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Quedlinburg

EXISTING ENERGY ASSET · AI CONVERSION · KLOPSTOCKWEG 10A, QUEDLINBURG

1 MW existing site connection, 2 MVA on site, 2.33 MWh stored. The energy is already here.

Book a site visit

What runs, what is being designed, what is open.

Twelve lines, three states, one date. Nothing here is summed.

  • complete

    Building

    In use

  • complete

    Grid connection

    1 MW, metered

  • complete

    Transformer

    2 MVA on site

  • complete

    Storage

    2.33 MWh installed

  • complete

    Photovoltaics

    450 kW on the façade

  • complete

    Antenna hosting

    Two carriers, under contract

  • in progress

    Low-voltage distribution

    Going in

  • in progress

    AI feed

    1.5 MW, design basis

  • in progress

    Cooling

    In-row air, design basis

  • planned

    Fibre

    Contractual status under verification

  • planned

    Permitting

    Not started

  • planned

    Customer

    Open

Stand: 08/2026

Four layers, four separate statuses.

  • completeExisting assetBuilding, grid, storage, PV — existing
  • completeEnergy systemGeneration, storage, antenna hosting
  • in progressBlackKub · AI compute1–3 MW class, in development
  • plannedAI FactoryExperience centre, training, community

Stand: 08/2026

Existing asset4,431 m²EXISTING
STATUS
EXISTING
EFFECTIVE
08/2026
SOURCE
Project data sheet
VERIFIED
06.08.2026
Storeys7MEASURED
STATUS
MEASURED
EFFECTIVE
06/2017
SOURCE
Structural drawing
VERIFIED
04.08.2026
Height28.40 mMEASURED
STATUS
MEASURED
EFFECTIVE
06/2017
SOURCE
Structural drawing
VERIFIED
04.08.2026
Clear height, ground floor4.41 mMEASURED
STATUS
MEASURED
EFFECTIVE
06/2017
SOURCE
Structural drawing
VERIFIED
04.08.2026
Clear height, upper floors2.60–2.67 mMEASURED
STATUS
MEASURED
EFFECTIVE
06/2017
SOURCE
Structural drawing
VERIFIED
04.08.2026
Floor loading600 kg/m²SIGNED REPORT
STATUS
SIGNED REPORT
EFFECTIVE
01/2023
SOURCE
Structural drawing
VERIFIED
31.07.2026
Rack envelope, standard positions184CALCULATED
STATUS
CALCULATED
EFFECTIVE
08/2026
SOURCE
Technical concept
VERIFIED
15.08.2026
Existing site connection1 MWEXISTING
STATUS
EXISTING
EFFECTIVE
08/2026
SOURCE
Project data sheet
VERIFIED
06.08.2026
Dedicated AI connection, engineering basis1.5 MWDESIGN BASIS
STATUS
DESIGN BASIS
EFFECTIVE
08/2026
SOURCE
Letter of intent, 08/2026
VERIFIED
15.08.2026
Expansion case, envisaged3 MWSUBMITTED
STATUS
SUBMITTED
EFFECTIVE
08/2026
SOURCE
Project data sheet
VERIFIED
09.08.2026
Transformer2 MVAEXISTING
STATUS
EXISTING
EFFECTIVE
08/2026
SOURCE
Site survey
VERIFIED
06.08.2026
Battery storage2.33 MWhEXISTING
STATUS
EXISTING
EFFECTIVE
08/2026
SOURCE
Technical concept
VERIFIED
06.08.2026
Storage power1.05 MWEXISTING
STATUS
EXISTING
EFFECTIVE
08/2026
SOURCE
Project data sheet
VERIFIED
09.08.2026
Photovoltaics450 kWEXISTING
STATUS
EXISTING
EFFECTIVE
08/2026
SOURCE
Technical concept
VERIFIED
06.08.2026
Antenna hostingVodafone · TelefónicaEXISTING
STATUS
EXISTING
EFFECTIVE
08/2026
SOURCE
Project data sheet
VERIFIED
06.08.2026
Lift1,000 kp ≈ 1 t · 12 personsMEASURED
STATUS
MEASURED
EFFECTIVE
08/2026
SOURCE
Site survey
VERIFIED
07.08.2026
Parcel9,497 m²OFFICIAL DATA
STATUS
OFFICIAL DATA
EFFECTIVE
07/2026
SOURCE
Cadastral data
VERIFIED
29.07.2026
AddressKlopstockweg 10a · QuedlinburgEXISTING
STATUS
EXISTING
EFFECTIVE
08/2026
SOURCE
Cadastral data
VERIFIED
29.07.2026
Revitalisation complete09/2026TARGET
STATUS
TARGET
EFFECTIVE
08/2026
SOURCE
Project data sheet
VERIFIED
09.08.2026
The Cube from the street corner: the whole photovoltaic-clad building, site hoarding along its foot, a car parked in front of it
BESTAND · 06/2026 · the whole building, from the corner

Two companies, two roles.

