Batterie HKW Bi Hybrid
7.5 MW, 7.5 MWh (1 hours) in Nordrhein-Westfalen, registered as operating since 7 July 2020. Everything on this page is read from Germany’s register of power units and the other published records named beside each fact.
What it is
The register holds this battery as one unit.
| Unit | Register number | MW | MWh | Commissioned | Battery | Grid operator check |
|---|---|---|---|---|---|---|
| Batterie HKW Bi Hybrid | SEE998402334093 | 7.5 | 7.5 | 7 July 2020 | Lithium | checked |
Power is the net power the operator registered, the most the unit may feed into the grid. Energy is the usable capacity of the unit’s installation. A grid operator check marked “checked” means the grid company has confirmed the entry; “under check” means it has not yet. On the large sites we compared, the register’s commissioning date often came months before the owner’s announced start, which suggests it records first energisation.
Who runs it and who owns it
| Operator in the register | Commercial register entry, as the operator gave it | Seat |
|---|---|---|
| Stadtwerke Bielefeld GmbH Assetmanagement Onshore Wind und PV (ZA) | Amtsgericht Bielefeld HRB 7373 | Bielefeld, Nordrhein-Westfalen |
Owner. Stadtwerke Bielefeld (shareholders not stated on source). Reported in the trade press and not yet confirmed by the owner or the commercial register. Evidence: ZfK, 29 July 2020: "Auf dem Betriebshof der Stadtwerke Bielefeld wurde am Mittwoch der Hybridspeicher in Betrieb genommen.". Checked 16 October 2026. Every battery of this family.
The register names the operator, the company that runs the unit. The owner behind it comes from the commercial register (Handelsregister) or the owner’s own publication, as marked. The register number is the one the operator typed in; on 11 October 2026 we found it wrong or missing for 26 of the companies we looked up.
Who trades it and what it is built from
No published source we have found names who trades this battery, who built it or whose cells it uses. Fields we cannot source are left out.
Where it connects
| Grid company | Bielefelder Netz GmbH |
| Connected at | high voltage (110 kV) |
| Municipality | , district of Bielefeld |
| State | Nordrhein-Westfalen |
| Permit | Bezirksregierung Detmold, 700-53.0054/19/1. |
| Register location | SEL955687207634 |
As registered. The grid company and voltage come from the register’s public unit table; the position is the one the operator registered. See it on the Atlas.
What has changed in the register
First registered on 15 April 2021; last changed in the register on 23 August 2021.
| Seen | Unit | What changed | From | To |
|---|---|---|---|---|
| 15 October 2026 | Batterie HKW Bi Hybrid | Municipality key | blank | 05711 |
What this page cannot show
Germany publishes no battery’s metered output. On 11 October 2026 we checked the four public sources that might carry it: the ENTSO-E Transparency Platform, SMARD, the yearly EEG data and the transmission companies’ redispatch records. None gives the output of any German battery, one by one or as a fleet. So this page cannot say what the battery exported, imported or earned, as Britain’s battery pages do.
Sources: Marktstammdatenregister, Bundesnetzagentur, Datenlizenz Deutschland, Namensnennung 2.0: the full export of 15 October 2026 and the public unit table of 15 October 2026. Company details from the register’s market actor table. Owners from the commercial register and the owners’ publications, as marked. Tender awards from the Bundesnetzagentur’s award lists.