According to figures, rising prices between 2003 and 2006 have led to four million households in the UK living in "fuel poverty".
Discussing the call for action, energywatch's campaign director Adam Scorer said: "There is a danger of the government getting carried away by Ofgem's innate optimism that the competitive energy market will deliver for the fuel-poor.
"Regardless of further price rises, hard-pressed consumers should be able to take comfort from knowing that there is a minimum standard of help available, regardless of the supplier they are with."
The announcement of energywatch's new campaign has come around a fortnight aftetr the watchdog called for the government to introduce smart metering technology to all households across the UK within the next decade.
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