Speicher Buch
7 MW, 14 MWh (2 hours) in Untermerzbach, Bayern, registered as operating since 1 September 2023. 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 |
|---|---|---|---|---|---|---|
| Speicher Buch | SEE983724235456 | 7 | 14 | 1 September 2023 | 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 |
|---|---|---|
| Solarpark Buch GmbH ＆ Co. KG | Amtsgericht Augsburg HRA 20145 | Sielenbach, Bayern |
Owner. Energiebauern GmbH, Sielenbach (Amtsgericht Augsburg HRB 20289); its own shareholders were not checked; private individuals hold part of one older company, through Energiebauern GmbH, presumed. Inferred: the operator shares a company address with this family, and its own entry was not read. 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 | Bayernwerk Netz GmbH |
| Connected at | high voltage (110 kV) |
| Municipality | Untermerzbach, district of Haßberge |
| State | Bayern |
| Land parcel | Lichtenstein, Flurstück: 1343 |
| Registered position | 50.1233, 10.8007 |
| Register location | SEL995022673137 |
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.
Tender award
| Unit | Award | Announced | Bidder | MW bid |
|---|---|---|---|---|
| Speicher Buch | Inn21-1/037 | 7 May 2021 | FB Energie 4 GmbH & Co. KG not today’s operator | 0 |
The innovation tenders pay a market premium to solar or wind paired with storage. The award lists are the Bundesnetzagentur’s. A bidder that differs from today’s operator dates a change of hands, or a spelling difference.
What has changed in the register
First registered on 4 September 2023; last changed in the register on 1 October 2024. No change has shown in our reads since the first, on 10 October 2026.
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.