hydrogen and green ammonia in the low-carbon reconstruction of Ukraine’s energy sector. The country, severely affected by war, has more than 70% of its energy infrastructure damaged or destroyed, which calls for novel solutions for not only reconstructing but also rethinking Ukraine’s energy sector shaped by the Soviet-era planning. In this context, decentralized and renewable energy solutions appear to be one of the best options to achieve this goal. This study combines four novel and mutually reinforcing methods: a Scopus-based literature review of highly cited green hydrogen publications, natural language processing (NLP) and bibliometric network analysis of Ukraine-related hydrogen research, a SWOT assessment, and a geospatial hydrogen production cost model (GEOH2). The novelty of this research lies in this integrated Ukraine-specific framework, which links research trends, wartime reconstruction constraints, hub-level policy choices, and financing risk-sensitive cost modeling. Therefore, the quantitative part of GEOH2 estimates the levelized cost of green hydrogen, while ammonia is treated as a downstream screening-level conversion and export pathway rather than as a full plant-level ammonia model. Our results show that Ukrainian green hydrogen research is concentrated on renewable-energy strategy, wind and solar electrolysis, water and desalination constraints, gas grid blending, underground storage, ammonia derivatives, and decentralized energy systems. The GEOH2 results indicate that southern Ukraine has strong physical potential for competitive green hydrogen production under de-risked financing, while war risk financing can make even resource-rich areas economically unattractive. Odesa and Dnipro emerge as important export-oriented and industrial hubs, whereas Zakarpattia remains strategically relevant as a safer western corridor linked to European markets. Our findings demonstrate that Ukraine’s hydrogen and ammonia development needs to follow a phased pathway: domestic renewable build-out and grid repair, pilot electrolysis projects and screening-level ammonia conversion pathways, targeted de-risking and insurance mechanisms, and only then broader export corridor development. This pathway can support decarbonization, energy security, industrial modernization, and Ukraine’s long-term integration into European clean energy value chains.
Renewable energy in Africa has gained increasing attention as a strategic pathway to achieving sustainable development, energy security, and economic transformation. A structured search of peer-reviewed studies was conducted using Web of Science, Scopus, and ProQuest. Fifteen empirical studies met the strict PRISMA inclusion criteria for detailed systematic synthesis, while additional high-quality review articles, book chapters, and policy reports were incorporated to strengthen contextual interpretation of renewable energy deployment trends across Africa. This systematic review synthesizes empirical evidence on renewable energy deployment across the continent, focusing on trends, challenges, and opportunities. Africa is endowed with abundant solar, wind, hydropower, geothermal, and biomass resources, yet actual utilization remains uneven and limited, with solar and wind experiencing the most rapid growth in recent years. Hydropower continues to dominate installed capacity, while geothermal and emerging technologies remain largely underdeveloped. Persistent barriers to deployment include inadequate grid infrastructure, limited access to finance, policy and regulatory inconsistencies, institutional capacity constraints, and political instability, particularly in rural and decentralized systems. Despite these challenges, opportunities exist in the form of declining technology costs, growing private and international investment, expansion of decentralized energy systems, and regional cooperation initiatives. Strengthening policy implementation, improving governance coordination, investing in infrastructure and human capital, and promoting innovative financing mechanisms are critical to accelerating Africa’s renewable energy transition.
Moses Arthur Baidoo, Wang ZhiCheng, Liu Qi, Zhou ShuMin · 6 authors
Access to reliable electricity remains a pressing challenge in Sub-Saharan Africa, particularly in rural areas where over 600 million people live without power. This paper explores the potential of decentralized solar energy systems; such as solar home systems, mini-grids, and solar-powered appliances in addressing energy access challenges across rural Sub-Saharan Africa. While these systems offer clean, reliable, and scalable alternatives to conventional grid expansion, their adoption is constrained by regulatory uncertainty, limited financing options, and local capacity gaps. Drawing on case studies from five countries, the paper examines how recent innovations -including mobile-based Pay-as-you-go (PAYG) financing, hybrid renewable systems, and improved energy storage technologies are reshaping energy access models. It also outlines policy recommendations aimed at strengthening regulatory coherence, promoting regional cooperation, and enhancing sustainability. Ultimately, the study highlights how decentralized solar solutions can contribute to long-term environmental, financial, and social resilience, with direct implications for poverty alleviation and inclusive rural development in the region.
