Desolenator
XPRIZE Semi-finalist 2026
Selected from 650+ global applicants

One of 20 semi-finalists for the $119M XPRIZE Water Scarcity prize.

Desolenator produces ultrapure water at industrial scale using solar or waste heat thermal energy: no chemicals, no membranes, no toxic brine. Two active deployments in the UAE. Validated for 1000 m³/day.

Selected from 650+ global applicants

One of 20 semi-finalists for the $119M XPRIZE Water Scarcity prize.

Desolenator produces ultrapure water at industrial scale using solar or waste heat thermal energy: no chemicals, no membranes, no toxic brine. Two active deployments in the UAE. Validated for 1000 m³/day.

ISO 9001 CertifiedISO 14001 CertifiedISO 45001 CertifiedXPRIZE Semi-Finalist 2026BlueInvest 2026 WinnerEarth05 Next-Gen Circular Water Winner 2026Best Performing Company Tech Tour Water Tech 2025Gulf Deployments: OperationalWorld Economic Forum PartnerUnited Nations RecognisedWWF PartnerSolar Impulse FoundationBBC CoverageSprout Challenger50 2024ISO 9001 CertifiedISO 14001 CertifiedISO 45001 CertifiedXPRIZE Semi-Finalist 2026BlueInvest 2026 WinnerEarth05 Next-Gen Circular Water Winner 2026Best Performing Company Tech Tour Water Tech 2025Gulf Deployments: OperationalWorld Economic Forum PartnerUnited Nations RecognisedWWF PartnerSolar Impulse FoundationBBC CoverageSprout Challenger50 2024
ISO 9001 CertifiedISO 14001 CertifiedISO 45001 CertifiedXPRIZE Semi-Finalist 2026BlueInvest 2026 WinnerEarth05 Next-Gen Circular Water Winner 2026Best Performing Company Tech Tour Water Tech 2025Gulf Deployments: OperationalWorld Economic Forum PartnerUnited Nations RecognisedWWF PartnerSolar Impulse FoundationBBC CoverageSprout Challenger50 2024ISO 9001 CertifiedISO 14001 CertifiedISO 45001 CertifiedXPRIZE Semi-Finalist 2026BlueInvest 2026 WinnerEarth05 Next-Gen Circular Water Winner 2026Best Performing Company Tech Tour Water Tech 2025Gulf Deployments: OperationalWorld Economic Forum PartnerUnited Nations RecognisedWWF PartnerSolar Impulse FoundationBBC CoverageSprout Challenger50 2024
XPRIZE Water Scarcity

Recognised at global level

$119 M
prize pool

Desolenator is one of 20 semi-finalists selected from 674 competing teams in the XPRIZE Water Scarcity competition. Sponsored by the Mohamed bin Zayed Water Initiative, the five-year prize challenges teams to develop desalination systems capable of producing 1,000 m³ of clean water per day from seawater, reliably and at scale. Learn about the competition ↗

XPRIZE Water Scarcity

Recognised at global level

$119 M
prize pool

Desolenator is one of 20 semi-finalists selected from 674 competing teams in the XPRIZE Water Scarcity competition. Sponsored by the Mohamed bin Zayed Water Initiative, the five-year prize challenges teams to develop desalination systems capable of producing 1,000 m³ of clean water per day from seawater, reliably and at scale. Learn about the competition ↗

The Technology

Circular, resilient desalination. No inputs but seawater and sunlight or waste heat.

Desolenator uses solar thermal energy or low-grade industrial waste heat to evaporate saline or contaminated water and collect pure condensate. The output is high quality ultrapure water, free from contaminants. At a cost of: $1 USD per 1,000 litres.

No chemical inputs
No membrane replacement
No toxic brine discharge
No grid dependency
Circular, zero liquid discharge
40 m³
per hour, per unit
$1
per 1,000 litres
100%
solar powered
ISO
9001 / 14001 / 45001
Desolenator deployment in the Gulf desert
Silal Al Ain Innovation Oasis, Desalination plant delivering custom-remineralised desalinated water for Precision Agriculture. This plant was built for Silal, our Strategic Partner for Phase 2 of the XPRIZE Water Scarcity Competition.
The Technology

Circular, resilient desalination. No inputs but seawater and sunlight or waste heat.

Desolenator uses solar thermal energy or low-grade industrial waste heat to evaporate saline or contaminated water and collect pure condensate. The output is high quality ultrapure water, free from contaminants. At a cost of: $1 USD per 1,000 litres.

No chemical inputs
No membrane replacement
No toxic brine discharge
No grid dependency
Circular, zero liquid discharge
40 m³
per hour, per unit
$1
per 1,000 litres
100%
solar powered
ISO
9001 / 14001 / 45001
Desolenator deployment in the Gulf desert
Silal Al Ain Innovation Oasis, Desalination plant delivering custom-remineralised desalinated water for Precision Agriculture. This plant was built for Silal, our Strategic Partner for Phase 2 of the XPRIZE Water Scarcity Competition.
Being selected as an XPRIZE semi-finalist validates what we have proven in the field: that solar thermal desalination can deliver ultrapure water at a cost the world can actually afford. The prize is an accelerant. The technology is already working.
Adri Pols
Adri Pols · CEO, Desolenator
Being selected as an XPRIZE semi-finalist validates what we have proven in the field: that solar thermal desalination can deliver ultrapure water at a cost the world can actually afford. The prize is an accelerant. The technology is already working.
Adri Pols
Adri Pols · CEO, Desolenator
What Semi-Finalist Status Means

This is not an application. It is a verdict.

