Why is my electricity top-up code longer than normal?

A standard electricity keypad top-up code has 20 digits. You may get a longer code when we need to update your meter. There are two main reasons:

1. A change to your electricity rate. If your rate is changing, you’ll get a longer code in the weeks before the change. Entering it adds your top-up amount and updates your meter to the new rate when the change takes effect.
2. A meter settings update. A longer code may also be needed to update your meter’s settings.