ABSTRACT: Universal access to electricity remains one of the major structural challenges to development in sub-Saharan Africa, and particularly in the Democratic Republic of Congo (DRC), where territorial disparities and low rural electrification rates significantly hinder inclusive economic growth. Faced with the technical and financial limitations of traditional centralized grids, mini-grids and other decentralized electrification solutions are emerging as alternatives adapted to the country's geographical, demographic, and socio-economic realities. However, the development of these solutions fundamentally depends on the ability to mobilize appropriate, sustainable, and structured financing mechanisms. High initial infrastructure costs, combined with the limited repayment capacity of rural populations and a still-developing institutional environment, constitute major constraints to investment. The analysis highlights the need for a hybrid financial architecture, combining private equity, concessional debt, subsidies, and innovative financial instruments such as mezzanine debt, crowdfunding, and pay-as-you-go mechanisms. The economic sustainability of projects depends on a delicate balance between the financial viability of operators and affordable pricing for users. Business models must incorporate diversification of energy services, the integration of productive uses, and rigorous risk management (demand, exchange rate fluctuations, regulatory instability). The leverage generated by combining different funding sources strengthens investment capacity and improves project resilience. Institutionally, the regulatory framework plays a crucial role. The clarity of tariff rules, legal stability, transparency in subsidy allocation, and the effectiveness of rural electrification agencies are key factors in the sector's attractiveness to private investors. Tax and customs incentives, as well as risk guarantee mechanisms, are essential levers for reducing the cost of capital and stimulating local financial sector involvement. The study of the Congolese context reveals considerable energy potential, particularly in hydroelectric and solar power, but also persistent challenges related to access to credit, administrative complexity, and the structuring of public-private partnerships. Improving the financing of mini-grids in the DRC therefore requires an integrated approach combining regulatory reforms, institutional capacity building, and financial innovation. Ultimately, financing mini-grids is not merely a technical or budgetary issue, but a strategic challenge for energy governance and structural transformation. Establishing a coherent financial and regulatory ecosystem is essential to ensure the sustainability of projects, accelerate rural electrification, and contribute significantly to achieving the Sustainable Development Goals, particularly SDG 7 on access to reliable, affordable, and sustainable energy.
Persistent electricity shortages and routine load shedding have long hindered social and economic development in Pakistan, with Punjab its most populous and industrialized province bearing a disproportionate share of the burden. In recent years, however, solar power has emerged as a central pillar of provincial strategies to enhance energy security and reduce dependence on conventional, fossil-fuel-based generation. This paper examines how solar energy is contributing to Punjab’s gradual shift from chronic load shedding toward greater energy independence. Adopting a qualitative, multiple-case design, the study draws on national and provincial policy documents, secondary reports, and peer-reviewed literature. It focuses on four key sectors residential, agricultural, educational, and industrial where solar initiatives have been promoted through programs such as free solar panel schemes for low-income households, school solarization, solar irrigation systems, and industrial rooftop installations. A comparative sectoral analysis evaluates these initiatives in terms of affordability, reliability, sustainability, and scalability. The findings show that solar energy has significantly improved supply reliability for many households and institutions, reduced operating costs for some farmers and industries, and opened new avenues for decentralized generation. At the same time, coverage remains uneven, key programs are still small relative to overall need, and implementation is constrained by financing barriers, bureaucratic delays, and limited technical capacity. The paper argues that Punjab’s trajectory illustrates both the transformative potential and the persistent limitations of solar-led energy transitions in developing-country contexts. It concludes that scaling up equitable, decentralized solar adoption supported by robust provincial policies, innovative financing, and institutional reforms will be essential if solar power is to move from a complementary role to a structural driver of energy independence.
