To ensure your registration goes smoothly from June 6, 2025, we recommend that you start the sign-up process with Ostrom at least 14 days before your move-in date.
For the registration, you’ll need your meter ID and the handover protocol from your new apartment.
If all information is complete, the grid operator usually confirms your registration within 24 hours for the handover date.
Important: Retroactive registrations are no longer possible — the supply start date must be at least one day in the future.
Example: If you are moving in on August 1st, please try to sign up the latest during the last week of July to ensure you'll be supplied by us on 01.08.2025.