A Sky+HD update has extended the the set-top box's eco-mode setting by 50 per cent, in a bid to cut energy consumption and reduce environmental impact.
Between 2.45am and 5.45am, when the majority of Sky TV subscribers are asleep, their connected TV box will switch into low-energy mode.
David Meredith, Head of Core TV Products at Sky, described this as being "a small, but important update" to the device.
The set-top box switches modes automatically, meaning there is no need for subscribers to take any action themselves.
Moving into low-energy mode for three hours each night means customers spend less on electricity for their Sky+HD unit.
This, in turn, helps to reduce their carbon footprint, as less energy is needed to support their TV viewing.
Mr Meredith claimed the update is "great for subscribers' energy bills, and even better for the environment".
He said the service improvement, which comes alongside revamped ‘Family’ settings and a more accessible Sky TV Guide, reflects Sky's "ongoing commitment" to deliver "more sustainable, more accessible, safe and easy to use" products to its customers.
"It’s great to see it all come together and we’ll keep working to create an even better Sky experience," Mr Meredith added.