Adama Sarr, Aldo Bischi, Umberto Desideri, Cheikh Mouhamed Fadel Kébé
Achieving universal electricity access in Senegal by 2030 remains a major policy challenge due to persistent spatial disparities in infrastructure, population density, and resource availability. This study conducts a nationwide, spatially explicit assessment of least-cost electrification pathways using OnSSET. The analysis develops context-specific scenarios to plan optimal technology mixes across rural and peri‑urban areas, based on differentiated tiers of electricity access. By integrating high-resolution geospatial, demographic, and techno-economic data, the model identifies the most economically viable solutions for achieving universal access. Results indicate that grid extension is the least-cost option for approximately 93.7 % of the population, largely concentrated in peri‑urban areas with high population density and proximity to existing grid infrastructure. In contrast, solar PV mini-grids (MG PV) and stand-alone PV (SA PV) systems are optimal for 0.7 % and 5.6 % of the population, respectively, mainly in remote, sparsely populated rural settlements. The total investment required to achieve universal electricity access by 2030 is estimated at USD 269.8 million, corresponding to 116.1 MW of additional installed capacity. Beyond quantifying cost-optimal solutions, the study demonstrates the potential of open-source geospatial models like OnSSET to support transparent, data-driven planning in developing country contexts. It also highlights key policy implications, emphasizing the need for integrated national electrification strategies that combine centralized and decentralized systems to address regional disparities. Limitations of the study include uncertainties in input data quality, static demand assumptions, and the exclusion of non-technical barriers such as institutional capacity and financing constraints. Nonetheless, the findings provide a valuable decision-support basis for Senegal’s ongoing energy transition and broader Sustainable Development Goal 7 (SDG7) objectives.
Background: Yemen is facing one of the most severe energy crises in the world, exacerbated by decades of conflict. In this context, sustainable energy solutions, particularly renewable energy technologies, have emerged as a critical pathway to addressing Yemen’s energy deficit while reducing environmental impact. The country possesses significant potential for renewable energy exploitation, especially solar and wind resources, due to its geographic location and climatic conditions. Scholars, policymakers, and development agencies have examined the challenges and opportunities facing Yemen's transition to a sustainable energy future. Objectives: This review paper aims to synthesize current knowledge on sustainable energy development in Yemen, exploring the potential of solar, wind, and other renewable resources, evaluating ongoing projects and policies, and identifying barriers and opportunities for future growth. By providing a comprehensive overview, this paper seeks to contribute to the understanding of how sustainable energy can support Yemen's recovery, economic development, and long-term resilience. Methods: The current review have been studied and analysed key studies and technical reports from 2010 to 2025, including contributions from the United Nations Development Programme (UNDP), the International Renewable Energy Agency (IRENA), the World Bank, and regional academic institutions. The analysis categorizes existing literature into five thematic areas: (i) renewable energy potential assessment, (ii) energy policy and governance, (iii) investment and financing mechanisms, (iv) environmental and social impacts, and (v) capacity development and institutional strengthening. Results: Recent policy reforms, scheduled for 2024, aim to establish the Authority for Renewable Energy and Energy Efficiency. The evolution of renewable energy policy in Yemen from 2010 to 2024 shows steady growth. Financing is a key challenge in Yemen's renewable energy transformation, although limited access to international financing, coupled with political risks, has limited private sector engagement. Renewable energy brings numerous environmental and social benefits to Yemen. Research shows that solar microgrids increase household incomes by 15 – 20%. Environmental goals include reducing CO2 emissions by 40% by 2050, increasing green space, and ensuring sustainable land-use planning for solar and wind farms. Furthermore, regional comparative studies show that the cost of solar photovoltaic (PV) systems in Yemen is competitive with fossil fuel-based generation, especially when long-term maintenance and fuel import costs are taken into account. Overall, Yemen's renewable energy potential is quite promising, with solar energy leading the way due to its volume, cost-effectiveness, and ease of deployment. Wind, biomass, and geothermal resources offer additional opportunities that can diversify Yemen's energy mix, increase resilience, and promote sustainable development. Conclusion: Ambitious targets have been set to diversify Yemen's energy mix and improve efficiency, including a 15% share of renewable energy by 2025, rural solar electrification, and improved energy sector efficiency. However, achieving success in this area still requires concessional and blended financing to reduce investment risks, the promotion of modular and decentralized deployment models (mini-grids, rooftop solar panels), and the integration of renewable energy expansion into resilience and recovery planning.
