Martin Lewis' Money Saving Expert website has highlighted a 'loophole' for those on pre-payment metres.
As the energy price cap hits in April, the average household bill is expected to rise by an extra £693. Meanwhile those on pre-payment it is expected to rise by £708 making yearly bills go up to an eye-watering £2,017.
According to MSE: "Prepayment meters are more expensive than standard credit meters is simply that they are more effort for the suppliers. Providers prefer to get regular, automatic payments for your energy, which is what you get with direct debit payments on standard credit meters".
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Now the team behind MSE, are urging people to 'stock-pile' energy.
On the website, they say that those on pre-payment meters can top up as much energy as they can before the price cap goes up.
And it's totally legal.
The team said: "Many with older, non-smart meters on price-capped tariffs can legally 'stockpile' gas & electricity credit before prices shoot up. If you can afford to, it could mean big savings."
Andrew Capstick, an energy analyst for the Money Saving Expert team said the rates "won't change until the first time you top up following a price change, so any credit you've added before then will be charged at the old rates".
