Press release
Solar Water Desalination Plant Market size to exceed $7.21 Billion by 2037 | Elemental Water Makers B.V., Water Office, ACCIONA, Harbin ROPV Industrial Co LTD, TotalEnergies SE
Solar Water Desalination Plant Market
The solar water desalination plant market is entering a period of accelerated adoption as nations confront escalating water scarcity, rising energy costs, and increasing pressure to transition toward sustainable infrastructure. Solar-powered desalination solutions-once considered experimental-are now maturing into commercially viable, scalable technologies capable of supplying freshwater to industrial hubs, coastal communities, and arid regions worldwide.
According to the latest industry assessment, the global market is valued at USD 3.03 billion in 2025 and is projected to reach USD 7.21 billion by 2037, expanding at a 7.4% CAGR during the forecast period. Growth is propelled by rising demand for clean water, stringent environmental regulations, and a global shift toward low-carbon desalination technologies.
Solar desalination plants utilize photovoltaic (PV) and solar thermal energy to power reverse osmosis, multi-effect distillation, and hybrid purification systems. This renewable-driven approach significantly reduces operational costs, carbon emissions, and dependency on fossil-fuel-powered desalination systems-making it an increasingly strategic option for governments, industries, and humanitarian organizations.
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Regional Performance Highlights
North America continues to be an early adopter of solar desalination technologies, driven by severe drought cycles across the western United States and the growing need for climate-resilient water systems. The U.S. is investing in community-scale solar desalination installations, industrial brine reduction facilities, and large-scale pilot projects integrating solar thermal energy. Canada, meanwhile, is exploring solar desalination for remote communities and mining regions where conventional water supply is limited.
Europe's market is strongly influenced by the EU's Green Deal and circular economy objectives. Southern European regions-including Spain, Greece, and Italy-are expanding solar desalination as part of their climate adaptation strategies. The region also leads in policy support for renewable water treatment, emphasizing low-emission desalination technologies for agriculture, tourism-dependent islands, and industrial water recycling.
Asia Pacific remains the fastest-growing and most influential region, projected to command 42% market share by 2037. Countries such as India, China, Australia, and Saudi Arabia (APAC classification in several industry models includes Middle East for desalination) are driving large-scale investments in solar-powered desalination due to extreme water stress and rapidly expanding industrial sectors. Government-led initiatives to deploy renewable-powered water infrastructure across deserts, coastal belts, and remote islands are accelerating demand across the region.
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Market Segmentation
The industrial segment accounts for 40% of the total demand, making it the largest beneficiary of solar desalination adoption. Industries such as oil & gas, chemicals, power generation, mining, data centers, and manufacturing are integrating solar desalination to secure a stable, cost-efficient water supply while reducing emissions and lowering operational expenses. Industrial players are increasingly opting for hybrid solar-RO systems to treat wastewater, manage brine discharge, and achieve high-recovery purification.
Solar-powered reverse osmosis (RO) dominates the technology landscape due to its high efficiency, modular design, and compatibility with both PV and concentrated solar power (CSP) systems. Solar RO solutions are widely adopted in coastal cities, rural communities, municipal utilities, and industrial estates. Their scalability-ranging from small 10 m3/day units to multi-million-liter plants-makes them particularly valuable in remote and off-grid environments.
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Top Market Trends
1. Rapid Adoption of Hybrid Solar-RO Systems
Hybrid systems combining photovoltaic power, battery storage, and energy-efficient RO membranes are becoming standard in new desalination projects. These systems optimize energy consumption, reduce intermittency challenges, and ensure 24/7 freshwater production.
Example:
Recent installations in the Middle East and India have deployed hybrid solar-RO plants that integrate next-generation energy recovery devices, reducing electricity usage by up to 40%.
2. Advancements in Solar Thermal Desalination Technologies
Solar thermal technologies-such as multi-effect distillation (MED) and solar stills-are experiencing a resurgence due to their ability to operate efficiently in high-temperature regions. Innovations in thermal collectors, heat transfer fluids, and storage systems have enhanced performance and scalability.
Recent event:
European consortiums have invested in next-generation solar thermal concentrator desalination facilities designed for island communities in the Mediterranean.
3. Digitalization and IoT Integration in Solar Desalination Plants
Digital monitoring is transforming plant performance. Smart sensors, AI-driven predictive maintenance, and remote monitoring systems are helping operators manage brine levels, membrane life cycles, and solar generation efficiency.
Example:
Several new deployments in Asia Pacific now include cloud-based dashboards and AI algorithms that dynamically adjust system output based on weather forecasts and water demand patterns.
4. Sustainability and Low-Carbon Water Infrastructure
Global water policies increasingly prioritize renewable-powered desalination to reduce carbon footprints and dependence on fossil fuels. Manufacturers are focusing on recyclable materials, low-energy membranes, and brine-minimization techniques.
Example:
Multiple ESG-driven industry initiatives are now promoting zero-liquid-discharge (ZLD) solar desalination systems for industrial wastewater reuse.
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Recent Company Developments
The competitive landscape features a mix of global desalination leaders, solar technology providers, and emerging innovators introducing cost-effective solutions. Below are notable developments from the last 12 months:
1. AquaSolar Technologies - Announced commercial deployment of modular solar RO units for rural water supply in Southeast Asia, supported by government-backed social infrastructure programs.
2. SolWave Water Solutions - Launched an advanced hybrid solar desalination plant with integrated battery storage to improve round-the-clock water production in industrial zones.
3. Veolia Environnement S.A. - Expanded its renewable-powered desalination portfolio, signing agreements to integrate solar fields into existing brine treatment facilities in the Middle East.
4. Abengoa - Re-entered the solar desalination market through new partnerships aimed at building CSP-powered desalination plants in North Africa.
5. Toray Industries, Inc. - Introduced highly efficient RO membranes designed specifically for solar-powered systems, improving energy recovery and reducing maintenance costs.
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Related News -
https://www.linkedin.com/pulse/what-trends-shape-future-high-frequency-solar-inverter-ouwsf
https://www.linkedin.com/pulse/how-renewable-energy-market-powering-global-transition-yrhmf
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