Keelvolt
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Grid-connected BESS

Storage systems engineered to survive the interconnection study.

Utility-scale and C&I battery energy storage for EPC contractors, developers and network operators.

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Product lines

Four product lines

Container, PCS, EMS and module, sized per project.

Twenty-foot liquid-cooled battery energy storage container, three-quarter view.
Twenty-foot liquid-cooled enclosure

Battery container

Capacity
3.7 - 5.0 MWh
Cell
LFP 314 Ah
Ingress
IP55
Floor-standing power conversion cabinet with sealed front door.
Floor-standing cabinet, front access

Power conversion

Output
1.25 - 2.5 MW
Voltage
690 V AC
Grid code
IEEE 1547
Energy management control cabinet with the door open, showing rack modules and wiring.
Control cabinet, door open

Energy management

Protocol
Modbus TCP
Response
< 100 ms
Access
On-site + remote
Steel rack holding stacked prismatic battery modules linked by copper busbars.
One rack, eight modules

Battery module

Energy
86 kWh
Cycle life
> 8000
BMS
3-tier

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Single-line diagram, 5 MWh grid-connected blockUtility grid at 33 kV feeds medium-voltage switchgear and a 33/0.69 kV transformer onto a 690 V bus. A 2.5 MW power conversion unit connects the bus to two 2.5 MWh battery blocks. An energy management system supervises the conversion unit and both blocks.Utility grid33 kVMV switchgearTransformer33 / 0.69 kV690 V AC busPower conversion2.5 MWDC bus · 1331 VBESS block A2.5 MWhBESS block B2.5 MWhEMSSupervisorySolid: power path · Dashed: control link
One 5 MWh grid-connected block. Larger sites repeat it.

System architecture

One 5 MWh block

Usable energy
5.0MWhper 20 ft unit
Rated output
2.5MWone conversion unit
Round-trip efficiency
94.5%beginning of life, 25 °C

See the block specification

Project record

Blocks already running

Capacity, application, location and go-live date.

Aerial view of rows of storage containers beside dense photovoltaic arrays.Storage containers on concrete pads inside a substation yard.Two storage cabinets in a fenced factory yard with rooftop solar behind.

01 / 03 · project record

  1. 120MWh

    Renewable firming

    ChileLive 2024 Q2

    Four-hour block co-located with a PV plant, commissioned in two phases. Fire lanes between the container rows set the site footprint.

  2. 18MWh

    Frequency regulation

    GermanyLive 2023 Q4

    Grid-forming configuration. Primary-reserve prequalification was run on the delivered block itself.

  3. 6MWh

    Peak shaving

    AustraliaLive 2023 Q1

    Behind-the-meter installation on a constrained industrial connection, dispatched against the site load profile.

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Company

One plant, module to finished block

420 people across engineering, assembly and field service.

See the factory

// Since //

2014

Founded

Steel rack of stacked battery modules linked by copper busbars on the assembly hall floor.

4 GWh

Annual assembly capacity

52,000 m²

Plant floor area

Certification

Certification by product line

Row of battery containers with ventilated side doors, seen along the line of units.

IEC 62619:2022

Product line
Battery container
Market
EU

IEC 62933-5-2

Product line
Grid-connected ESS
Market
EU

UL 9540A

Product line
Cell · module · unit
Market
US

CE / EN 50549-1

Product line
Power conversion
Market
EU

Service

Ten-year service terms

Installation & commissioning

Pre-commissioning, site supervision, grid-code tests

Remote monitoring

Live telemetry, alarm escalation, SCADA export

Spare parts & response

Regional stock: modules, PCS boards, cooling

Warranty

Contractual capacity retention schedule

Technician in a high-visibility vest working at an open control panel inside a battery storage container during commissioning.
Commissioning inside a delivered block.

Project enquiry

Request a project quote

Connection voltage, duration, grid code and site constraints are enough to start.

Engineering reply
Within 24 hours on business days
Registered office
Keelvolt Energy Ltd · London, United Kingdom

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