From the Aral Sea to the Sahel: Off-Grid Desalination

Why this brief exists

By the mid-2020s, roughly three billion people were living in water-stressed regions, with Africa among the most exposed [1]. By 2050, projections from World Bank population data and the FAO AQUASTAT database indicate that approximately two billion people across 44 countries will face physical water scarcity, of whom 95% will live in developing countries [2]. The countries projected to be most acutely affected — Uganda, Burundi, Nigeria, Somalia, Malawi, Eritrea, Ethiopia, Haiti, Tanzania, Niger, Zimbabwe, Afghanistan, Sudan and Pakistan — have not established desalination capacity at any meaningful scale against their freshwater demand [2].

This is not a story about wealthy water-stressed nations adding desalination to an existing portfolio. Saudi Arabia, the United Arab Emirates, Israel, Spain and Singapore already operate desalination as an established component of their water-supply infrastructure. The story here is the second wave: regions where desalination is becoming necessary at exactly the moment when their electrical infrastructure is least prepared for it.

These regions span four continents and three categories of governance: ecological-disaster zones (the Aral Sea basin, parts of the Sahel), climate-displacement zones (coastal Bangladesh, eastern India) and small island developing states facing climate-amplified scarcity. What unites them is the architectural problem of running an electricity-intensive continuous process — reverse osmosis desalination — on power sources that were never designed for that duty cycle.

The global water stress map in 2026

Sub-Saharan Africa — progress constrained by demographic growth

Coverage in Sub-Saharan Africa is improving, but not fast enough to close the absolute deficit, and in sanitation the number of people without service is still rising. According to the 2025 Joint Monitoring Programme update from UNICEF and WHO, 281 million people in Eastern and Southern Africa alone lacked access to basic drinking water services in 2024, and 476 million lacked basic sanitation services [3]. Across Sub-Saharan Africa as a whole, 840 million people, or 68% of the population, had at least basic water services in 2024, against 587 million and 59% a decade earlier; in rural areas coverage stood at 53%, up from 44% in 2014 [3]. The regression is clearest in sanitation: because coverage has not kept pace with demographic growth, more people lacked basic sanitation in 2024 than in 2015, 803 million against 686 million [3]. Globally, 2.1 billion people still lacked safely managed drinking water in 2024 [4].

The drivers are structural. IPCC projections for Africa are strongly differentiated rather than uniform: drying is projected for parts of southern Africa and the coastal north, while parts of eastern and central Africa may receive more annual rainfall, with drought and precipitation extremes both increasing in different subregions [5]. The Sahel and the Horn of Africa face prolonged dry seasons and advancing desertification. The Great Green Wall initiative seeks to restore 100 million hectares of degraded land across the Sahel by 2030, while creating 10 million green jobs and strengthening climate resilience in participating countries [5]. In Somalia, five consecutive failed rainy seasons have left millions food insecure [5]. In Morocco, construction of desalination capacity for agriculture and municipal supply has become a national strategic priority [5]. The institutional response is fragmented across the African Development Bank, the World Bank, the Green Climate Fund, the African Union’s Africa Water Vision 2025 and bilateral donors [6].

South Asia — coastal salinity and climate displacement

The South Asian water crisis takes a different form. It is not the absence of water but its progressive contamination by salt as sea levels rise and tidal flooding pushes brackish water into coastal aquifers. Disasters triggered approximately 2.4 million internal displacements in Bangladesh during 2024, up by about 600,000 on the previous year and rising for the fourth consecutive year; the figure counts movements recorded during the year, not the stock of people remaining displaced at its end [7]. Separately, reporting from the Khulna region puts the share of the population displaced by climate-induced disasters at 18.5% in 2025, against 16.5% in 2021 [7].

The mechanism is documented in peer-reviewed work: salinity intrusion follows direct tidal flooding during the wet season, upward lateral migration during the dry season, and brackish inundation for shrimp farming [8]. In Bangladesh’s southwestern coastal region, approximately 50% of arable land on the exposed coasts is now affected by salinity, with rice yields declining 30–60% [9]. In some affected districts 70% of respondents report that climate-based stressors have degraded the quality of accessible drinking water [10]. What is required is not industrial-scale plants but thousands of distributed safe-water delivery points serving villages and small municipalities — a profile that maps poorly onto centralised utility models.

