Sign Up & Switching

Here’s where you’ll learn how to sign up, estimate your usage, and what to keep in mind for the 24h supplier switch starting June 6, 2025.

🚨 Starting June 6th 2025: Supplier Switch Within 24 Hours (LFW24)

Thanks to new regulations, you’ll be able to switch electricity providers in just 24 hours starting in June 2025. Find out what changes when you move or switch providers – and which new deadlines apply.

• What is the new 24-Hour Supplier Switch (LFW 24)?
• I signed up before 06.06.2025. How long does it take to switch?
• How quickly can I switch to Ostrom from 06.06.2025?Example Timeline: How the Switch Works with LFW 24
• How fast can my contract be confirmed?
• What new deadlines apply starting June 6, 2025?
• How can I stay with Ostrom when moving?Elinor's moving!
• Why is the 24-hour supplier switch being introduced?
• What happens if I only set up my electricity contract for the new apartment after moving in?
• How early do I need to register before my move-in?
• How do I know if the switch was successful?
• Does the fast supplier switch change my cancellation period?
• Does the 24-hour supplier switch apply if I have a special right of termination?
• Can I move my supply start date earlier?
• Why do I need my Market Location ID (MaLo-ID) for a supplier switch?

Sign Up

From move-in to consumption estimates to your MaLo ID – all the key info for signing up with Ostrom in one place.

• How can I sign up?All you need is your address, your kWh consumption, and your meter number (Zählernummer).
• What is "kWh" and how much consumption should I enter?
• What is a market location number (Marktlokations-ID) and where can I find it?
• I got a letter from the basic supplier. What should I do?
• Can I also purchase electricity from Ostrom as a business or company?
• Can I receive documents via post?
• What happens after my registration with Ostrom is complete?
• Where can I use Ostrom?
• Where can I find my contract details?
• Why does my contract start later than expected?
• My old provider has increased prices. How can I sign up through the special right of termination (Sonderkündigungsrecht)?
• Can you cancel my old electricity contract for me?
• Will there be interruptions in the power supply if I want to change my provider?
• What’s the difference between default supply (Ersatzversorgung) and basic supply (Grundversorgung)?
• What is the grid operator and how do I find out which one is responsible for my address?
• What happens if there’s a supply gap before my Ostrom contract starts?Will I still receive electricity if there’s a gap between suppliers?
• How do i find my local grid operator?
• Can I also receive my contract confirmation as a PDF?