A similar structure, a different asset
Gulf desalination is financed on the independent producer model: long-term offtake with a state-backed purchaser, capacity payments for availability, and project debt sized against that contract. On paper it resembles a power financing, and the documentation often descends from one.
The asset behaves differently, and three differences matter.
Storage is limited
Electricity cannot be stored economically at grid scale, which is why availability rather than dispatch drives power payments. Water can be stored, but only for days in most Gulf systems. That makes continuity of supply critical in a way that tolerates very little unplanned outage, and it puts weight on maintenance regimes and redundancy that a power plant's structure may treat more loosely.
Demand is non-discretionary
Municipal water demand does not fall in a downturn. That is a strength for the revenue line, and it means the political sensitivity of a supply interruption is higher than for most infrastructure. Termination and step-in provisions are drafted with that in mind — an offtaker will not accept a structure that could interrupt municipal water supply during a dispute.
Coupling with power
Many Gulf plants produce water and power together. Where a single project does both, the structure must handle two outputs with different measurement, availability standards, and potentially different offtakers. Decoupled plants — increasingly common as solar displaces thermal generation — simplify this but introduce an electricity purchase cost that becomes a significant input price to be indexed and hedged.
What lenders examine
- Availability standards and the redundancy that supports them, given limited storage
- Maintenance regime and reserve provisions, tested independently
- Step-in and termination mechanics that reflect the sensitivity of municipal supply
- For coupled plants, how availability and payment work across both outputs
- For decoupled plants, the power purchase arrangement and how its cost is passed through
The transition question
As desalination shifts toward reverse osmosis powered increasingly by renewables, the cost structure moves from fuel-intensive to electricity-intensive and capital-intensive. Financings written on thermal assumptions do not always translate. Where a project is being structured on precedent documentation, the precedent should be checked against the technology actually being built.
