Information according to § 5 DDG
Ostrom is a brand of Aplus Energy GmbH


Aplus Energy GmbH
Straßburger Str. 55
10405 Berlin


The fastest way to reach us is via the live chat at the bottom right or via our contact form.


Matthias Martensen and Karl Villanueva

Registered office of the company


Handelsregisternummer (Trade register number)

HRB 223362 (Amtsgericht Charlottenburg)

Umsatzsteuer-ID (VAT-ID)


Legal notice

Content liability

As a service provider, we are responsible for our own content on these pages in accordance with general legislation pursuant to sec. 7 (1) of the DDG. According to §§ 8 to 10 DDG, however, we are not obligated as a service provider to monitor transmitted or stored third-party information or to investigate circumstances that indicate illegal activity.
Obligations to remove or block the use of information under the general laws remain unaffected. However, liability in this regard is only possible from the point in time at which a concrete infringement of the law becomes known. If we become aware of such infringements, we will remove this content immediately.

Link liability

Our offer contains links to external websites of third parties, on whose contents we have no influence. Therefore, we cannot assume any liability for these external contents. The respective provider or operator of the pages is always responsible for the content of the linked pages. The linked pages were checked for possible legal violations at the time of linking. Illegal contents were not recognizable at the time of linking.

However, a permanent control of the contents of the linked pages is not reasonable without concrete evidence of a violation of the law. If we become aware of any infringements, we will remove such links immediately.


The content and works created by the site operators on these pages are subject to German copyright law. The reproduction, editing, distribution and any kind of exploitation outside the limits of copyright require the written consent of the respective author or creator. Downloads and copies of this site are only permitted for private, non-commercial use.

As far as the content on this site was not created by the operator, the copyrights of third parties are respected. In particular, third-party content is marked as such. Should you nevertheless become aware of a copyright infringement, please inform us accordingly. If we become aware of any infringements, we will remove such content immediately.

Responsibility for this website

Aplus Energy GmbH is responsible for this website.

Europäische Online-Streitbeilegungs-Plattform

The European commission has set up an European online dispute resolution platform (ODR platform) under the following link: A consumer may access the ODR platform for purposes of any extrajudicial settlement of disputes arising from online contracts for services concluded with a business established within the EU.

Information on the dispute resolution procedure

In the event that we do not find a solution together, as a consumer within the meaning of sec. 13 of the German Civil Code (BGB), you can request a conciliation procedure at the Energy Conciliation Board. Aplus Energy GmbH is obliged to participate in such proceedings.Beyond that, we do not participate in any consumer dispute resolution proceedings.

The contact details of the conciliation board are:

Schlichtungsstelle Energie e.V.
Friedrichstraße 133
10117 Berlin
Telephone: 030-2757240-0
Fax: 030-2757240-69