Black Vault is developing the proposed AI and compute layer in cooperation with the existing I-Kubus energy infrastructure.

Lars Gottschligg and Denys Tsvaig in BLACK VAULT GERMANY hard hats and 12 Elements vests on the roof of the Cube, the photovoltaic field running to the parapet behind them
BESTAND · Lars Gottschligg, I-Kubus GmbH, and Denys Tsvaig on the roof of the Cube
  • complete

    I-Kubus GmbH

    The existing building and its energy infrastructure

  • in progress

    Black Vault

    The proposed AI and compute layer, and the commercial route to it

Whose building this is.

The tower was bought and converted long before anyone here was talking about compute. That is worth saying first, on his page.

Portrait of Lars Gottschligg, managing director of I-Kubus GmbH
Lars Gottschligg

Lars Gottschligg

Black Vault's main partner in Germany

Managing Director, I-Kubus GmbH

Bought the tower more than ten years ago and turned it into the I-Kubus: grid connection, storage, photovoltaic façade. Everything running in the building today runs because of that decision.

From Lost Place into Future Place. Recognising the resources, and using what the energy transition makes possible, innovatively and sensibly. For an economic and environmentally sound future for new energy sites: my commitment, and everything I have.
BESTAND · 06/2026 · Anna Bon on the roof of the Cube · sound on

From the founder

Anna, on the roof.

Director, 12 Elements Ltd

€100 m–€1 bn
infrastructure and technology mandates
  • Oxford programme, AI Governance & Public Policy
  • Davos, every year since 2023

At the Quedlinburg site.

Five things that exist. Photographed.

One picture, one figure from the register.

  1. The compact substation outdoors with its doors open: Eaton switchgear, moulded-case breakers, copper busbars and the incoming cables terminated below
    BESTAND · 08/2026 · the compact substation, doors open

    1 MW

    EXISTING
    STATUS
    EXISTING
    EFFECTIVE
    08/2026
    SOURCE
    Project data sheet
    VERIFIED
    06.08.2026

    The building's grid connection is metered and live.

  2. Inside the distribution cabinet: copper busbars marked L1, L2, L3, the three incoming cables terminated on lugs, numbered fuse switch-disconnectors alongside
    BESTAND · 08/2026 · busbars and the incoming feed, L1 L2 L3

    2 MVA

    EXISTING
    STATUS
    EXISTING
    EFFECTIVE
    08/2026
    SOURCE
    Site survey
    VERIFIED
    06.08.2026

    The transformer and the low-voltage distribution it feeds.

  3. Photovoltaic modules seen from inside the façade cavity, aluminium substructure between them and the red and black DC harness running down the wall
    BESTAND · the façade from inside, DC cabling on the substructure

    450 kW

    EXISTING
    STATUS
    EXISTING
    EFFECTIVE
    08/2026
    SOURCE
    Technical concept
    VERIFIED
    06.08.2026

    Generation on the building's skin, not on a field beside it.

  4. Antenna panels on a mast at the roof edge against a clear sky, the access ladder and railing beside them
    BESTAND · the carriers' antennas at the roof edge

    Vodafone · Telefónica

    EXISTING
    STATUS
    EXISTING
    EFFECTIVE
    08/2026
    SOURCE
    Project data sheet
    VERIFIED
    06.08.2026

    Two carriers host equipment here, under running contracts.

  5. An empty floor running the length of the building: bare concrete, ribbon windows down one side, services on the soffitAS IT STANDSCONCEPT
    BESTAND · a floor as it stands, end to end

    4,431 m²

    EXISTING
    STATUS
    EXISTING
    EFFECTIVE
    08/2026
    SOURCE
    Project data sheet
    VERIFIED
    06.08.2026

    Seven structurally sound, empty floors make this a fit-out, not a build.

Conversion of the existing structures.

A prefabricated DDR office tower that stood empty for thirty years, converted twice: first into an energy building, now into an energy and compute node.

The bare concrete tower in scaffolding, before the photovoltaic façadeBeforeToday

BESTAND · the primary structural frame was retained and repurposed.