As the world grapples with climate change and energy insecurity, renewable energy has emerged as a central pillar of sustainable development. However, the transition to renewables faces persistent technological, economic, policy, and social challenges. This paper explores the dual nature of renewable energy—its immense promise and its complex barriers—through global trends and India-focused case studies. By analyzing large-scale and decentralized renewable projects, including Bhadla, Pavagada, Rewa, and Kurnool solar parks, as well as microgrid initiatives in Dharnai and Indira Nagar, this study identifies strategic pathways for inclusive and resilient energy futures. The analysis reveals that integrated policies, innovative financing, community participation, and technological innovation are key to maximizing renewable energy’s transformative potential. Key words: climate change, energy, renewable.
Anis Ur Rehman, M. J. Sanjari, Rajvikram Madurai Elavarasan, Taskin Jamal
Transformation of the energy sector is necessary to meet climate targets and ensure universal access to reliable and affordable energy. Despite progress, more than 675 million people still lack electricity and 770 million face an unreliable power supply. Renewable energy now provides nearly 30 % of global electricity generation and represents approximately 17.9 % of total final energy consumption. This amount is insufficient for the 1.5 ∘ C pathway and requires a tripling of renewable capacity by 2030. Energy efficiency also lags with average annual gains of 1.6 % compared with the 4 % required for climate-aligned energy scenarios. Therefore, this paper reviews pathways toward decentralized low-carbon solutions that can accelerate global energy transformation. The review paper examines how technologies such as microgrids, virtual power plants, energy storage systems, and vehicle-to-grid (V2G) solutions are reshaping modern energy systems. It highlights that digitalization, smart grids, and sector integration are key to building flexible and consumer-focused networks. However, achieving sustainable energy access requires more than new technologies. Strong governance, fair financing, and social inclusion are equally important to ensure a just and balanced energy transition. Case studies from Asia, Africa, and Latin America show how policy, innovative financing, and regional cooperation can drive progress despite challenges such as underinvestment, fossil fuel dependency, and energy poverty. The review demonstrates that an integrated approach, combining technological innovation, financial mechanisms, and inclusive policies, can collectively build low-carbon, resilient, and equitable energy systems. • Research gaps in sustainable energy supply on technology, policy, and equity are identified. • Sustainability-aligned pathways toward decentralized low-carbon solutions are reviewed. • Governance and planning are key for sustainable energy transitions. • A comprehensive framework of technical, economic, and social insights for sustainable transition is introduced.
This critical review examines decentralised renewable energy (DRE) systems as game changers for sustainable energy access in Sub-Saharan Africa (SSA). Although rich in renewable resources, over 570 million people in rural communities lack electricity. Traditional energy models, shaped by colonial histories and marked by inefficiencies, have failed to meet the continent's diverse energy needs. DRE systems provide flexible, community-focused solutions that promote energy equity, foster economic growth, and enhance climate resilience. Using Critical Juncture Theory and the Rational Choice Model, this study examines factors influencing DRE adoption. Analyses show how DRE encourages energy democracy, local ownership, and aligns with Sustainable Development Goals, including SDG 7 (Clean Energy) and SDG 13 (Climate Action). However, these systems face obstacles like fragmented policies, insufficient funding, technical gaps, and governance issues. Case studies from Kenya, Nigeria, South Africa, and Ethiopia demonstrate implementation strategies, revealing supportive environments and challenges. This review synthesises policy discussions, highlights innovations like pay-as-you-go financing and digitalisation and outlines an integrated energy planning roadmap. Recommendations include regulatory reforms, blended financing models, capacity-building initiatives, and regional cooperation. This paper argues that decentralisation should be viewed not as a temporary measure but as a foundation for energy strategies. With visionary leadership, collaborative governance, and targeted investments, decentralised systems can transform Sub-Saharan Africa's energy future, prioritising equity, resilience, and sustainability. • Decentralized renewable energy (DRE) is paving the way for fair energy access across Sub-Saharan Africa. • ii. DRE systems are all about empowering communities, promoting energy democracy, and building resilience against climate change. • iii. Unfortunately, there are policy, financial, and technical hurdles that hold back the widespread adoption of DRE in the area. • iv. Various case studies showcase a range of DRE strategies and creative financing solutions. • v. For a successful shift to sustainable energy, integrated policy reforms and regional collaboration are essential.
