The rise, which is the second in the last five years, is below the latest inflation rate of 3.9%.
The Island imports 95% of its electricity from France and has a ‘hedging’ agreement with energy company EDF which lessens the impact of exchange-rate movements.
But Jersey Electricity chief executive Chris Ambler said the latest rise was ‘inevitable’ due to the lengthy fall in foreign exchange rates, which is largely due to Brexit and other inflationary pressures.
‘These hedging arrangements have sheltered our customers greatly in recent years, but the sustained weakness in sterling relative to the euro eventually flows through into our costs,’ he said.
‘By keeping this rise below inflation, and by deferring its implementation until after the winter, we have minimised the impact on household budgets.’
He added: ‘Providing affordable electricity and maintaining stable pricing are the most important factors in the provision of our service to customers.
‘This is only the second rise in five years, following last year’s 2% increase, which is a notable achievement given the scale of our investment in infrastructure in recent years.’
Jersey Electricity invested millions of pounds in two undersea cables to France in 2014 and 2016.
One third of Jersey’s electricity supply, which has a low-carbon footprint, is from renewable hydro-electric sources. Most of the rest comes from nuclear power plants.
