Lithium ion battery storage

Battery Energy Storage Systems (BESS)

End-to-end BESS support from AFRY: strategy, engineering, and delivery

Renewable energy sources like solar and wind are pivotal for achieving a sustainable, low-carbon future, however, their variability demands reliable energy storage solutions.

Battery Energy Storage Systems (BESS) are the key to balancing supply and demand, ensuring grid stability, and accelerating the transition to cleaner energy systems. Whether in large-scale renewable integration, microgrids, hybrid systems, or off-grid applications, BESS also plays a vital role in advancing emerging technologies, transitioning towards a sustainable, and low-carbon energy future.

At AFRY, we support clients across the full BESS lifecycle from early-stage feasibility and system design to commercial strategy, financing, implementation, and optimisation. By combining deep market insight with technical and financial expertise, we help developers, Independent Power Producers (IPPs), utilities, investors, and industrial players unlock the full value of energy storage. Our integrated approach ensures that storage solutions are not only technically secure, but also commercially viable and future-proof. With AFRY as a partner, clients can confidently navigate regulatory complexity, de-risk their investment, and drive the transition to cleaner, more flexible energy systems.

400+ BESS projects across 40 countries

Standalone and hybrid systems (solar, wind, hydro, gas, diesel), grid-scale and behind-the-meter applications

Our track record spans some of the most technically and commercially complex projects in the market, from large-scale energy storage for grid stability and ancillary services to advanced hybrid power plants for islanded microgrids, capacity optimization, and revenue stacking.

With a strong global footprint and deep local expertise, AFRY supports clients across the entire battery energy storage lifecycle. We combine technical excellence with in-depth knowledge of regional energy markets, regulatory frameworks, and client-specific goals. Backed by AFRY’s proprietary fundamental market models, we provide robust, data-driven insights into future revenue streams to support confident investment decisions. As an independent advisor, we deliver unbiased, impact-driven solutions that enable smarter investments, accelerate sustainable growth, and create long-term value.

Composite of solar panels, wind turbines and battery storage in a setting sun

Comprehensive BESS services with AFRY

Market and strategy advisory Arrow

Strategic market entry and business planning for BESS projects

Services

  • Market and regulatory outlook
  • Market attractiveness analysis
  • Advanced techno-economic optimization of hybrid system sizing and power export scheme
  • Bankable revenue projections tailored to site-specific technical characteristics
  • Financial modelling and (Internal Rate of Return) IRR analysis
  • Route-to-market strategy and provider selection
  • Integrated commercial, technical, and environmental due diligence
  • Independent business case risk assessment
  • Market entry strategy and ongoing commercial support
  • Corporate strategy support for developers, IPPs, and utilities

Client benefit

  • Confident investment decisions
  • Bankable business cases
  • Optimised commercial strategy
  • Reduced risk
  • Accelerated market entry and scaling
Development support & technical advisory Arrow

Comprehensive and expert support throughout project development and technical studies

Services

  • Complex techno-economic modelling studies
  • Review of complex use cases
  • Setting up of project definitions, revenue schemes possibilities
  • Technical due diligence
  • Conceptual studies
  • Financial modelling and funding support
  • Site and grid integration, environmental studies
  • Permitting, licensing and approvals

Client benefit

  • Streamlined development process and risk mitigation
  • Partner identification, stakeholder engagement
  • Faster project timelines and higher confidence in outcomes
Engineering & construction Arrow

End-to-end engineering, lender’s advisory, procurement and construction management for BESS and hybrid projects

Services

  • Detailed design (civil, electrical, structural)
  • Owner’s engineering
  • Project management
  • Procurement and vendor evaluation
  • Construction supervision and quality control
  • Installation, testing and commissioning
  • Safety, quality and regulatory compliance

Client benefit

  • On-time, on-budget project delivery
  • High-quality build and reliable operation
  • Seamless integration with existing systems
O&M and asset optimisation Arrow

Ongoing operations, maintenance and performance optimisation for BESS

Services

  • Operations management and monitoring
  • Preventative and corrective maintenance, quality testing
  • Performance analytics and operating expenses (OpEx) optimization
  • Asset management, battery health and lifecycle management
  • Upgrades, repowering and second-life planning

Client benefit

  • Maximised uptime and return on investment
  • Extended asset lifespan and efficiency
  • Adaptability to market changes and new revenue streams
Storage technology

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At AFRY, our ambition is clear: to be a global top-tier trusted partner for energy storage solutions, unlocking renewable potential and enabling a reliable, effective clean energy transition. We offer a one-stop solution that combines market insight, commercial advisory, technical excellence, and environmental expertise.

Proven expertise
Over 20 years of experience, 400+ BESS projects delivered globally across 40 countries. Our BESS team has increased threefold during 2023.

Deep market knowledge
Backed by 150+ local market experts specialising in regulation, strategy, and business case valuation, AFRY brings a 20-year track record in delivering market insights powered by proprietary fundamental models enabling robust long-term revenue projections for battery storage systems. Trusted by leading banks, investors, and developers across the world, engineering excellence for full lifecycle services from advisory to commissioning.

Sustainability leadership
Enabling a low-carbon economy through cutting-edge energy storage solutions

Innovation focus
— Integration of BESS with hybrid, hydrogen, and renewable systems
— Advanced in-house techno-economic hybrid systems simulation and optimisation tools able to stack revenue streams with applications such as:

  • Arbitrage on the electricity spot market
  • Arbitrage on ancillary services (frequency regulation, contingency reserve) markets
  • Energy shifting: Renewable Energy (RE) curtailment reduction, capacity firming of RE, peak shaving, load shifting
  • Power Purchase Agreement (PPA) export to direct off-takers
  • Self-consumption

At AFRY, we are committed to accelerating the energy transition and enabling a net-zero future by advancing renewable energy, optimizing storage solutions, and driving real change towards a cleaner, more resilient energy system for generations to come.

Elon Hägg, EVP and Head of Division Energy

Discover how AFRY’s BESS expertise can power your projects — connect with our experts today!

Petteri Härkki - Head of Renewables & Energy storage
Petteri Härkki
Head of Renewables & Energy storage

Interested in Battery Energy Storage Systems (BESS)?

Contact Us

Please complete the form and send us your proposal. For career enquiries, please visit our Join us section.

Contact Us

Please complete the form and send us your proposal. For career enquiries, please visit our Join us section.