H₂ por Eletrólise

~50 kWh/kg H₂.
Created by
Renato Passos, Eng. de Software
Reviewed by
Renato Passos, Eng. de Software

Last updated: Apr 18, 2026

kWh
500

About this calculator

The hydrogen electrolysis calculator is an essential tool for understanding the energy efficiency in hydrogen production. Electrolysis is a process that uses electrical energy to split water molecules into hydrogen and oxygen. Producing 1 kg of hydrogen requires approximately 50 kWh of electrical energy. This value can vary depending on the equipment efficiency and operational conditions.

The formula used is based on the relationship between the consumed electrical energy and the produced hydrogen amount. Process efficiency is crucial as it directly influences the required energy amount. Generally, electrolysis can be performed using renewable energy sources, such as solar or wind power, making it a promising option for clean hydrogen production.

The calculator is useful in cases where it is necessary to estimate the required energy for hydrogen production at different scales, from laboratory applications to industrial plants. It also helps evaluate the feasibility of projects involving hydrogen production as an energy vector.

It is essential to pay attention to the units of measurement and equipment efficiency, as these factors can significantly affect the results. Correct interpretation of the values obtained with the calculator is crucial for making informed decisions in hydrogen production projects.

Frequently asked questions

What is electrolysis?

Electrolysis is a process that uses electrical energy to split water molecules into hydrogen and oxygen.

How many kWh are needed to produce 1 kg of hydrogen?

Approximately 50 kWh.

Does equipment efficiency affect the result?

Yes, equipment efficiency directly influences the required energy amount.

Can I use renewable energy sources for electrolysis?

Yes, renewable energy sources like solar or wind power are suitable.

Is the calculator suitable for industrial-scale projects?

Yes, it can be used to estimate the required energy at different production scales.

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