Economy 7 is not automatically cheaper. The day rate, night rate, standing charge and how much electricity you use overnight all affect the result. The break-even percentage uses the rates and standing charges you entered; it is not a universal Economy 7 threshold.
Enter your figures to see a result.
This comparison uses the same entered usage and comparison period for both tariffs.
Do not use a single rate
Economy 7 calculations need the usage and rate for each register. Include a standing charge separately when comparing total tariff cost.