The increasing pressure on water, energy, and food systems in arid and semi-arid regions has accelerated the search for integrated solutions capable of addressing these interconnected challenges. In the MENA region, where water scarcity is structural and climate change is intensifying hydrological variability, the convergence of renewable energy and agriculture has emerged as a strategic pathway toward sustainability. In particular, the coupling of renewable energy technologies with brackish water desalination offers a promising approach to support high-value crop production while minimizing environmental impacts and enhancing resource efficiency. This integrated paradigm aligns with the water–energy–food nexus framework, emphasizing synergies, co-benefits, and systemic optimization.
The Case for Renewables-Powered Desalination
Water scarcity remains the primary constraint on agricultural productivity in MENA, where a significant proportion of groundwater resources is brackish and unsuitable for direct irrigation without treatment. Conventional desalination technologies, while technically mature and effective, are highly energy-intensive and largely dependent on fossil fuels. This dependence translates into relatively moderate capital expenditures (CAPEX) at the installation stage but leads to significantly higher operational expenditures (OPEX) over time due to continuous fuel consumption, exposure to volatile energy markets, and increasing carbon-related costs.
In contrast, renewable energy-powered desalination systems, particularly those based on solar photovoltaics (PV), require higher upfront CAPEX due to investments in solar infrastructure, storage systems, and integration components. However, they benefit from near-zero fuel costs, resulting in substantially lower and more predictable OPEX over their lifetime.
This economic trade-off becomes particularly advantageous in the medium to long term. While fossil fuel-based desalination systems may appear cost-effective initially, their cumulative operational costs often exceed those of renewable-powered systems within a relatively short payback period. In high solar irradiance regions such as MENA, solar-powered desalination systems can achieve competitive or even lower levelized costs of water (LCOW), especially when long-term fuel price escalation and carbon pricing are considered [1,2]. Furthermore, renewable systems enhance energy security and reduce vulnerability to external shocks, making them particularly suitable for decentralized agricultural applications.
Solar-powered desalination systems provide an environmentally sustainable alternative by harnessing abundant local energy resources while significantly reducing greenhouse gas emissions. This dual advantage-economic resilience and environmental sustainability positions renewable energy-driven desalination as a strategic solution for ensuring long-term water security in arid environments. Recent reviews highlight that such systems can substantially reduce the carbon footprint of water production while improving the sustainability and reliability of water supply systems [1].
Among desalination technologies, reverse osmosis (RO) and electrodialysis reversal (EDR) are particularly suitable for brackish water applications due to their relatively low energy requirements compared to thermal processes. Studies have demonstrated that photovoltaic-powered RO systems can achieve high efficiency and cost-effectiveness, especially in regions with moderate salinity levels such as North Africa. Comparative analyses indicate that solar-powered RO systems are more economically viable in these contexts, while thermal desalination remains more suitable for high-salinity feed waters typical of Gulf countries [2].
Why Integration of Renewable Energy into Agriculture?
Beyond water production, the integration of renewable energy into agriculture generates multiple co-benefits across environmental, economic, and social dimensions. One of the most innovative approaches is agrivoltaics, which involves the co-location of solar panels and agricultural crops on the same land. This approach enhances land-use efficiency by enabling simultaneous energy and food production while creating favorable microclimatic conditions for crops. Partial shading from solar panels reduces evapotranspiration, conserves soil moisture, and can improve yields for certain high-value crops such as vegetables and fruits. In water-scarce environments, these effects contribute to significant water savings and increased resilience to heat stress.
When agrivoltaics is combined with solar-powered desalination, the resulting systems can produce both energy and irrigation water in a fully integrated manner. Solar panels generate electricity to operate desalination units, which convert brackish groundwater into irrigation-quality water. This closed-loop system enhances the autonomy of agricultural operations, particularly in remote or off-grid areas, and reduces reliance on external inputs. Moreover, the use of brackish water resources alleviates pressure on freshwater reserves, contributing to sustainable water management.
The co-benefits of such integrated systems extend to environmental sustainability through reduced greenhouse gas emissions and improved resource efficiency. Solar-powered desalination eliminates the need for fossil fuel-based energy, significantly lowering emissions associated with water production. In addition, the utilization of marginal lands and saline water resources for agriculture reduces land degradation and supports ecosystem restoration. Economically, the reduction in energy costs and the potential for decentralized operation improve the profitability of agricultural activities, particularly for high-value crops that require reliable water supply. Socially, these systems enhance rural livelihoods by creating employment opportunities, improving food security, and increasing resilience to climate shocks.
Examples from the MENA Region
Several successful examples from the MENA region illustrate the practical implementation of renewable energy–agriculture integration. In Egypt, solar-powered desalination systems have been deployed to treat brackish groundwater for irrigation in desert agriculture projects. A recent study demonstrated the technical feasibility and economic viability of solar-powered desalination for agricultural use, highlighting its potential to support sustainable farming in arid environments [3]. These systems have enabled the cultivation of high-value crops in desert areas while reducing dependence on diesel-powered water pumping.
