A second major solar farm in Western Australia's South West is up for approval on Monday, with the $200 million farm hoped to power about 35,000 homes, create about 250 jobs during construction – and help WA catch up to other states embracing solar.

A fortnight after Melbourne-based South Energy’s $250 million, 183-megawatt solar farm proposal was approved for Waroona, the company's proposal for another site 40 kilometres away in the Shire of Harvey, the 100-megawatt Benger Solar Farm, is up for consideration at the local joint development assessment panel.

WA presently lags way behind in rooftop solar and has no large-scale solar farms, while by contrast Queensland, New South Wales and South Australia have five currently operating ranging from 124-220MW in capacity and five under construction between 330-1500MW.

The $20 billion Sun Cable project planned for the Northern Territory, which counts Australian billionaires Mike Cannon-Brookes and Andrew "Twiggy" Forrest as investors, will have a 10-gigawatt capacity array that will not only power Darwin but send enough energy via submarine cable to power 20 per cent of Singapore and replace its use of gas.