What is the smart tariff?

Our smart tariff is a test we’re running for Bulb members with compatible smart meters. To join the smart tariff you need a smart meter for electricity that can provide us with an automatic reading every half hour. We’ll check to see if your meter is compatible when you sign up.

The true cost of electricity changes throughout the day depending on demand. There are 3 rates, Overnight is the cheapest, Peak is the most expensive, Off-peak is in the middle:


  • Overnight: 11pm-7am
  • Off-peak: 7am-4pm and 7pm-11pm
  • Peak: 4pm-7pm


  • Overnight: 11pm-7am
  • Off-peak: 7am-11pm

By taking half hourly meter readings, we aim to help you understand the real cost of energy so that you can make better choices about when you use it.

A better understanding of energy costs, combined with a 3-rate tariff means you can reduce your monthly bill by changing your habits. For example, use your dishwasher or washing machine outside the busy peak hours, or charge your electric vehicle overnight.

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