Central Asia — the Aral Sea basin as ecological frontline

The Aral Sea catastrophe is one of the most documented ecologically driven water-scarcity crises on Earth. Once the world’s fourth-largest lake, the Aral lost the great majority of its volume within decades after the Soviet Union diverted the Amu Darya and Syr Darya rivers for cotton irrigation [11]. The Aralkum desert formed on the exposed seabed covers approximately 60,000 km², nearly half of which lies in Karakalpakstan, home to about 1.8 million people [12]. According to the joint World Bank and Uzbekistan State Committee on Forestry study, dust storms originating from the Aralkum carry an estimated 15 to 75 million tonnes of sand, dust and salt annually across Central Asia, with documented economic damage to Karakalpakstan of over 44 million US dollars per year — about 2% of regional GDP [12].

The crisis is multi-country. The Aral Sea drainage basin extends across Afghanistan, Iran, Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan and Uzbekistan, with the Amu Darya and Syr Darya feeding what remains [11]. Karakalpakstan — Uzbekistan’s autonomous republic on the southern shore — is the region most severely affected. Its capital, Nukus, is regularly enveloped by dust storms originating from the exposed seabed.

Two developments distinguish 2025–2026 as a turning point. At the 88th meeting of the Interstate Commission for Water Coordination, held in Dushanbe in January 2025, Kazakhstan, Uzbekistan, Tajikistan and Turkmenistan agreed seasonal allocations under which around 11 billion cubic metres was expected to reach Kazakhstan through the Syr Darya system, including 1.6 billion cubic metres intended for the Aral Sea [13]. Afghanistan’s Qosh-Tepa Canal is a material emerging variable in the Amu Darya water balance. Estimates of its eventual downstream impact vary substantially and depend on the completed diversion capacity, the operating regime and wider basin conditions; the sharpest scenarios are cited for parts of Turkmenistan [14].

The institutional response is multi-donor. The Asian Development Bank approved a 150 million US dollar loan to Uzbekistan for climate-adaptive water resources management in the Aral Sea basin in August 2022, with the project running to 2030; as of August 2026 contract awards stood at about 59.5 million US dollars and disbursement at about 22.7 million, so the programme is in execution rather than at commitment stage [15]. In 2025 the European Union announced a project in Uzbekistan to restore land around the lower Aral Sea [15]. China is assisting Uzbekistan through scientific collaboration and water-saving technology [15]. Japan partners with UNDP and the Government of Uzbekistan on a comprehensive Aral Sea Water Project that explicitly includes renewable energy-powered desalination solutions in its scope [16]. UNDP’s procurement record for the region includes RFQ/047/22 of August 2022, for the supply of reverse osmosis systems to sites in Karakalpakstan [17].

Few water-stressed regions combine these four structural conditions as clearly as the Aral Sea basin in 2025–2026: severe ecologically driven scarcity, saline groundwater contamination, weak rural electrical infrastructure, and active institutional financing across UN, multilateral and bilateral channels — with explicit regional support in Karakalpakstan for renewable-energy-powered water solutions.

Middle East and North Africa — existing infrastructure under decarbonisation pressure

MENA presents a different problem. Desalination is already deeply embedded, with regional capacity concentrated in Saudi Arabia, the United Arab Emirates, Kuwait, Algeria and Libya, and with electricity demand for desalination forming a material component of national load [18]. The strategic question is therefore not whether to build desalination but how to decarbonise the existing fleet. Saudi Arabia’s Vision 2030 and the NEOM development integrate desalination with large-scale solar and renewable-energy programmes across the Gulf. State-backed investors, utilities and infrastructure developers play a major role in the regional desalination and renewable-energy pipeline, including groups such as ACWA Power and TAQA.

Small island developing states — Caribbean and Pacific

For small island developing states, water scarcity intersects with grid isolation. The Caribbean Community has set a regional target of 47% renewable energy contribution to total electricity generation by 2027 [19]. Separately, IRENA estimates that Caribbean islands need roughly 4 GW of additional renewable capacity and about 9 billion US dollars of investment to meet their nationally determined contributions [19]. Pacific states face a parallel challenge: approximately 5.9 billion US dollars is required to meet targets aligned with nationally determined contributions, with 1.8 GW of additional capacity needed [20]. The IRENA SIDS Lighthouses Initiative, coordinated and facilitated by IRENA, provides policy, technical-advisory, project-facilitation and access-to-finance support; a documented case is Saint Vincent and the Grenadines, where solar-powered reverse osmosis on the outer island of Bequia produces approximately 34,560 gallons of potable water for approximately 1,000 inhabitants [21].

