Going forward, you can use the "Add bills" upload spreadsheet to add demand with your new consumption data, but this spreadsheet won't let you add just historical demand to your meter data (that would be an "Edit" and we don't have the capability to edit, only an "Add").
You have 2 options for adding historical demand data (which you don't have to do!, but you will need 12 months of demand data before you'll get any demand metrics):
- Manually enter demand data
- Delete your current meter entries and use the upload spreadsheet to add everything again with demand data. This is probably more complicated, especially if you only have one or two meters that you want to update with demand data.