Octopus Energy is asking eligible customers to cut electricity use during Wednesday's partial solar eclipse, with its Eclipse Power Down session running from 18:00 to 20:00 on 12 August. Royal Observatory Greenwich says the event will bring the greatest solar coverage seen from the UK and Ireland since 1999. How Octopus Customers Can Earn Free Electricity During the EclipseCustomers must join Octoplus and Saving Sessions before opting in to the Eclipse Power Down. Octopus will track usage during the two-hour session, and says customers qualify by cutting electricity use during at least one half-hour period. Why the Eclipse Matters for Britain's GridThe eclipse will cut solar output as millions of people return home and electricity demand climbs, Octopus says.