The $119M XPRIZE Water Scarcity competition does not select teams based on proposals or prototypes. Semi-finalist status is awarded only to organisations that have already demonstrated working technology at meaningful scale. Desolenator is one of 20 teams worldwide to have cleared that bar.

674 teams from across the world expressed interest in competing. XPRIZE evaluated technical approach, team capability, and evidence of real-world deployment potential. Desolenator entered with a working system already operating in the field.
Independent technical review A panel of independent scientists and engineers assessed each team's data, operational track record, and cost projections. Desolenator submitted evidence of a live pilot system producing water in the Abu Dhabi desert.
During XPRIZE qualification testing, Desolenator's system ran two tasks simultaneously: producing ultrapure water from high-salinity Gulf seawater for XPRIZE analysis, while converting saline groundwater into irrigation water at Silal's Innovation Oasis in Abu Dhabi. Real conditions. Uninterrupted.
In total 674 teams entered. 20 advance. Desolenator is one of them. This phase demands proof at scale: safe, affordable water for communities, agriculture, and industry where water is scarce. Desolenator's system was built for exactly that.
Teams meeting the final criteria share a $119M prize pool. Performance is independently verified across three measures: cost, quality, and volume. The target: 1,000 m³ per day, to WHO drinking water standards. Desolenator's modular architecture was designed to reach exactly that.
For investors and partners, semi-finalist status represents the most rigorous third-party validation available in the water technology sector today: independently assessed, publicly accountable, and backed by a $119M prize structure.
Desolenator validation visual 1
Desolenator validation visual 2
Desolenator has innovated a fundamentally different clean water supply architecture. The shift from centralized, energy-intensive desalination plants to distributed, energy-efficient solar or waste-heat-driven solutions to cost-competitively purify water is the structural change in approach that the potable-water-stressed and increasingly thirsty world needs now more so than ever. Reaching the top 20 globally reconfirms my conviction that this technology is ready to scale.
Paddy Padmanathan
Paddy Padmanathan · Chairman - Desolenator and Former President and CEO of ACWA
Desolenator has innovated a fundamentally different clean water supply architecture. The shift from centralized, energy-intensive desalination plants to distributed, energy-efficient solar or waste-heat-driven solutions to cost-competitively purify water is the structural change in approach that the potable-water-stressed and increasingly thirsty world needs now more so than ever. Reaching the top 20 globally reconfirms my conviction that this technology is ready to scale.
Paddy Padmanathan
Paddy Padmanathan · Chairman - Desolenator and Former President and CEO of ACWA
Whitepaper
Whitepaper cover
Innovation Spotlight · May 2026

Engineering the future of water.

Phase 02 · Complete · Semi-Finalists Announced

Desolenator has completed field testing for the XPRIZE Water Scarcity Competition and has been named one of 20 Semi-finalist teams worldwide. This whitepaper covers what that testing involved, and why the results matter.

674
Teams entered
20
Semi-finalists
Phase 2
Complete
Download whitepaper
Whitepaper
Whitepaper cover
Innovation Spotlight · May 2026

Engineering the future of water.

Phase 02 · Complete · Semi-Finalists Announced

Desolenator has completed field testing for the XPRIZE Water Scarcity Competition and has been named one of 20 Semi-finalist teams worldwide. This whitepaper covers what that testing involved, and why the results matter.

674
Teams entered
20
Semi-finalists
Phase 2
Complete
Download whitepaper
Whitepaper
Whitepaper cover
Innovation Spotlight · May 2026

Engineering the future of water.

Phase 02 · Complete · Semi-Finalists Announced

Desolenator has completed field testing for the XPRIZE Water Scarcity Competition and has been named one of 20 Semi-finalist teams worldwide. This whitepaper covers what that testing involved, and why the results matter.

674
Teams entered
20
Semi-finalists
Phase 2
Complete
Download whitepaper
Investors & Partners

Speak to our team

We are currently engaging with strategic investors and potential customers. If you are evaluating resilient infrastructure, water security, or industrial water supply opportunities, let's talk!

Get in touch →
Press & Media

Download press kit

High-resolution imagery, a whitepaper explaining our innovation, logo's, and approved quotes are available for editorial use. For interview requests, contact our communications team directly.

Download press kit →
Investors & Partners

Speak to our team

We are currently engaging with strategic investors and potential customers. If you are evaluating resilient infrastructure, water security, or industrial water supply opportunities, let's talk!

Get in touch →
Press & Media

Download press kit

High-resolution imagery, a whitepaper explaining our innovation, logo's, and approved quotes are available for editorial use. For interview requests, contact our communications team directly.

Download press kit →
As featured in & recognised by
BBCForbes Middle EastWorld Economic ForumUnited NationsWWFSolar Impulse Foundation
As featured in & recognised by
BBCForbes Middle EastWorld Economic ForumUnited NationsWWFSolar Impulse Foundation