You should enter the value it would cost to replace the bike as new. If it's second hand, then use Google to find out the new price, or speak to your local retailer.
If you enter a lower value then this is the maximum amount that would be covered in the event your bike is stolen and we don't want you to be out of pocket!
Does your e-bike meet Government 'EAPC' requirements? Take the Bikmo e-bike questionnaire to find out.