British Gas is urging thousands of its customers to power up their devices and tackle household chores during a special half-price electricity window on Friday, 19 December.
What is the Green Flex Event?
The energy supplier has announced a PeakSave Green Flex event, offering eligible households 50% off their electricity for a two-hour period from 11am to 1pm. This initiative is designed to encourage energy use when there is an abundance of renewable power from sunny or windy conditions, thereby easing strain on the national grid.
Customers can take advantage of the discounted rate for everyday tasks. British Gas suggests this is an ideal time to charge phones and laptops, prepare lunch, or even start early preparations for Christmas Day next week. There is no obligation to participate, but shifting activities like washing, cleaning, or cooking into this window can lead to greater savings.
How to Access the Savings
The discount is available to both new and existing participants of the PeakSave scheme. Eligible customers receive an email to opt-in to these Green Flex events. All savings earned will appear as a credit on their subsequent energy bills.
This special Friday event is in addition to the regular PeakSave Sunday scheme, which provides half-price electricity every Sunday between 11am and 4pm automatically for members. British Gas uses its own forecasting to schedule these Green Flex tests, assessing both customer savings and the impact on grid demand.
A Greener, Smarter Energy Future
The scheme's success is built on the rollout of smart meter technology. British Gas has installed over 1.2 million smart meters in 2025 – more than any other UK supplier – enabling more homes to benefit from dynamic, smart tariffs.
Since its launch, the broader PeakSave programme has rewarded customers for flexible energy use. British Gas has paid over £30 million to more than 1.3 million customers taking part, promoting a greener energy supply by aligning consumption with renewable generation.
For those signed up, it represents a simple way to cut costs while supporting environmental goals, turning routine household activities into a direct contribution to a more sustainable power system.
