rivers of electric vehicles could easily cut their energy bills because they are on the wrong deals, analysts say.

Many households are going back to fixed-rate deals, which all but disappeared from the market during the energy crisis, but they may not be the best option, particularly for those with electric cars.

Other lesser-known tariffs, which charge different rates at different times of day, could save drivers hundreds of pounds a year — something many will be keen to do given that the regulator has just announced a 2 per cent rise in its price cap from October. Here’s what you need to know.

Beating the cap

Ofgem’s price cap, which limits the price suppliers can charge per unit of gas and electricity, applies to customers on variable-rate tariffs.