# Sign Up

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

## Helpful Links

- [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)