Alan Bates, chief executive of Guernsey Electricity, said: “Essential works continue to replace the faulty part of the Channel Islands Electricity Grid between Guernsey and Jersey.
“As part of the final stages of these works the subsea cable GJ1, is turned off for short periods to allow safe working adjacent to the cable. During this time, we use the generators at the power station to maintain supplies to the Island, but this results in less resilience to electricity supply disruptions.
“Unfortunately, at 09:02 on Monday 2 September we experienced an Island wide power outage. Generators at the Vale power station were quick to restore supplies and the majority of customers were restored by 9:30am. The remaining customers were restored at 10:06.
“We apologise for any disruption caused to customers, and we are now investigating the cause of the power outage.
“This event again reinforces the need for Guernsey to have a secure and reliable subsea electricity cable connection to the Island. Guernsey Electricity continues to progress a second cable connection direct to France to further enhance the security of electricity supply.”
