An Abbott government push for the nation's green bank to fund only fledgling clean energy technology has been questioned after it emerged Trade Minister Andrew Robb once appeared to describe such projects as "wild and wacky".

The government has come under fire for moving to prevent the $10 billion Clean Energy Finance Corporation from backing wind energy and household solar projects.

Trade Minister Andrew Robb says the TPP deal is close to being signed. Credit:Alex Ellinghausen

The Senate had previously blocked the government's attempts to abolish the agency.

Prime Minister Tony Abbott said this week the CEFC should not invest in established technologies that can easily attract private funding.