The United Arab Emirates announced Tuesday $4.5 billion in clean energy investments in Africa during a landmark climate summit hosted by Kenya that is aimed at attracting funding for efforts to combat global warming.

"We will deploy $4.5 billion... to jumpstart a pipeline of bankable clean energy projects in this very important continent," said Sultan Al Jaber, who heads the government-owned renewable energy firm Masdar, the UAE's national oil company ADNOC and the COP28 climate talks.

Heads of state, and government and industry leaders, are among thousands of attendees at the Nairobi summit where Africa is promoting its potential as a clean energy powerhouse.

The Africa Climate Summit will be followed by the COP28 summit later this year in Dubai, which is expected to feature competing agendas for the world's energy future.

"If Africa loses, we all lose," warned Jaber, who is also the UAE's minister for industry and advanced technology.

He said the investment aimed "to develop 15 GW (gigawatts) of clean power by 2030" and "catalyse at least an additional $12.5 billion from multilateral, public and private sources".

As of 2022, the continent's renewable generation capacity was 56 gigawatts, according to the International Renewable Energy Agency.

The three-day event in Nairobi, which began Monday, is billed as bringing together African leaders to define a shared vision for green development on the diverse continent of 1.4 billion people.

On Tuesday, the summit will offer proposals to reform global financial structures that have resulted in only a tiny fraction of investments in climate solutions being directed towards Africa.

Jaber called for a "surgical intervention of the global financial architecture that was built for a different era", urging institutions to lower debt burdens.

Countries in Africa are hamstrung by mounting debt costs and a dearth of finance, and despite an abundance of natural resources just three percent of energy investments worldwide are made in the continent.