Climate change, energy crises, military actions in the world, and unstable oil prices create enormous challenges for the world’s nations. The need to use less fossil fuels opens opportunities for new or somewhat neglected green technologies. To reform the energy sector, it is necessary to have a clear and measured strategy. This allows for the identification of the potential of renewable resources in each space, while finding sources of financing for the transformation. The use of renewable resources makes it possible to solve an actual problem of the developed world—as the population of cities grows, the economic vitality of regions drops significantly. By creating new energy production capacities in the regions, social exclusion is reduced, and the main resources of the regions are better used—land areas, farms, and biomass sources. Nowadays, mankind is experiencing the third significant transformation that converts from conventional fossil fuels to new energy. The future development will go along with the three major trends—resource-type carbon reduction, production technology intensification, and utilization method diversification [1]. Based on these directions of transformation, the main investment decisions will be made, which will promote the progress of the energy system. Humanity is so far the least advanced in carbon collection and burial technologies, but the development of other trends allows for tangible progress.
Nkanyiso Msweli, Gideon Ude Nnachi, Coneth Graham Richards
Electricity access deficits remain acute in Sub-Saharan Africa (SSA), where more than 600 million people lack reliable supply. Green hydrogen, produced through renewable-powered electrolysis, is increasingly recognized as a transformative energy carrier for decentralized systems due to its capacity for long-duration storage, sector coupling, and near-zero carbon emissions. This review adheres strictly to the PRISMA 2020 methodology, examining 190 records and synthesizing 80 peer-reviewed articles and industry reports released from 2010 to 2025. The review covers hydrogen production processes, hybrid renewable integration, techno-economic analysis, environmental compromises, global feasibility, and enabling policy incentives. The findings show that Alkaline (AEL) and PEM electrolyzers are immediately suitable for off-grid scenarios, whereas Solid Oxide (SOEC) and Anion Exchange Membrane (AEM) electrolyzers present high potential for future deployment. For Sub-Saharan Africa (SSA), the levelized costs of hydrogen (LCOH) are in the range of EUR5.0–7.7/kg. Nonetheless, estimates from the learning curve indicate that these costs could fall to between EUR1.0 and EUR1.5 per kg by 2050, assuming there is (i) continued public support for the technology innovation, (ii) appropriate, flexible, and predictable regulation, (iii) increased demand for hydrogen, and (iv) a stable and long-term policy framework. Environmental life-cycle assessments indicate that emissions are nearly zero, but they also highlight serious concerns regarding freshwater usage, land occupation, and dependence on platinum group metals. Namibia, South Africa, and Kenya exhibit considerable promise in the early stages of development, while Niger demonstrates the feasibility of deploying modular, community-scale systems in challenging conditions. The study concludes that green hydrogen cannot be treated as an integrated solution but needs to be regarded as part of blended off-grid systems. To improve its role, targeted material innovation, blended finance, and policies bridging export-oriented applications to community-scale access must be established. It will then be feasible to ensure that hydrogen contributes meaningfully to the attainment of Sustainable Development Goal 7 in SSA.
Energy access and utilization remain highly unequal across sub-Saharan Africa (SSA) countries, despite the region's vast natural resources and growing energy needs. This study examines the differential inequalities in energy access and utilization in selected SSA countries, focusing on demand and supply-side constraints, technological opportunities, and the role of government and private sector interventions. The review paper highlights the persistent energy poverty affecting over 600 million people in SSA, particularly in rural areas, where reliance on traditional biomass remains prevalent. Infrastructure deficiencies, high energy costs, and inadequate policy frameworks further exacerbate these inequalities. The paper underscores the critical role of governments in formulating effective energy policies, implementing subsidies, and fostering public-private partnerships to expand sustainable energy access. The private sector's involvement in financing and deploying decentralized energy solutions is identified as a key driver of progress. Recommendations include strengthening policy and regulatory frameworks, expanding regional power pools, investing in decentralized energy solutions, and promoting financial inclusion through innovative funding mechanisms. By addressing these challenges, SSA can move towards achieving equitable and sustainable energy access, fostering economic growth, and improving overall quality of life as key objectives of achieving the sustainable development goals (SDGs).