The South Tarawa Water Supply Project in Kiribati (Green Climate Fund reference FP091) is a 58.1 million US dollar project combining a 28.6 million US dollar GCF grant with 29.45 million US dollars of co-financing, with the Asian Development Bank serving as the accredited entity for the project, funding a seawater desalination plant whose energy consumption is to be largely offset by a new solar photovoltaic plant [22]. For the Republic of the Marshall Islands, the GCF has approved 18.6 million US dollars for adaptation to drought and water scarcity, implemented through UNDP and the national government; that programme is centred on rainwater harvesting, storage, groundwater protection and water governance rather than desalination, and stands here as a water-resilience financing precedent [22].

Latin America — mining, urban supply and the Atacama corridor

Chile is the most advanced case of industrial-scale off-take desalination. Antofagasta Minerals inaugurated the 400-litre-per-second Punta Chungo desalination plant serving Los Pelambres in March 2024, as part of the mine’s Phase 1 Expansion programme, reported at above 2 billion US dollars; a subsequent project is doubling desalination capacity to 800 litres per second [23]. In March 2025 Antofagasta became the first Chilean city, and the first in Latin America above 500,000 inhabitants, supplied entirely from desalinated seawater, following an expansion of the Planta Desaladora Norte to 1,436 litres per second that also covers Mejillones [23]. The national projection for 2025–2034 puts the seawater share of copper-mining water consumption at 67.6% in 2034, against 40.7% in 2024, with roughly three quarters of that seawater supply desalinated and with the associated energy requirements and critical-infrastructure dependencies named explicitly [24]. The supporting water infrastructure is non-trivial: by 2021 nine desalination plants and three seawater impulsion systems were operational along the Chilean coast, with pipelines up to 42 inches in diameter rising to 3,200 metres above sea level through four high-pressure pumping stations [25]. Climate-resilience modelling shows central Chile and the eastern Mediterranean among regions where water gaps expand sharply under 3°C warming scenarios [26].

The Aral Sea basin: anchor case

Because the Aral Sea basin combines the broadest range of structural conditions that drive demand for off-grid desalination, it warrants direct treatment as the anchor case of this brief.

What happened to the Aral Sea

From the 1960s, large-scale Soviet irrigation projects in Uzbekistan, Turkmenistan and Kazakhstan diverted the Amu Darya and Syr Darya rivers for cotton and rice cultivation [27]. The Aral Sea, which depended on these rivers, began shrinking immediately. By 2004 the sea had divided into four separate water bodies; the resulting Aralkum desert on the exposed seabed now spans approximately 60,000 km² [12]. The broader basin covers roughly 1.5 million square kilometres across Central Asia and adjoining upstream territories, but the sea itself has effectively functioned as a vanishing system since the 1990s.

Karakalpakstan today

Karakalpakstan, an autonomous republic in northwestern Uzbekistan, hosts approximately 1.8 million people, nearly half of whom live within or adjacent to the Aralkum dust-storm footprint [12]. Its capital, Nukus, sits at the front line of the exposed-seabed dust storm phenomenon. The local population reports water scarcity, land degradation and outdated irrigation infrastructure as daily realities directly affecting livelihoods and food security [16].

The Karakalpakstan Council of Ministers has publicly committed to comprehensive water management transformation. According to statements from Deputy Chairman Vladimir Jollibekov, the regional government is supporting practical innovations including rehabilitation of irrigation networks, precision agriculture technologies, wastewater reuse systems and renewable energy-powered desalination solutions [16] — the exact technical profile this brief addresses.

Institutional response: the convergence of donors

What distinguishes the Aral basin in 2025–2026 is the simultaneous engagement of all major institutional channels.