In Algeria, research on photovoltaic-powered reverse osmosis systems has shown promising results for decentralized water supply in agriculture. A detailed feasibility study demonstrated the integration of PV systems with RO desalination to provide sustainable irrigation water, indicating favorable economic returns and reduced energy consumption [4]. This example underscores the relevance of such systems for national strategies aiming at enhancing water security and agricultural productivity.
In Jordan and the broader Levant region, integrated solar desalination projects have been developed to address water scarcity in agriculture. Comprehensive regional assessments emphasize the role of solar desalination technologies in supporting agriculture and water sustainability while highlighting the importance of hybrid system configurations [1].
In Palestine, solar PV-powered seawater reverse osmosis systems have been designed to enhance sustainability in water supply for agriculture. Case studies demonstrate the potential of solar PV systems to power desalination units efficiently, reducing operational costs and improving system reliability in resource-constrained environments [5].
Comparative analyses of different renewable energy–desalination configurations reveal important insights into system optimization. Photovoltaic-powered RO systems are currently the most mature and widely deployed technology due to their high efficiency and scalability. However, challenges such as membrane fouling, brine disposal, and intermittency of solar energy must be addressed. Hybrid systems that combine PV with thermal energy or energy storage solutions offer promising avenues to enhance reliability and performance. Reviews of hybrid solar desalination systems highlight their potential to achieve higher efficiency and operational flexibility under variable climatic conditions [6].
Emerging innovations in solar desalination further expand the potential of integrated renewable energy–agriculture systems. Advances in materials science and system design are improving the performance and cost-effectiveness of desalination technologies. Experimental studies on solar stills and interfacial evaporation technologies demonstrate the potential for low-cost, decentralized water production using renewable energy and locally available materials [7]. These innovations are particularly relevant for smallholder farmers and rural communities.
Despite the significant potential of integrated renewable energy and agriculture systems, several challenges remain. Technical challenges include improving system reliability, reducing maintenance requirements, and managing brine disposal in an environmentally sustainable manner. Economic barriers, such as high initial investment costs and limited access to financing, can hinder adoption. Policy and regulatory frameworks must evolve to support decentralized renewable energy and water systems, while capacity building and knowledge transfer are essential for scaling up these solutions.
Bottom Line
The integration of renewable energy and agriculture through brackish water desalination represents a transformative approach to addressing the water–energy–food nexus in the MENA region. By leveraging abundant solar resources, these systems can provide sustainable and cost-effective solutions for irrigation, enabling the production of high-value crops in water-scarce environments.
The co-benefits extend across environmental, economic, and social dimensions, contributing to climate mitigation, resource efficiency, and rural development. Successful examples from Egypt, Algeria, Jordan, and Palestine demonstrate the feasibility and potential of these approaches, while ongoing research continues to enhance their performance and scalability.
References
[1] Al-Addous, M.; Bdour, M.; Rabaiah, S.; Boubakri, A.; Schweimanns, N.; Barbana, N.; Wellmann, J. Innovations in Solar-Powered Desalination: A Comprehensive Review of Sustainable Solutions for Water Scarcity in the Middle East and North Africa (MENA) Region. Water 2024, 16(13), 1877.
[2] Al-Obaidi, M.A.; Zubo, R.H.A.; Rashid, F.L.; Dakkama, H.J.; Abd-Alhameed, R.; Mujtaba, I.M. Evaluation of Solar Energy Powered Seawater Desalination Processes: A Review. Energies 2022, 15(18), 6562.
[3] Dawoud, M.A.; Sallam, G.R.; Abdelrahman, M.A.; Emam, M. The Performance and Feasibility of Solar-Powered Desalination for Brackish Groundwater in Egypt. Sustainability 2024, 16, 1630.
[4] Tigrine, Z.; Aburideh, H.; Zioui, D.; Hout, S.; Sahraoui, N.; Benchoubane, Y.; Izem, A.; Tassalit, D.; Yahiaoui, F.Z.; Khateb, M.; Drouiche, N.; Lebouachera, S.E.I. Feasibility Study of a Reverse Osmosis Desalination Unit Powered by Photovoltaic Panels for a Sustainable Water Supply in Algeria. Sustainability 2023, 15, 14189.
[5] Mizyed, A. Solar PV System Design for Enhancing Sustainability in SWRO Desalination: The Deir El-Balah Case Study. New Energy Exploitation and Application 2025, 4(2), 251–262.
[6] Alghassab, M.A. A Review of Hybrid Solar Desalination Systems: Structure and Performance. Water Science and Technology 2024, 89(5), 1357–1381.
[7] Yusop, A.M.; Zakaria, M.H.; Mohd Sofi, M.N.A.; Sulaiman, N.A.; Yunus, S.A.M.J.; Mohamed, R. Eco-Friendly Desalination: Improving Evaporation Rates in a Solar Still Using Agricultural Waste Materials. International Journal of Energy and Water Resources 2025.
