# DEWA Completes Final 250 MW Commissioning Tests at Hatta Pumped Storage Hydro Plant

> Dubai Electricity and Water Authority (DEWA) has achieved 99% completion on the 250 MW Hatta pumped-storage hydroelectric plant following synchronization to the 132 kV grid.

- **Source date:** 2026-10-01
- **Original source:** [Dubai Electricity and Water Authority Press Release](https://www.dewa.gov.ae/en/about-us/media-publications/latest-news/2026/10/hatta-pumped-storage-tests)
- **Reading time:** 1 min
- **Language:** en
- **URL:** https://voltformer.com/news/dewa-completes-99-percent-hatta-pumped-storage-hydro-tests-october-2026
- **Markdown:** https://voltformer.com/news/dewa-completes-99-percent-hatta-pumped-storage-hydro-tests-october-2026.md

## Hydro Turbine Fast Response

The plant uses 2 reversible pump-turbines capable of ramping to 250 MW full generating capacity within 90 seconds to supply the 132 kV network.

Fast start-up capability provides emergency backup and critical spinning reserve to support intermittent solar dispatch from desert photovoltaic plants.

## Storage Capacity and Mountain Reservoir Integration

The facility provides 1500 MWh of storage capacity by circulating water between 2 reservoirs with automated gate controls.

Advanced underground penstock monitoring systems ensure civil safety and optimal hydraulic dispatch efficiency.

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