Australia will fall short of its Paris carbon reduction targets signed under Tony Abbott unless it lifts its renewable energy production to levels higher even than Labor's plan for 50 per cent green energy reliance by 2030.

The first assessment by the Australia Institute's new Climate and Energy Program, to be released on Monday, has found that unless a higher burden is placed on the more expensive process of carbon reductions in other sectors – agriculture, transport and manufacturing – then the electricity generation sector will need to aim for a renewable energy target of at least 66 per cent by 2030, and possibly as high as 75 per cent.

Australia's Paris carbon reduction targets were signed under former prime minister Tony Abbott. Credit:AAP

That is, a power generation sector where the fossil fuel component is reduced to perhaps a quarter of the size it is now.

Power generation currently accounts for 35 per cent of total emissions, which is twice as much as the next biggest contributor, fuel combustion and transport, at 18 per cent.