• United Nations system. UNDP, in partnership with the Government of Uzbekistan and the Government of Japan, is implementing the Aral Sea Water Project covering Karakalpakstan, with desalination explicitly in scope [16]. UNDP procurement for the region includes RFQ/047/22 for reverse osmosis systems delivered to Karakalpakstan sites [17].
• Multilateral development banks. The ADB water resources management loan to Uzbekistan supports infrastructure renewal in the basin [15]. The World Bank funds parallel landscape-restoration work in Kazakhstan, including afforestation of the dried Aral seabed [43], and, through its joint study with the Uzbekistan State Committee on Forestry, has documented the economic case for landscape restoration of the Aralkum [12].
• European Union. A 2025 EU project supports land restoration around the lower Aral, environmental improvements and community livelihoods [15].
• China. Bilateral scientific and water-technology cooperation with Uzbekistan [15].
• Intergovernmental coordination. The International Fund for Saving the Aral Sea, established in 1993, and the Interstate Commission for Water Coordination in Central Asia, established in 1992, provide long-running regional coordination on water and environmental management in the Aral Sea basin [41].
• Bilateral coordination. The 2024 Intergovernmental Agreement between Kazakhstan and Uzbekistan on Cooperation in Ecology and Environmental Protection provides a legal framework for joint action on the basin [29].

The 2025–2026 turning point

Three concurrent developments make the present moment structurally distinct. First, the January 2025 allocation agreement includes 1.6 billion cubic metres intended for the Aral Sea [13]. Second, construction of Afghanistan’s Qosh-Tepa Canal has accelerated under the current government in Kabul, and the scale of its eventual effect on the Amu Darya remains scenario-dependent rather than settled. Afghanistan’s absence from regional water-sharing agreements creates a legal vacuum that existing intergovernmental mechanisms cannot fill [14]. Third, acute water stress in Turkmenistan is now expected in the Ahal and Mary regions for 2026, where pasture degradation and limited irrigation are reducing livestock numbers and grain yields. The Turkmen government has begun dredging the Karakum Canal and constructing small desalination plants as a partial response [14].

These developments mean that demand for distributed, renewable-powered desalination across the basin is reflected in active institutional commitments — most directly in the UNDP, Japan and Uzbekistan Aral Sea Water Project, which explicitly includes renewable-energy-powered desalination in its scope, and in the published Karakalpakstan reverse-osmosis procurement documentation [16] [17].

Why existing solutions fall short

The technical challenge for remote desalination is not the desalination process itself. Modern seawater reverse osmosis is mature: peer-reviewed comprehensive reviews place current energy consumption typically in the 3–6 kWh/m³ range with modern energy recovery devices, against thermal processes at up to 25 kWh/m³ thermal-equivalent [30]. The DESALRO 2.0 installation reported a specific energy consumption of 1.794 kWh/m³ for a 2,500 m³/day system, measured at the Canary Islands Institute of Technology in February 2025 and published in peer-reviewed form in 2026 [31]. Brackish water reverse osmosis consumes substantially less. The membrane and energy-recovery technology pool is dense, with multiple competitive Tier-1 original equipment manufacturers supplying it.

The challenge is electrical continuity. According to industry market analysis based on Global Water Intelligence and IDA Yearbook data, reverse osmosis represents approximately 70% of global desalination capacity in 2024, with continued substitution of thermal processes [32]. Energy is a dominant operating-cost component across the technology mix, and where the local electrical environment cannot deliver continuous power, every option for closing the gap has documented limitations.

Diesel-powered desalination

Diesel gensets remain the default off-grid power source globally. They provide controllable output and are well understood. Their disadvantages scale poorly with distance from supply chains: fuel transport costs to remote sites are high, maintenance is operationally intensive, and exposure to global fuel price volatility makes long-term cost forecasting difficult. At sites far from the road network, delivered water costs rise steeply, and the gap against the technical cost of producing water on site widens with distance; the size of that gap is site-specific and is not generalised here.

Solar photovoltaics plus battery storage

Solar photovoltaics are the natural pairing with off-grid desalination in sun-rich regions. The architectural problem is that reverse osmosis membranes are designed for continuous operation at design pressures. Renewable variability — diurnal solar cycles, cloud passages, seasonal shifts — introduces start-stop cycles that the membrane was not engineered for.

Peer-reviewed work in Desalination and the Journal of Membrane Science has documented this systematically, and the conditions matter. Repeated shutdown cycling did not by itself destroy membrane integrity in the reported test series; integrity loss appeared in specific configurations, notably enhanced osmotic backwash with controlled permeate backpressure, and with sudden spontaneous restart [33]. The outcome is highly sensitive to whether the operator can sustain mitigation protocols. Experimental work in Water records worst-case water permeability decreases of 37%, salt rejection decreases of 18% and membrane resistance increases of 37% under highly variable cloudy-day conditions without rinsing [34]. Separately, Freire-Gormaly and Bilton found that anti-scalant use combined with clean-water rinsing before shutdown preserved membrane permeability above 70% of the initial value after seven days of intermittent operation [42]. Performance therefore depends on whether site operations can sustain the required mitigation discipline at scale.

