Energy secretary Ed Miliband has insisted "absolutely no decision has been made" on a potential move to zonal energy pricing.
The controversial scheme has been the subject of much heated debate, with critics including SSE boss Alistair Phillips-Davies, who warned plans to invest tens of billions in Scottish renewables projects would "all be in jeopardy" if the UK Government introduces zonal pricing.
Miliband told the BBC that "absolutely no decision has been made" on an energy pricing policy, but added: "This is an incredibly complex question that we are looking at about how we reform our energy market.
"There are two options, zonal pricing and reformed national pricing.
"Whatever route we go down my bottom line is bills have got to fall, and they should fall throughout the country.
"We are going to take our time over this very complex and important decision."
At present, electricity prices are uniform across the country, but proposals could see it divided into 12 different zones.
Prices in each zone would be determined by geographical supply and demand.
This would mean lower prices for those living closer to wind farms, and higher prices for residents in zones having to import power from other zones.
Centrica boss Chris O'Shea previously warned backers of the scheme are expecting "mass migration to windy places".
He cautioned that a zonal system, left unchecked, could become a "postcode lottery of energy prices", adding: "The idea that business will relocate to remote areas because energy is cheaper may not be realistic.
"They won’t go unless they can get the staff. Will people move before the jobs are there? And if both these unlikely events happen, what about the cost of the infrastructure which will be required such as the houses, the roads, the schools, the clinics, the hospitals etc.?
"Will that be available in good time? If so, will it really be cheaper than simply having a bigger and better grid?
"Curtailment costs are a problem-that is undisputed. One which could be solved by amending the cfd regime so producers don’t get paid for a product people don’t want to buy.
"Or, even better, we could build more energy storage. Would that not be simpler than expecting mass migration to windy places?"
Ecotricity boss Dale Vince has also raised fears around how complex zonal pricing would be, suggesting it would delay the net zero push and hit poorer households with extra charges.