"It is pretty clear the opportunity in Australia is going to be real," he added.
Trustpower is already the biggest wind power generator in South Australia and has a significant pipeline across the Tasman.
Mr Hawksworth said there had been several positive recent signs regarding its Australian renewables policy, including a more supportive political climate towards clean energy under new Prime Minister Malcolm Turnbull.
Wind projects required large amounts of capital to develop and a demerger of Trustpower Core and NewCo would provide Trustpower shareholders with choice in relation to capital allocation.
"In order to pursue that opportunity and develop our pipeline, Trustpower needs to be able to fund it," said Mr Hawksworth. "As time rolls along, we will have potentially quite different businesses, and prospectively different investors might want to look at them."
Trustpower chairman Dr Bruce Harker said Trustpower had a strong track record of developing wind assets in Australia and New Zealand.
"Given the significance of the opportunity in front of us, we have been considering the most efficient way to fund the next phase of the wind development pipeline over an extended period.
"The proposed demerger would enable Trustpower to create two new businesses with clearly defined strategies, and provide investors with the flexibility to choose which parts of the business to invest in."
If the proposal is given effect, shareholders would receive one share in each of NewCo and Trustpower Core for each share held in Trustpower.
Trustpower Core and NewCo would be listed on the NZX and NewCo may also be listed on the ASX. Dr Harker will be stepping down as chairman of Trustpower to become designate-chairman of NewCo and lead the team developing the new business.
Paul Ridley-Smith has been appointed to fill the director position and as board chairman.