Type of the article: Research Article AbstractDecentralization and renewable energy have gained significant global attention due to their potential to enhance energy security, promote sustainability, and democratize energy access. This study aims to provide a comprehensive bibliometric analysis of research trends, key contributors, and thematic developments in the field of the decentralization of energy sources and their renewability. The research methodology involves a bibliometric analysis based on data extracted from the Scopus database, covering publications from 1973 to 2025. The analysis reveals exponential growth in research output, particularly after 2014, with over 3,700 publications recorded in 2023 alone. Citation trends indicate that foundational studies on decentralized microgrids and distributed energy systems remain highly influential, while recent works on blockchain-based energy trading and AI-driven energy management are gaining prominence. The study identifies China (11.7% of total publications), the United States (6.5%), and India (5.7%) as the leading contributors, with significant research activity also observed in European countries. Additionally, journals such as Applied Energy, Renewable Energy, and Energies serve as the primary publication platforms in this domain. Thematic analysis highlights a shift from bioenergy and land-use studies toward smart grids, energy storage, artificial intelligence, and decentralized finance for energy markets. Furthermore, co-authorship and international collaboration have increased significantly, with 25% of papers involving multi-country research efforts. Keyword analysis indicates growing research interest in emerging topics such as hydrogen energy, demand-side management, and digitalization in decentralized energy systems. These findings underscore the increasing interdisciplinary nature of decentralized energy research, integrating technological, economic, and policy dimensions. AcknowledgmentThis study was prepared as part of the project IZURZ1_224119/1 (Swiss National Science Foundation).
Meselu Tegenie Mellaku, Yibeltal T. Wassie, Pernille Seljom, Muyiwa S. Adaramola
The economy of East Africa (EA) is striving for a structural transformation with a strong focus on expanding the manufacturing sector. However, challenges related to modern and reliable energy supply have hindered the sector's growth performance across the region. This systematic review explores the potential, opportunities, and challenges to integrating decentralized renewable energy solutions to bridge the energy supply-demand gap in the EA's manufacturing sector. It also provides up-to-date insights into the extent of integration of decentralized renewable energy technologies in the EA manufacturing sector. Relevant data and information for the review were retrieved from 46 references, including databases and web-based sources. The findings highlight that the EA region possesses abundant untapped solar, wind, and bioenergy resources that can close the sector's energy supply-demand gap. The review also reveals that renewable energy solutions are becoming increasingly techno-economically competitive with conventional energy sources for hybrid and stand-alone applications in the manufacturing sector. However, several challenges impede the integration of decentralized renewable energy technologies in the sector, including a lack of enabling regulatory frameworks, limited financing options, limited access to renewable technologies , and a lack of skilled labor. Nonetheless, international initiatives aimed at supporting developing countries in combating climate change can help overcome the region's financial and technological constraints by facilitating technology transfer, capacity building, and offering affordable financing options. Furthermore, the ambition of East African nations to expand their manufacturing sectors presents a stimulating opportunity to accelerate the integration of decentralized renewable energy technologies into the sector.
This paper examines the role of advanced biofuels in promoting energy access and economic growth in rural areas, with a focus on developing countries. Advanced biofuels, produced from non-food biomass sources such as agricultural residues, algae, and waste, have the potential to reduce rural energy poverty while creating economic opportunities. Through case studies of successful initiatives in countries like India and Brazil, this study highlights how decentralized biofuel production has improved energy access, created local employment, and enhanced agricultural value chains. Notable findings include the establishment of community-led biofuel plants that reduced reliance on imported fossil fuels and generated sustainable incomes for farmers by utilizing crop residues. The study also identifies key challenges such as limited infrastructure, access to financing, and policy support, while offering actionable recommendations to scale advanced biofuel adoption. Overall, advanced biofuels present a promising pathway to sustainable rural development by enhancing energy security, reducing environmental impact, and fostering economic growth.
