A Nigerian man, Emeka Nelson, successfully built a generator which operates mainly on water.
Nelson invented the water-powered generator despite lacking formal education or engineering certification.
The inventor said the generator has a maximum capacity of 1000 Watts and a voltage ranging between 220 and 240.
It also has the potential to challenge conventional power-generating methods in Nigeria.
He disclosed the generator has powered his 2-bedroom apartment.
According to him, a litre of clean water can power the generator and supply energy for six hours.
He also added that he worked on the project for 16 years.
Nelson said his invention is environmentally friendly and also addresses safety concerns associated with traditional gasoline generators.
Speaking about the passion behind the invention, he said he lost a friend at the age of 12 as a result of a generator fumes incident.
This drove him to work diligently until he developed an alternative to the use of gasoline generators.
The BBC had met and interviewed him some years ago: