Australia’s Clean Energy Finance Corporation (CEFC) is providing an A$13m ($12.1m) loan for the expansion, expected to be completed in 2015.

Epuron acquired the initial project from SunPower after the latter developed and constructed it in October 2012.

SunPower – US-based and majority-owned by French oil giant Total – has now been contracted to design and build the expansion.

A power purchase agreement (PPA) is in place with Northern Territory's Power and Water Corporation (PWC), which will also purchase the electricity produced by the expansion.