BOS Power | Battery Energy Storage System | BESS

Turnkey EPC Partner for MW-Scale, Grid-Integrated Projects

Utility-scale BESS projects in the Nordics demand full design responsibility, controlled interface management and structured grid code approval to secure predictable Commercial Operation Date.

BOS Power acts as a single accountable EPC partner from engineering and supplier qualification to integration, commissioning and final grid approval. All core suppliers are subject to rigorous technical and financial due diligence.

BOS-P_Battery-container_v1-1

The Real Challenge in Nordic BESS Projects

Utility-scale BESS projects in the Nordics operate within strict regulatory frameworks and demanding grid code requirements.

Projects often involve separate contracts for battery systems, power conversion equipment, civil works and control architecture. Without structured coordination and clearly defined responsibility across these interfaces, integration gaps can delay commissioning and grid approval.

Compliance verification, system performance testing and operational approval processes are technically demanding and time-sensitive.

For MW-scale, grid-connected installations, consolidated responsibility and disciplined execution are essential to protect schedule and revenue.

Typical risk areas in utility-scale projects include:

Fragmented responsibility across battery, PCS and control systems
Interface gaps between technical and civil scope
Grid code compliance and approval procedures
Alignment of commissioning and performance verification
Delays in interim or final operational approval

Our Role: EPC & System Integrator

BOS Power acts as a single accountable EPC partner for utility-scale, grid-integrated BESS projects in the Nordics.

We assume full design and execution responsibility across all interfaces, from engineering and supplier selection to system integration, commissioning and grid code approval.

Our projects are delivered through a qualified portfolio of Tier 1 battery and PCS suppliers. Technology partners are selected per project and subject to structured technical and financial due diligence, ensuring reliable delivery and long-term performance.

By consolidating responsibility within one contractual structure, we control integration risk, coordinate regulatory processes and secure a predictable path to Commercial Operation Date.

Scope of responsibility

Integrated DC block, PCS and control system
Grid-code compliant system design
Power quality assurance
Full Balance of Plant scope
Cyber & OT security
Lifecycle service integration

Why EPC Responsibility Protects Your Investment

Utility-scale BESS projects represent significant capital commitments. The financial outcome depends not only on equipment performance, but on execution discipline, regulatory approval and timing.

When integration and compliance responsibilities are distributed across multiple suppliers, risk is retained by the asset owner. Delays in approval, performance gaps or coordination failures directly affect revenue generation and return on investment.

An EPC structure shifts this exposure. Responsibility for integration, compliance and commissioning is contractually consolidated, reducing uncertainty in both schedule and cost.

For developers, utilities and investors, this strengthens control over project risk and supports predictable asset performance from day one of operation.

Reduced retained project risk

Greater schedule certainty

Clear contractual accountability

Improved cost predictability

Controlled path to revenue generation

Qualified and financially stable supplier ecosystem

Proven Utility-Scale Experience

BOS Power delivers and executes utility-scale battery energy storage projects across the Nordic region under EPC structures with full system integration responsibility.

At GreenLab Skive in Denmark, BOS Power is delivering a 22 MW / 45 MWh grid-integrated battery energy storage system designed to stabilize renewable generation and provide rapid frequency response.

The installation includes multi-container battery systems, integrated power conversion units and coordinated grid preparation within a consolidated execution model.

Lifecycle & 24/7 Service

Utility-scale BESS assets require structured operational support beyond commissioning.

BOS Power remains engaged after handover, providing lifecycle services across the Nordic region to maintain availability, compliance and system performance.

Service is delivered under defined maintenance procedures and response structures, ensuring continuity and technical oversight throughout the asset lifetime.

Lifecycle responsibility is integrated into our delivery model. System ownership does not end at project completion.

Service Framework

Nordic-based technical support
24/7 response structure
Preventive and corrective maintenance
Performance monitoring and compliance follow-up
Spare parts management
Structured long-term service agreements

System Architecture

Containerized lithium-ion battery systems (DC block)
Power Conversion System including inverter, transformer and switchgear
Medium-voltage grid integration
Energy management and plant control system
Protection and monitoring architecture
Grid code configuration for Nordic TSOs and DSOs
Scalable system design for capacity expansion

Delivery Scope

System engineering and technical design
Supplier qualification and coordination
Balance of Plant integration
Installation supervision and commissioning
Grid compliance documentation and testing

NORWAY
DENMARK
FINLAND
SWEDEN

TOUCH

Kim Strate Kiegstad Head of Energy Storage

Fast charging station | Energy Storage

t. +45 53 60 13 30

Kim Strate Kiegstad Head of Energy Storage

TOUCH

Kim Strate Kiegstad Head of Energy Storage

Fast charging station | Energy Storage

t. +45 53 60 13 30

Kim Strate Kiegstad Head of Energy Storage

TOUCH

Tommi Järviharju Senior Sales Manager Energy Storage

Energy Storage |

t. +358 40 676 1606

Tommi Järviharju Senior Sales Manager Energy Storage

TOUCH

Kim Strate Kiegstad Head of Energy Storage

Fast charging station | Energy Storage

t. +45 53 60 13 30

Kim Strate Kiegstad Head of Energy Storage

FAQ

What is the role of an EPC contractor in a utility-scale BESS project?

An EPC contractor assumes responsibility for engineering, procurement, integration and commissioning of the complete battery energy storage system, consolidating technical and contractual accountability under one delivery structure.

Can utility-scale BESS projects be procured directly from equipment suppliers? Direct procurement is possible. However, integration, grid compliance and performance responsibility must then be managed by the asset owner across multiple suppliers.

What are the main risks in Nordic BESS projects?

Key risks include fragmented integration, grid code approval processes, contractual interface gaps and delays in commissioning. Structured execution and consolidated responsibility reduce these exposures.

How do Nordic grid codes affect battery energy storage systems? Each Nordic country has defined technical requirements for grid support, protection and performance. Systems must be engineered, tested and documented accordingly before final operational approval.

When does an EPC structure make sense for a BESS project?

An EPC model is particularly relevant for MW-scale, grid-connected projects where integration, compliance and execution risk must be managed in a structured manner.

Do you deliver small commercial battery systems? No. BOS Power focuses on MW-scale, grid-integrated battery energy storage systems in the Nordic region.