Work platform at the photovoltaic façade
BESTAND · PV façade, installation
Antenna masts and roof photovoltaics
BESTAND · antennas and roof PV

≈ 1983

VEB Mertik

VGB system, catalogue B 8619 PKI: precast columns, beams, and hollow-core planks—catalogued parts that make the 40-year-old structure load-checkable.

1990s

Empty

Vacant from the early nineties. Structure intact, façade intact, nothing removed.

2023

E-Kubus

The E-Kubus concept: façade PV, ground-floor battery storage and charging at grade. Structurally verified January 2023.

2025–2026

Energy conversion

Energy conversion and revitalisation. I-Kubus is carved out of SSC hydrovent AG and acquired by I-Kubus GmbH on 17.04.2025.

now

Platform node

Grid, storage, PV and antenna hosting are running. Compute is planned for the floors above.

The existing energy asset.

The list below is the energy infrastructure existing in the building, operated by I-Kubus. The picture beside it is the same building as it stands and as it is intended to look.

The Cube this summer: the photovoltaic façade complete, the ground floor still a shell behind site fencingAS IT STANDSCONCEPT

BESTAND 06/2026 ↔ CONCEPT · the same corner

completePV generation450 kW · façade and roof, with data streaming
completeStorage2.33 MWh · 10 cabinets × 233 kWh
completeAntenna hostingVodafone · Telefónica, on the roof
in progressSpot tradingSpecification pending
in progressEV chargingStatus pending
plannedVirtual power plantSpecification pending
A storage cabinet standing open against a brick wall: five battery modules racked one above the other, their power and signal cabling gathered down the door frame
BESTAND · 06/2026 · a storage cabinet, open · resolution enhanced
Two low-voltage distribution cabinets standing open in a bare room, busbars and fuse switch-disconnectors fitted, cables run in, tools and a work light on the floor
BESTAND · 08/2026 · the low-voltage main distribution going in
A row of white power-conversion cabinets standing on steel plinths in a bare floor, ventilation louvres and status lamps on each door
BESTAND · 06/2026 · the conversion cabinets, set and standing
Six inverters on an interior wall with the DC harness below
BESTAND · six inverters, DC harness gathered below

The battery floor carries the machine floors.

Batteries below, the machine above. Here scrolling is climbing: the section holds still and the floor changes.

Ground floorEnergy Storage · Visits · MobilityDesign · pending review
STAIRWELL · ELEVATOR ARRIVAL Main LV A · Grid Intake≈ 23 m² Exhibition≈ 74 m² Access≈ 23 m² Dock≈ 14 m² Reception≈ 32 m² Main LV B · Grid Intake≈ 23 m² Train Bay≈ 70 m² BESS · BlackKub≈ 69 m² BESS · Existing≈ 35 m² Reserve≈ 35 m² Corridor EXTERIOR ELEVATOR location to be confirmed 722 721 717 722 723 720 4403 480 241 479 1299 G F E D C B A 1 2 3 4 N 0 20 m
CONCEPT · Battery RoomCONCEPT
CONCEPT · Fire-Suppression SystemCONCEPT
1st floorData Centre · Exhibition CorridorDesign · pending review
STAIRWELL · ELEVATOR ARRIVAL Main LV · Distribution≈ 35 m² MMR · Network≈ 62 m² Whitespace North≈ 92 m² UPS · Battery≈ 35 m² Whitespace South≈ 173 m² Corridor EXTERIOR ELEVATOR location to be confirmed 722 721 717 722 723 720 4403 480 241 479 1299 G F E D C B A 1 2 3 4 N 0 20 m
CONCEPT · Server Room · the cold aisleCONCEPT
CONCEPT · Corridor—the central spine, arrival at the elevatorCONCEPT
2nd floorData Centre · WhitespaceDesign · pending review
STAIRWELL · ELEVATOR ARRIVAL Main LV, level 2≈ 35 m² Plant · Store≈ 62 m² Whitespace North≈ 92 m² Reserve · Carrier 2≈ 35 m² Whitespace South≈ 173 m² Corridor EXTERIOR ELEVATOR location to be confirmed 722 721 717 722 723 720 4403 480 241 479 1299 G F E D C B A 1 2 3 4 N 0 20 m
CONCEPT · Server Room · the cold aisleCONCEPT
CONCEPT · Technical Center (main LV distribution)CONCEPT
3rd floorUPS · uninterruptible supplyDesign · pending review
STAIRWELL · ELEVATOR ARRIVAL Main LV, level 3≈ 35 m² USV · N+1≈ 62 m² Free≈ 92 m² Free≈ 97 m² Free≈ 92 m² Corridor EXTERIOR ELEVATOR location to be confirmed 722 721 717 722 723 720 4403 480 241 479 1299 G F E D C B A 1 2 3 4 N 0 20 m
CONCEPT · UPS · BatteryCONCEPT
CONCEPT · Technical Center (main LV distribution)CONCEPT
YardHeat Rejection · Cooling PlantDesign · pending review
RoofPV array · telecom masts · unchangedExisting
BESTAND · Roof area over the PV plane toward the HarzBESTAND
BESTAND · Cellular antenna installations on the coreBESTAND
Request the full drawings
1st floor as it stands, bare shellAS IT STANDSCONCEPT

