Please refer to the table below to see what your tariff’s peak and off-peak time periods are. 

Time of Use Tariff Peak and Off Peak Times
TariffPeak timesOff Peak
*Assumed peak usage*Assumed
off-peak usage
Zap Flash Tariff April 2022**7am – MidnightMidnight – 7am50%37% (with 13% for 4hour ‘flash period’)
Green Driver January 2023 v13am – 10pm10pm – 3am70%30%
Green Driver 5 hour June 20235am – MidnightMidnight – 5am63%37%
Green Driver 7 hour June 20237am – MidnightMidnight – 7am57%43%

*Assumed usage displayed as a percentage of your estimated daily usage. 

**On the Zap Flash tariff, customers also benefit from one weekly flash period of 4hours of free electricity at the following times during the year: 

The Summer Flash Period will run from 1 April 2021 until 30 September 2021 between:11am – 3pm   

The Winter Flash Period will run from 1 October 2021 until 31 March 2022 between: 11pm – 3am