Heatwise provides 10 hours cheap rate electricity for storage heaters and electric water heating.
The times vary from area and from each individual meter but the basic times are as follows:
Night - 5 continuous hours between 12.00 - 07.00 am
Afternoon - 3 continuous hours between 13.00 - 16.30 pm
Evening 2 continuous hours between 17.30 pm - 22.00 pm
If you contact E.ON, they will be able to obtain your exact switching times from your meter details, definitely give them a call to get this information.
Many storage heaters are wired into the metering so they automatically click on and off at the right times, this isn’t always the case however.
A little investigation will help here, obtain the times from E.ON, check the meter is switching to these times by looking at the readings, then see if these changes coincide with your storage heating starting up.