Dear Haider Niaz,

The general function of the electrolyse cell is to split water in the form of steam into pure H2 and O2. Steam is fed into the porous cathode. When a voltage is applied, the steam moves to the cathode-electrolyte interface and is reduced to form pure H2 and oxygen ions. The hydrogen gas then diffuses back up through the cathode and is collected at its surface as hydrogen fuel, while the oxygen ions are conducted through the dense electrolyte. The electrolyte must be dense enough that the steam and hydrogen gas cannot diffuse through and lead to the recombination of the H2 and O2−. At the electrolyte-anode interface, the oxygen ions are oxidized to form pure oxygen gas, which is collected at the surface of the anode.

And 1MW means that it generate the power of 1MW maximum.

This link will help you for more information.

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High Conductivity Membranes - For Alkaline Electrolyzers

Hope you understand about it, if any question feel free to ask me.

Thanks.

Dear Haider Niaz,

Normally, the power of an electrolyser refers to its electricity consumption.

(see, for example, page 6 of the datasheet https://etipwind.eu/wp-content/uploads/A2-Hydrogenics_v2.pdf or this one https://mcphy.com/en/our-products-and-solutions/electrolyzers/large-capacity/).

In this sense, 1 MW electrolyser uses 1 MWh per hour, and it is crucial to know the flow rate at this power to calculate the efficiency of the electrolyser (or the efficiency to calculate the flow rate). In the cases of the links above, for instance, considering that 1 Nm3 of H2 contains 3 kWh of energy (LHV) approx, you can easily check that the efficiencies of the electrolysers (depending on the model) can reach 60%.

When one says "we have a 1 MW solar plant capacity for the electrolyser", it means that the solar plant generates 1MW output direct power and we can "plug" up to 1MW of electrolyser(s). If we plug an electrolyser of 2 MW it will work at the half of its capacity. Of course, solar plants (and renewable power plants in general) won't produce 1 MW electricity steadily, therefore the size of the electrolysers to install requires to be optimised (economic optimization for instance).

I hope the answer goes in the same direction as your question.

Best,

Antonio

read this

http://www.hydrogenics.com/wp-content/uploads/Renewable-Hydrogen-Brochure.pdf

Agree with Antonio. The power is the applied volts times the current passing through it.

Thankyou, respected Zia Hameed Antonio Valente Tawfeeq Wasmi Mohammed Salih and Tony Maine for your answers. They helped in understanding my question.