Abstract Nigeria’s urban areas continue to face unreliable electricity supply, rising demand, and dependence on costly, polluting petrol and diesel generators. Hybrid renewable energy systems (HRES) — integrating solar, wind, and battery technologies — offer a viable pathway to provide clean, decentralized, and resilient power. This review critically examines the policy, institutional, and governance factors shaping HRES deployment in urban Nigeria, identifying the key barriers and reforms required to scale adoption. Findings reveal that expansion is constrained by fragmented regulation, weak institutional coordination, limited access to affordable finance, and fossil-fuel subsidies that distort energy prices and discourage renewable investment. Institutional overlap among the relevant agencies further constrains implementation. Technical barriers, such as limited local expertise, high component import costs, and poor grid integration, further elevate project risks and reduce system reliability. The study recommends regulatory harmonization under the new Electricity Act (2023), implementation of performance-based fiscal incentives, and expansion of green financing mechanisms to lower investment risk. Strengthening local manufacturing, research and development, and workforce capacity will be essential to reduce dependence on imports and sustain long-term growth. Finally, promoting gender equity, community participation, and inclusive business models can enhance social acceptance and promote fair distribution of the benefits associated with HRES across all urban populations. Collectively, these measures can accelerate Nigeria’s transition toward a cleaner, more reliable, and climate-resilient urban energy future.
Chinonso Nwanevu, Segun Samuel Oladipo, Abidemi Obatoyinbo Ajayi
Designing effective policy frameworks for the implementation of microgrids in developing countries is crucial for advancing sustainable energy access. Microgrids offer a decentralized and resilient solution to energy challenges, particularly in regions with limited grid infrastructure. However, the successful deployment of microgrids requires a nuanced understanding of the opportunities, challenges, and pathways to integration within the unique contexts of developing nations. This study explores the key factors influencing the design and implementation of microgrid policies, including regulatory environments, financial incentives, and technological innovations. It highlights the potential of microgrids to enhance energy security, reduce carbon emissions, and support economic development. At the same time, it addresses the challenges related to financing, regulatory compliance, and the need for capacity-building in local communities. By analyzing case studies from various developing countries, the study identifies best practices and strategic recommendations for policymakers to create supportive frameworks that encourage the adoption of microgrids. The research underscores the importance of international collaboration, public-private partnerships, and adaptive policy mechanisms that can respond to the evolving needs of the energy sector. Ultimately, the study provides a roadmap for leveraging microgrids as a key component of sustainable energy strategies in developing countries, contributing to broader goals of energy equity, environmental sustainability, and economic resilience.
Abstract Energy geography has not scrutinized the role of energy infrastructures and market design for decentralized energy production and local development. The paper addresses this research gap by looking at the emerging green‐hydrogen market in Germany. We argue, first, that the capacity and geography of infrastructures and associated bottlenecks determine how supply and demand can be matched at different scales. Second, market design and associated controversies over infrastructure bottlenecks are important for understanding the green‐hydrogen market and its geography and financing. Conceptually, we draw on the geography‐of‐markets literature. Empirically, we show how infrastructure bottlenecks and market design link the green‐hydrogen to the renewable‐electricity market. As long as the market design requires green‐hydrogen production in geographical and temporal correlation with renewable‐electricity generation, the geography of green‐hydrogen production follows the geography of renewable‐electricity generation. Moreover, bottlenecks in transportation infrastructures offer a window of opportunity for decentralized production and local development.
