How do I know which is the day rate and which is the night rate on my meter?
If you have an economy 7 meter, you will have a night rate and a day rate. To determine which rate is which, you can simply read your meter twice on the same day between 9am and 9pm, ensuring the readings are taken at least two hours apart. Keep a note of the times and date your reads were taken.
The register which shows a change in your reading is your day register.