Reputex has released its Future Energy Index Series ahead of forecasts that revenue in global alternative energy and water industries will increase six-fold to $554 billion in 12 years.

The Future Energy Index Series covers all aspects of the global alternative energy sector including distributors of renewable energy components, index linked investment products and exchange-traded funds (ETF's).

The series comprises of seven indexes including the Future Energy 100, Alternative Energy, Alternative Energy (Upstream Supply), Alternative Energy (Asia) Solar, Nuclear and Water.

Hugh Grossman, head of research at Reputex, said investors had largely overlooked the impact of suppliers to alternative energy industries.

"High demand for upstream supply chain services, coupled with high barriers to entry due to technology and knowledge constraints plus strong pricing power, makes these industries a very appealing investment case," he said.

"Upstream suppliers are under immense pressure to fill the huge quantity of orders for component parts such as solar cells, wind turbines, gear boxes and rotor blades, notably in Asian markets. Overall these markets are experiencing tremendous growth driven by low cost materials and processing in markets such as China, India and Korea."

The Reputex Future Index Energy 100 Index, which tracks alternative energy stocks, outperformed global benchmarks by 119 per cent in three years and 16.8 per cent in twelve months.

Reputex is an index and investment research firm that calculates carbon, energy and sustainability impacts on the investment sector.