In this cycle, the excess electricity produced after consumption by devices connected to the system, is used to power an electrolyzer.
The fuel cell combines hydrogen and oxygen, generating electricity and producing only water vapor as a byproduct.
These solar have been incorporated since 1972[4] for hydrogen production[5] and is capable of directly converting sunlight into chemical energy.
An aqueous solution of hydrogen iodide has been proposed as an alternative to water as a fuel that can be used in this cycle.
[4] Clean Energy Source: The solar-hydrogen cycle is a pollution-free process, with water vapor being the only byproduct from the fuel cell.