Octopus Energy, Great Britain’s largest household energy supplier, has launched a campaign requesting customers to minimize electricity usage this week during a significant solar eclipse expected to block up to 95% of sunlight across parts of the country. The utility is specifically asking households to avoid running washing machines and dishwashers between 6pm and 8pm on Wednesday, when the eclipse will coincide with peak electricity demand.
The timing of the eclipse presents particular challenges for the nation’s power system. As the moon blocks solar radiation, nearly all of the country’s solar power generation will be eliminated precisely when demand for electricity typically peaks in the early evening. This situation is further complicated by Britain’s fifth heatwave of the year, which is expected to increase consumption of air conditioning, fans, and refrigeration systems. Octopus estimates that the eclipse could eliminate between 700 megawatts and 1.3 gigawatts of solar generation in the UK, while affecting approximately 9.7 gigawatts of power production across Europe during the eclipse’s strongest point.
To incentivize participation, Octopus is offering customers enrolled in its rewards program a complimentary hour of electricity during the following weekend in exchange for conservation efforts during the eclipse. The initiative leverages the supplier’s existing “saving sessions” program, which provides rewards when households adjust consumption in response to renewable energy availability.
The National Energy System Operator has indicated it has been preparing for over a year to manage the eclipse’s effects on the grid. System operators across Europe are facing additional pressure because existing power systems are already strained due to ongoing heatwaves that have forced nuclear and coal plants to reduce or cease operations. Hydropower capacity in Norway, a major electricity exporter to continental Europe, has declined to its lowest levels in 30 years due to drought conditions.
Octopus estimates that homes could collectively provide approximately 13 gigawatts of flexible capacity to support the electricity system through smart appliances, electric vehicles, and home batteries, though only a fraction of this potential is currently being utilized.
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