Energy firm EDF has unveiled schemes it claims can cut energy bills for hard-up households by £100 a year.
The average household could be paying £6,500 a year for energy from April 2023, experts say.
The latest predictions from consultancy Auxilione are for yearly energy bills to rise to £3,576 from October 1, £5,066 in January 20233 and £6,552 from April.
EDF is sending letters to more than 100,000 of its most vulnerable customers to tell them about new schemes to help them save money.
The news comes as EDF managing director for customers Philippe Commaret said consumers face a "dramatic and catastrophic winter".
EDF says a £100 saving comes if customers agree to get a smart prepayment meter.
Are you already being charged over £5,000 a year for energy? Message mirror.money.saving@mirror.co.uk
The energy firm said getting this meter fitted means customers can "help beat the price cap by up to £100".
Normally customers with prepayment meters pay more for energy than those with standard meters.
The Mirror has asked EDF to explain its claims that this will save customers £100.
EDF added that customers with smart meters can use its free Energy Hub to help save money on energy bills.
The Energy Hub is available as an app or online, and lets customers accurately track their energy use and work out where to make savings.
The energy company is also launching a new Fresh Start campaign, which it says will support those with existing debt who are not able to repay the costs.
MrCommaret said: “As a business we are facing many challenges due to the rise in wholesale energy costs, but our main priority remains our customers.
"We are aware these new measures won’t solve these issues, but hope that they can provide the vital support needed for the most vulnerable."
The energy provider has also called on the Government to work with energy firms to find ways to help vulnerable customers as winter approaches.
Earlier today Commaret told BBC Radio 4's Today programme: "By way of context, I have to mention that we face, despite the support that the Government are already announced, a dramatic and catastrophic winter for our customers.
"In fact, in January half of the UK households might be in fuel poverty."
Regulator Ofgem will announce the price cap for October on August 26.
More than 80% of British homes are now on energy deals limited by the Ofgem price cap.
This price cap sets a limit on the rates a supplier can charge for each unit of gas and electricity you use, for homes on variable-rate energy deals paying by direct debit.
The price cap also sets a maximum for the daily standing charge, which is what you pay to have your home connected to the grid.
It is currently £1,971 for average use.
The price cap is altered every three months, in January, April, July and October.
