The energy regulator will conduct a consultation on how it caps bills, as many suppliers continue to struggle with increasing gas prices.
Thirteen energy suppliers have gone bust since the beginning of September, beaten by soaring wholesale energy costs and unable to pass costs to customers due to the restrictions of the price caps.
According to analysts cited by news agency Reuters, the difference between wholesale prices and what suppliers can charge is currently around £400 per customer per year.
In a letter to suppliers, Ofgem said: “The unprecedented and unexpected rise in gas and electricity prices over recent months has put energy markets under severe strain.
“We have been working with the government, the energy industry, and consumer bodies to manage the situation, protecting consumers during this challenging time.
“As this period of uncertainty continues, and the pressure on the sector grows, we are taking steps to protect the short- and long-term interests of consumers, providing greater certainty for investors and strengthening the resilience of the sector.”
The consultation will be launched in November and a decision on any changes will be published in February, when the next price cap will be announced but in time for any changes to be implemented before it comes into effect in April.
News of the measures was welcomed by Michael Lewis, chief executive of energy supplier E.ON, who said: “We’ve got to take a cold, hard look at the energy market to understand what went wrong and to make sure we can stop this happening again.
“Customers are already facing steep rises in bills because of the sudden jump in wholesale energy costs, made worse by the added costs from the failure of more than a dozen energy companies.
“Today’s update from Ofgem is a welcome step in the right direction and I applaud the speed of their response.
“This is a positive move towards making sure only responsible companies can play a part in our energy future and in insulating customers from picking up the tab of bad businesses.”
A spokesperson for British Gas parent company Centrica said: “Protecting consumers from irresponsible supplier practices is essential and therefore we welcome Ofgem’s letter, which we will review in detail.
“Ultimately lessons must be learnt to ensure what we’re currently seeing in the retail energy market never happens again.
“It is very clear that increased regulation is needed, similar to that of the banking and financial services sectors. We must ensure that companies who make a promise to their customers can actually deliver on that commitment.”
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