Battery storage and pressure accumulators provide partial buffering. However, authors in Desalination (2024) state the limit explicitly: conventional energy buffering, whether electrical through batteries or supercapacitors or mechanical through pressure accumulators, is temporary in nature and does not by itself guarantee the elimination of pump shutdowns under sufficiently rapid generation swings [35]. The peer-reviewed literature recognises this as an open problem.

Grid extension

In principle, extending the high-voltage grid to a remote desalination site solves the continuity problem. In practice the economics depend on voltage class, load, terrain, right of way, transformer requirements and local construction cost, and there is no single distance at which the case fails. For islands, polar coastal sites and many mining zones, grid extension is in practice not the route taken.

Water trucking and bottled water

For populations of a few hundred or a few thousand, water trucking and bottled water remain default solutions. Both carry a recurring cost that scales with volume and distance while an on-site plant carries a capital cost that does not; whether and when the two cross over is a site-level calculation and is not asserted here. Their continued use reflects the fact that technically and financially viable on-site alternatives are not available in every location.

Reverse osmosis desalination itself is mature. In remote deployment, electrical continuity is one of the principal remaining constraints, alongside pretreatment, feedwater chemistry, brine handling and operator capacity.

Continuous power for remote desalination

Modern reverse osmosis systems already work. They are mature, deployed worldwide and supplied by established Tier-1 original equipment manufacturers. The unresolved challenge in remote and infrastructure-poor regions is not the desalination technology itself — it is stable, uninterrupted operation in the electrical environments where these systems have to run.

Remote desalination sites typically depend on unstable electrical environments: intermittent renewable generation, weak rural grids, isolated microgrids and expensive diesel logistics. This creates operational instability for continuous-process equipment such as reverse osmosis membranes and high-pressure pumping systems. Electrical instability can contribute to membrane permeability loss, fouling-related operational stress and reduced plant availability where it produces repeated shutdowns, restarts or pressure transients. The underlying mismatch is structural: process equipment that needs uninterrupted operation is being asked to run on power that was not engineered to deliver it.

VENDOR.Max is being developed for infrastructure applications in which electrical continuity is a system requirement. Its intended deployment role is on the electrical side of water-treatment infrastructure rather than in water treatment itself; field performance in desalination environments has not been established. The platform is designed to be integrated alongside existing desalination equipment, battery storage systems, renewable generation and hybrid energy deployments.

Where this fits in the deployment stack

At a typical remote-desalination site, VENDOR.Max is intended to sit on the electrical layer supporting the process equipment — the high-pressure pumping system, the energy recovery device, the reverse osmosis membrane modules. Renewables, batteries, gensets and the local grid, where present, continue to operate in their established roles. The deployment role under development is addressed to sites where the surrounding energy ecosystem is intermittent or weak; no operating result at such a site is claimed on this page.

Technical documentation

The architecture, validation status and engineering classification of VENDOR.Max are documented across the technology section of this site rather than inside this brief. Readers looking for technical depth should follow the dedicated pages.

• VENDOR.Max product page — architectural overview at the product level.
• How VENDOR.Max works — the staged architecture and engineering classification.
• Where the energy comes from — source attribution, field-transfer mechanism and the transition from charge flow to measurable power.
• Technology validation — complete device boundary, channel inventory and the independent verification protocol.
• Endurance test record — extended internal endurance characterisation under controlled laboratory conditions.
• Patent portfolio — jurisdictional coverage of the patent family.
• Utility and water operations — deployment fit for substation auxiliary supply and water operations.

Development stage

Field validation in water-infrastructure contexts is a defined stage of the programme and is not claimed on this page. It would require integration testing with representative desalination equipment, storage and site electrical infrastructure; no field partner is asserted here. Patent protection: WO2024209235A1 (Published), ES2950176B2 (Granted), EP4693872A1 (Under examination), US20260088633A1 (Under examination), CN119096463A (Under examination), IN 202547010911 (Under examination). Trademark: EUTM 019220462 (Registered). Project stage: TRL 4 — Prototype Rebuild After Relocation.

