What is the GH2S System?

The GH2S (Green Hydrogen Storage System) is a complete, standalone energy system that generates electricity from hydrogen gas produced using 100% renewable power. The system captures surplus renewable energy, uses it to produce hydrogen through electrolysis, stores that hydrogen in purpose-built tanks, and converts it back to electricity on demand via a fuel cell.

The result is reliable, independent electrical power — available whenever it is needed, regardless of whether the sun is shining or the wind is blowing. No grid connection required. No combustion. No emissions. The only byproduct is water vapour.

Green, Grey and Blue Hydrogen — What is the Difference?

Hydrogen is produced by several different methods. The terms “green”, “grey” and “blue” describe the production process and its environmental impact.

Green Hydrogen is produced using renewable electricity to split water into hydrogen and oxygen through a process called electrolysis. It produces no carbon emissions. This is the hydrogen used in the GH2S system.

Grey Hydrogen is produced from natural gas through steam methane reforming (SMR) — the most common industrial method. It releases significant CO₂ as a byproduct and is not considered environmentally sustainable.

Blue Hydrogen uses the same production method as grey hydrogen but incorporates carbon capture and storage (CCS) technology to prevent CO₂ from entering the atmosphere. It is a transitional option — less harmful than grey hydrogen, but not as clean as green hydrogen.

Ultra Energy’s GH2S system uses only green hydrogen, produced from water using clean renewable electricity.

The Components of a GH2S System

A complete GH2S system consists of five key components, working together as a closed energy loop.

Renewable Energy Source
The GH2S system is powered by any reliable source of clean electricity. Solar is the most practical choice across the UAE and the wider region, given the consistent levels of solar irradiance. Wind, nuclear, or other clean energy sources can also be used. The renewable energy source drives the electrolysis process.

Water
Water is the raw material for hydrogen production. It is plentiful, accessible, and completely safe — it produces no harmful byproducts when processed through the GH2S system. The electrolyser splits water into its two constituent elements: hydrogen (H₂) and oxygen (O₂).

Electrolyser
The electrolyser uses electrical power to split water into hydrogen and oxygen gas. It contains two electrodes — a cathode (negative charge) and an anode (positive charge) — submerged in water. The cathode attracts hydrogen and the anode attracts oxygen, separating the two gases cleanly. The hydrogen is captured and stored; the oxygen is released harmlessly into the atmosphere.

Storage Tanks
The hydrogen produced by the electrolyser is stored in purpose-built, high-pressure storage tanks. This stored hydrogen is the system’s energy reserve — available on demand at any time, regardless of current weather or generation conditions. Storage capacity can be scaled to match the specific energy requirements of the installation.

Fuel Cell
The fuel cell converts stored hydrogen back into electrical energy through an electrochemical reaction with oxygen from the air. The only byproduct is water vapour. Fuel cells produce electricity without combustion, without emissions, and without noise. The most widely used type in GH2S applications is the Proton Exchange Membrane (PEM) fuel cell, valued for its efficiency, compact size, and fast response to changing power demand.