Business India ×
 Climate Change

Renewable Energy
Published on: Dec. 8, 2021, 1:11 p.m.
The days of rooftop Hydrogen
  • The idea of ‘rooftop hydrogen’ becomes very, very real

By Business India Editorial

Gone are the days of rooftop solar. In the near future, we are going to see rooftop hydrogen, if we are to believe what the scientific community and industry experts are saying.

Storing solar electricity in batteries has been an expensive proposition, though the sharp fall in battery costs is promising. Since the world is moving swiftly into hydrogen, there is an alternative for the batteries. One could make use of the electricity from the rooftop solar plant to split water right on the roof to produce hydrogen. There are emergent technologies that are making possible photolysis – splitting water directly using sunlight, without the interface of electricity – using photoelectrochemical cells (PEC).

Prof Aravind Kumar Chandiran, who heads the Solar Energy Research Group at IIT Madras, has said that they have developed “a new material” that can be used to split water under sunlight. Prof Mohammed Qureshi of IIT Guwahati has said recently that his team developed a catalyst that, when used as a ‘photoanode’, can split water into hydrogen and oxygen. 

Prof Qureshi feels that it would be too early to comment whether this could be downsized for a rooftop plant, but many others in the academia and industry feel small-sized hydrogen generators will be ubiquitous in the future.

Even if you want to keep aside technologies for splitting water directly from sunlight and look only at conventional electrolysis, there is plenty of evidence to indicate that small-scale hydrogen plants are arriving.

“Fundamental physics says that these are technologies where size does not matter,” says Arne Ballantine, CEO and co-founder of Ohmium, a US-headquartered company that has started producing electrolysers from Bengaluru.

“Yes, the idea of ‘rooftop hydrogen’ becomes very, very real,” Ballantine said, adding, “We are moving past the world of chemical plants where the most efficient way to make hydrogen was with a huge installation.”


E-vehicles

The bike has been designed for travelling on both trails and roadways

Matter launches e-bikes

Published on Nov. 23, 2022, 2:09 p.m.

The bike has been designed for travelling on both trails and roadways

Population

Regions that have more people do not necessarily emit more carbon

Demystifying population woes

Published on Nov. 23, 2022, 1:51 p.m.

Regions that have more people do not necessarily emit more carbon

Funding

Clean Electric gets a funding boost

Clean Electric raises $2.2 million

Published on Nov. 23, 2022, 1:24 p.m.

Clean Electric gets a funding boost

Finance

Banks have increased their lending to EV purchases

Banking on green

Published on Nov. 23, 2022, 1 p.m.

Banks have increased their lending to EV purchases

E-MAGAZINE

Company Feature

Classrooms go live, thanks to Airtel

Published on April 5, 2022, 11:25 a.m.

Despite the pandemic, Bharti Foundation has ensured that children are not deprived of learning opportunities

Column

Collaborative excellence

Published on April 4, 2022, 8:53 p.m.

A policy perspective for meeting SDG-9 in low resource setting of developing economies

Column

Innovation and infrastructure

Published on April 4, 2022, 8:10 p.m.

India is well-positioned to become a model of corporate sustainability

Column

‘More for less’

Published on April 1, 2022, 10:12 p.m.

The merger of technology and SDGs – A game-changing win of the era