Funding pathways: who pays for remote desalination in 2026

The financial architecture for off-grid desalination in water-stressed regions in 2026 spans multiple parallel channels. Understanding which channel applies to which geography determines feasibility.

Climate adaptation finance

The Green Climate Fund is the world’s largest dedicated climate fund and a major provider of adaptation finance, with an active water-security portfolio. Active GCF water projects in the Pacific include the South Tarawa Water Supply Project in Kiribati and adaptation financing for the Marshall Islands, implemented through UNDP [22]. In the Caribbean and Pacific, GCF project finance operates alongside IRENA’s SIDS Lighthouses Initiative, which provides policy, technical-advisory, project-facilitation and access-to-finance support [21].

Multilateral development banks

• World Bank Water Global Practice maintains country water portfolios across all priority geographies covered in this brief, with particularly active engagement in Bangladesh, Sub-Saharan Africa, Egypt and Central Asia, including the joint Aralkum landscape-restoration study with the Uzbekistan State Committee on Forestry [12].
• Asian Development Bank funds the Aral Sea basin water resources management loan to Uzbekistan [15] and serves as co-financier with the GCF on the South Tarawa desalination project in Kiribati [22].
• African Development Bank operates the African Water Facility and aligns with the African Water Vision 2025 framework [6].
• European Bank for Reconstruction and Development operates municipal water modernisation across Central Asia and the MENA southern rim.

EU Global Gateway and sovereign programmes

The EU Global Gateway investment strategy includes water infrastructure as a priority pillar covering Africa, Central Asia, Latin America and the Indo-Pacific. The Team Europe Initiative consolidates EU institutional resources with member-state bilateral instruments including KfW, AFD, AECID, FMO and BIO Invest. For Central Asia specifically, the Team Europe Initiative on Water, Energy and Climate Change supports regional cooperation on water security, energy transition and climate resilience under the EU Global Gateway framework, and includes support to the International Fund for Saving the Aral Sea [40].

Sovereign and national programmes complete the channel map. Saudi Arabia, the UAE and Qatar deploy sovereign wealth and state water companies through corporate vehicles. Chile’s national water and mining policy frameworks support both municipal and industrial off-take desalination. Morocco’s national desalination strategy positions the technology as strategic agricultural and municipal water supply for the next two decades. Australia’s National Water Grid Fund can support eligible regional and remote water infrastructure projects, including First Nations programmes [36]. In the United States, WaterSMART grants administered by the Bureau of Reclamation, Bipartisan Infrastructure Law allocations, and Department of Energy Water Security Grand Challenge research funding through the National Alliance for Water Innovation provide the principal federal pathway [37].

Corporate venture and family office

For technology developers approaching pre-pilot deployment, the capital structure typically combines corporate venture arms of Tier-1 manufacturers and large utilities, deep-tech venture capital, and selected family office allocations from groups with infrastructure and water-resilience theses. EU-level instruments combine grant and investment components depending on the programme. The European Innovation Council Accelerator includes both grant and equity components, while LIFE and Horizon Europe run grant-based calls relevant to water and climate technologies.

Business demand by sector

The demand profile across sectors varies sharply in capital ticket size, decision-cycle length, and the operational pain that motivates the procurement.

Municipal utilities under weak-grid and water-stress conditions

Coastal municipalities in Sub-Saharan Africa such as Dakar, Lagos, Maputo, Mombasa and Dar es Salaam, the secondary cities of South Asia’s deltas, Caribbean and Pacific island utilities, and Arctic coastal settlements share one underlying procurement question: how to deliver a reliable water tariff under regulatory caps while securing long-term operational continuity where the upstream grid is unreliable or absent.

Mining off-take

The Chilean copper sector defines a Tier-1 industrial off-take pattern, with large desalination and seawater-conveyance projects embedded in broader mine-infrastructure programmes [23] [24]. Parallel development is occurring in Australian iron ore, lithium in Argentina and Chile, copper in Peru and the Democratic Republic of Congo, and gold across Sub-Saharan Africa. The decision pattern runs through Tier-1 engineering, procurement and construction contractors and corporate procurement at the operator level.