What is here. What we install. What you bring.

The same building, read as a chain. The line style is the answer, so nothing has to be taken on trust from a sentence.

  • Existing
  • Our scope, to be installed
  • Customer configuration
  1. 01Grid connection1 MW existing site connection, metered, through the compact substation outside.
  2. 02Transformer2 MVA on site, stepping the connection down to low voltage.
  3. 03Low-voltage distributionThe main distribution boards, going in now: busbars fitted, cables run.
  4. 04Dedicated AI feedA separate new transformer for the AI stage, at the 1.5 MW development basis.
  5. 05UPS and PDUConditioning and distribution to the floor. Topology follows the availability class a customer specifies.
  6. 06Data floorTwo upper floors fitted out: containment, cable management, fire compartmentation.
  7. 07In-row coolingAir with hot-aisle containment, at the 13.6 kW/rack the layout is designed around.
  8. 08Racks and hardwareYours. Accelerator, density and redundancy are the customer's design, and they set what the floor above has to become.

Every rack count needs a density beside it.

184 positions at 13.6 kW

Counted from our two-floor rack layout at 2.5 MW IT in the 3 MW expansion case, below the ~15 kW ceiling-air-with-containment limit, hence in-row cooling.

Higher density, by design

Past that ceiling the building takes liquid to the rack, and the figure follows the accelerator a customer specifies. We compute it against your hardware.

One megawatt of site connection. The compute comes next.

Steps, not a sum.

  1. 01 · Existing site connection

    1 MW

    completeEXISTING
    STATUS
    EXISTING
    EFFECTIVE
    08/2026
    SOURCE
    Project data sheet
    VERIFIED
    06.08.2026

    Through the existing 2 MVA transformer.

  2. 02 · Dedicated AI connection

    1.5 MW

    in progressDESIGN BASIS
    STATUS
    DESIGN BASIS
    EFFECTIVE
    08/2026
    SOURCE
    Letter of intent, 08/2026
    VERIFIED
    15.08.2026

    Current engineering basis, on a separate new transformer. Subject to grid confirmation.

  3. 03 · Expansion case

    3 MW

    plannedSUBMITTED
    STATUS
    SUBMITTED
    EFFECTIVE
    08/2026
    SOURCE
    Project data sheet
    VERIFIED
    09.08.2026

    Applied for with the grid operator. Not granted.

The full rack envelope and the design density belong to the far end of this sequence, not to today's connection.

The programmeThis building is the first step, not the plan.

The Cube is Black Vault's smallest and first standing project, within a 2 GW European build-out by 2035 and a five-year plan for 100 small datacenters. This building is the block at the center.

1–3 MWQuedlinburgIn development400 MWGermanyBy 2032· Target2 GWEuropeBy 2035· TargetNEW GENERATION · AI · QUANTUM
Not to scale. The two outer rings are development pipeline, not capacity on offer.

100

datacenters in Germany and Europe, one company each

Two under way today · Target · Stand 08/2026

Come and read the plates yourself.

Everything on this page marked as existing can be stood in front of. We assemble visits in groups; tell us what you need to see and we will say what is open on the day.

Klopstockweg 10a, Quedlinburg. Ninety minutes covers all of it. Bring whoever has to sign.

Book a site visit
BESTAND · 06/2026 · three phone clips of an ordinary walk-through
  • completeThe building, all seven floors
  • completeThe compact substation, doors open
  • completeThe transformer and the low-voltage distribution
  • completeThe battery room
  • completeThe photovoltaic façade, inside and out
  • completeThe roof, its antennas and its plant

Document status · Revision 01 · Updated 07 Aug 2026
Technical owner: Engineering · Data cut-off: 07.08.2026

Where else to go.

The rest of the site, including the parts a diligence reader wants and the parts the law requires.

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