The Australian Greens have developed a plan for the country to rely on 100 per cent renewable energy by 2050.

The plan proposes mapping renewable energy sources and funding necessary electricity grid infrastructure.

The policy would also include setting a national gross feed-in tariff and giving renewable energy developments pre-planning approval to provide certainty for investors.

Senator Christine Milne says legislation has already been prepared and the Greens are willing to negotiate to see their plan realised.

"Australia has the best renewable energy resource for solar anywhere in the world," she said.

"We are the envy of the world and yet we have Germany and the US pouring money into renewables and Australia still focusing on clean coal technology."

Senator Milne has dismissed concerns over the scheme leading to higher power prices.

"If you make the transition to renewable energy it is going to need investment but early action in climate change is cheaper than leaving it until later," she said.

"Every single poll, economic analysis shows if you go fast and if you make deep cuts then you increase your competitive advantage as a nation, you build new jobs."

Greens Leader, Senator Bob Brown, says a national energy grid is vital to achieving a total reliance on renewable energy.

He says the billion dollars allocated for the grid in Prime Minister Julia Gillard's climate change policy is not enough, and he has taken a swipe at other elements of the Labor plan.

"Yesterday's announcement by Julia that she's going to go to the phone book to pick out names to have our energy future shaped is daft," he said.

"It's just a complete failure of responsibility."

The Greens believe their plan for a 100 per cent renewable energy nation by 2050 is achievable with the right planning and investment.