# 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)**](https://support.ostrom.de/en/collections/12934588-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)?](https://support.ostrom.de/en/articles/11413142-what-is-the-new-24-hour-supplier-switch-lfw-24) - [I signed up before 06.06.2025. How long does it take to switch?](https://support.ostrom.de/en/articles/5461638-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](https://support.ostrom.de/en/articles/11417510-how-quickly-can-i-switch-to-ostrom-from-06-06-2025) - [How fast can my contract be confirmed?](https://support.ostrom.de/en/articles/5457623-how-fast-can-my-contract-be-confirmed) - [What new deadlines apply starting June 6, 2025?](https://support.ostrom.de/en/articles/11420031-what-new-deadlines-apply-starting-june-6-2025) - [How can I stay with Ostrom when moving?Elinor's moving!](https://support.ostrom.de/en/articles/11419215-how-can-i-stay-with-ostrom-when-moving) - [Why is the 24-hour supplier switch being introduced?](https://support.ostrom.de/en/articles/11419585-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?](https://support.ostrom.de/en/articles/11419629-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?](https://support.ostrom.de/en/articles/11419686-how-early-do-i-need-to-register-before-my-move-in) - [How do I know if the switch was successful?](https://support.ostrom.de/en/articles/11420078-how-do-i-know-if-the-switch-was-successful) - [Does the fast supplier switch change my cancellation period?](https://support.ostrom.de/en/articles/11420146-does-the-fast-supplier-switch-change-my-cancellation-period) - [Does the 24-hour supplier switch apply if I have a special right of termination?](https://support.ostrom.de/en/articles/11420241-does-the-24-hour-supplier-switch-apply-if-i-have-a-special-right-of-termination) - [Can I move my supply start date earlier?](https://support.ostrom.de/en/articles/11420267-can-i-move-my-supply-start-date-earlier) - [Why do I need my Market Location ID (MaLo-ID) for a supplier switch?](https://support.ostrom.de/en/articles/11553495-why-do-i-need-my-market-location-id-malo-id-for-a-supplier-switch) [**Sign Up**](https://support.ostrom.de/en/collections/12932173-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).](https://support.ostrom.de/en/articles/5445149-how-can-i-sign-up) - [What is "kWh" and how much consumption should I enter?](https://support.ostrom.de/en/articles/5457366-what-is-kwh-and-how-much-consumption-should-i-enter) - [What is a market location number (Marktlokations-ID) and where can I find it?](https://support.ostrom.de/en/articles/7035148-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?](https://support.ostrom.de/en/articles/8142181-i-got-a-letter-from-the-basic-supplier-what-should-i-do) - [Can I also purchase electricity from Ostrom as a business or company?](https://support.ostrom.de/en/articles/7019557-can-i-also-purchase-electricity-from-ostrom-as-a-business-or-company) - [Can I receive documents via post?](https://support.ostrom.de/en/articles/8142231-can-i-receive-documents-via-post) - [What happens after my registration with Ostrom is complete?](https://support.ostrom.de/en/articles/7019758-what-happens-after-my-registration-with-ostrom-is-complete) - [Where can I use Ostrom?](https://support.ostrom.de/en/articles/8173471-where-can-i-use-ostrom) - [Where can I find my contract details?](https://support.ostrom.de/en/articles/8239233-where-can-i-find-my-contract-details) - [Why does my contract start later than expected?](https://support.ostrom.de/en/articles/8239139-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)?](https://support.ostrom.de/en/articles/7019754-my-old-provider-has-increased-prices-how-can-i-sign-up-through-the-special-right-of-termination-sonderkundigungsrecht) - [Can you cancel my old electricity contract for me?](https://support.ostrom.de/en/articles/7019681-can-you-cancel-my-old-electricity-contract-for-me) - [Will there be interruptions in the power supply if I want to change my provider?](https://support.ostrom.de/en/articles/7019750-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)?](https://support.ostrom.de/en/articles/11469176-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?](https://support.ostrom.de/en/articles/11801431-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?](https://support.ostrom.de/en/articles/12891822-what-happens-if-there-s-a-supply-gap-before-my-ostrom-contract-starts) - [How do i find my local grid operator?](https://support.ostrom.de/en/articles/15069864-how-do-i-find-my-local-grid-operator) - [Can I also receive my contract confirmation as a PDF?](https://support.ostrom.de/en/articles/15203513-can-i-also-receive-my-contract-confirmation-as-a-pdf)