Climate change persists as a pressing global issue due to high greenhouse gas emissions from fossil fuel-based energy sources. A transition to a greener energy matrix combined with carbon offsetting is imperative to mitigate the rate at which global temperature ascends. While countries have deployed faith in green hydrogen to accelerate worldwide decarbonization efforts, the concurrent rise of blockchain-operated crypto-applications, such as bitcoin, has exacerbated climate change concerns. In this study, we propose technological solutions that combine the green hydrogen infrastructure with bitcoin mining operations to catalyze environmental and socioeconomic sustainability in climate change mitigation strategies. Since the present state of crypto-operations undeniably contributes to worldwide carbon emissions, it becomes vital to explore opportunities for harnessing the widespread enthusiasm for bitcoin as an aid toward a sustainable and climate-friendly future. Our findings reveal that green hydrogen production, paired with crypto-operations, can accelerate the deployment of solar and wind power capacities to boost conventional mitigation frameworks. Specifically, leveraging the economic potential derived from green hydrogen and bitcoin for incremental investment in renewable energy penetration, this dynamic duo can enable capacity expansions of up to 25.5% and 73.2% for solar and wind power installations. Therefore, the proposed technological solutions that leverage green hydrogen and bitcoin mining, bolstered with appropriate policy interventions, can not only strengthen renewable power generation and carbon offsetting capacities but also contribute significantly to achieving climate sustainability.
Michael M. Santos, Ana Teresa Vaz Ferreira, João Lanzinha
Africa has abundant solar resources but only 2% of its current capacity is generated from renewable sources. Photovoltaics (PV) offer sustainable, decentralized electricity access to meet development needs. This review synthesizes the recent literature on PV in Africa, with a focus on Mozambique. The 10 most cited studies highlight the optimization of technical components, such as storage and bifacial modules, and challenges in integrating large-scale PV. Case studies demonstrated Mozambique’s potential for PV applications in water heating, irrigation, and rural electrification. These benefits include reduced emissions and energy access. However, barriers, such as high costs, lack of infrastructure, and training, exist. While solar cookers are insufficient, thermal systems have unrealized potential. Mozambique’s urban and rural electrification rates are 57% and 13%, respectively, despite its energy resources. Targeted policies, financing, and community engagement are essential for promoting adoption. While PV can sustainably expand electricity access, coordinated efforts must address costs, infrastructure, maintenance, and social factors for successful implementation. Mozambique has immense solar potential, but strategic planning and support are critical to unlocking these benefits. This review provides insights into optimizing PV systems and policy frameworks for a clean and inclusive energy production future in Africa, to synthesize the 10 most cited studies on photovoltaic solar energy in Africa, and to deeply reflect upon the current energy needs in Mozambique, the benefits of employing PV and solar thermal systems, and the challenges of implementing such systems within the Mozambican context.
Hydrogen has recently been proposed as a versatile energy carrier to contribute to archiving universal access to clean cooking. In hard-to-reach rural settings, decentralized produced hydrogen may be utilized (i) as a clean fuel via direct combustion in pure gaseous form or blended with Liquid Petroleum Gas (LPG), or (ii) via power-to-hydrogen-to-power (P2H2P) to serve electric cooking (e-cooking) appliances. Here, we present the first techno-economic evaluation of hydrogen-based cooking solutions. We apply mathematical optimization via energy system modeling to assess the minimal cost configuration of each respective energy system on technical and economic measures under present and future parameters. We further compare the potential costs of cooking for the end user with the costs of cooking with traditional fuels. Today, P2H2P-based e-cooking and production of hydrogen for utilization via combustion integrated into the electricity supply system have almost equal energy system costs to simultaneously satisfy the cooking and electricity needs of the isolated rural Kenyan village studied. P2H2P-based e-cooking might become advantageous in the near future when improving the energy efficiency of e-cooking appliances. The economic efficiency of producing hydrogen for utilization by end users via combustion benefits from integrating the water electrolysis into the electricity supply system. More efficient and cheaper hydrogen technologies expected by 2050 may improve the economic performance of integrated hydrogen production and utilization via combustion to be competitive with P2H2P-based e-cooking. The monthly costs of cooking per household may be lower than the traditional use of firewood and charcoal even today when applying the current life-line tariff for the electricity consumed or utilizing hydrogen via combustion. Driven by likely future technological improvements and the expected increase in traditional and fossil fuel prices, any hydrogen-based cooking pathway may be cheaper for end users than using charcoal and firewood by 2030, and LPG by 2040. The results suggest that providing clean cooking in rural villages could economically and environmentally benefit from utilizing hydrogen. However, facing the complexity of clean cooking projects, we emphasize the importance of embedding the results of our techno-economic analysis in holistic energy delivery models. We propose useful starting points for future aspects to be investigated in the discussion section, including business and financing models.