Will I get a warning when my credit is low?

Electricity: 

Yes, when your credit reduces to €2 you will hear an alarm which will sound for 2 minutes. To turn the alarm off press the 0 button. It will be repeated every half hour until the button is pressed. For your convenience the alarm will not sound at night between 9 pm and 9 am (10 pm and 10 am in summer). 

Gas:  

Once the credit on the meter drops to a low level you may be offered ‘Emergency Credit’. This can be borrowed until you can buy some more credit.