Agro-industrial

Morocco, Tunisia, Algeria, southeastern Spain, southern California and northern Australia all have established agricultural sectors increasingly dependent on either desalinated or recycled water. Guaranteeing crop water against worsening drought patterns has become an explicit board-level concern across these markets.

Hospitality and resort

The Maldives, Caribbean island resorts, Greek islands, Seychelles, Madagascar and remote coastal lodges share a common profile: water-supply cost is a meaningful operating expense, guest experience depends on water availability, and environmental certification standards increasingly require demonstration of local water resilience. Capital tickets for distributed installations in this segment typically fall in the small-to-mid-size range and are documented across multiple IRENA deployment cases [38].

Humanitarian and refugee operations

The Sahel, the Horn of Africa, the Bangladesh-Myanmar border, the Syria-Jordan corridor and conflict-affected regions of Sudan, Yemen and the Democratic Republic of Congo represent a distinct demand profile coordinated through UNHCR water, sanitation and hygiene guidelines, ICRC water and habitat operations, OCHA and UNICEF programmes. The decision driver is speed of deployment combined with operational resilience under volatile security conditions.

Green hydrogen and Power-to-X

A new demand profile has emerged with the green hydrogen pipeline. Production of green hydrogen via electrolysis requires demineralised water. According to peer-reviewed techno-economic modelling, dedicated desalination capacity required for hydrogen at industrial scale produces a water demand of approximately 0.33 m³ per MWh of hydrogen on a lower heating value basis [39]. National hydrogen strategies and project pipelines in Namibia, Mauritania, Morocco, Chile, Australia and Saudi Arabia include large coastal hydrogen developments in which dedicated water supply, and in some cases desalination, forms part of the infrastructure stack.

Data centres and compute in water-stressed locations

Hyperscale compute infrastructure is increasingly being sited in coastal and arid locations where evaporative cooling water is locally constrained — Arizona, Chile, parts of Saudi Arabia and parts of the Mediterranean. The water, energy and compute nexus is converging: training and inference clusters, cooling water requirements, coastal data-centre deployments and weak coastal grids in the same geographies now overlap with desalination-demand zones. This demand profile is still nascent in 2026 but is becoming increasingly relevant where compute infrastructure, water constraints and on-site water treatment intersect. Where on-site desalination intersects with compute, the underlying electrical-continuity constraint is the same as in remote municipal deployment, only at substantially higher load density.

Common misconceptions

Four formulations recur frequently in industry conversations about off-grid desalination, and each merits an explicit correction.

“Solar plus battery storage is sufficient for off-grid desalination”

It improves over diesel-only configurations, but the peer-reviewed literature documents that conventional energy buffering through batteries, supercapacitors or pressure accumulators is temporary in nature and does not by itself guarantee the elimination of pump shutdowns under variable conditions [35]. The outcome depends on mitigation discipline such as rinsing and anti-scalant dosing, and at sites where this discipline cannot be sustained, documented membrane impacts accumulate. This is the category of problem that continuous-power infrastructure is intended to address at the deployment level, as a distinct question from adding further buffering capacity.

“Desalination only matters for rich Gulf states”

That framing no longer describes the current market. Reverse osmosis represents approximately 70% of global desalination capacity in 2024 [32], and the geographic distribution has shifted decisively. Chile, Morocco, Israel, Singapore, Spain, Australia and a growing range of island states and Sub-Saharan coastal cities now operate or are commissioning desalination as an established component of water-supply infrastructure. Regions of particular relevance to this brief in 2026 include Sub-Saharan Africa, South Asia, Central Asia and the small island developing states.

“Continuous-power infrastructure competes with battery energy storage”

It does not. Battery storage addresses energy shifting and reserve over finite time windows, and that function is well established. The deployment role being investigated for VENDOR.Max is different: support of infrastructure whose operating requirement is continuity rather than energy shifting alone. The two architectures are therefore being evaluated as complementary rather than mutually exclusive, and the battery storage supplier is a partner rather than a competitor.

“Off-grid desalination is a one-size-fits-all problem”

It is not. The demand profile in coastal Bangladesh, with thousands of distributed small-volume installations for villages, is structurally different from Chilean mining, with single large-volume installations and long-distance high-altitude pumping; from island states, with modular installations sized for small populations; and from green hydrogen export hubs, where large-scale hydrogen projects require dedicated water-supply infrastructure of their own. The deployment topology adapts to scale, but the financing channel and partner architecture must be matched to each profile.