Battery energy storage system services

Technical and economic analysis

Understand whether the proposed BESS project is technically and commercially viable, and identify the factors that may affect cost, benefit and risk.

• Preparation of a feasibility study (comparison of variants, profitability analysis)
• Due diligence (life cycle cost assessment, project risk rating), lender's technical advisory (bankability report)
• Support for the creation of HAZOP
• Evaluation / Implementation FMEA
• Execution of a risk assessment based on IEC 62933-5-1 / ISO 12100

Feasibility study

Examine whether the project can realistically proceed under the expected site, regulatory, environmental and market conditions.

• Analysis of location, property and land use conditions
• Seismic and site-specific considerations
• Regulatory and contractual review
• Balancing market opportunity assessment
• Realisation and operational feasibility review
• CAPEX and OPEX assessment
• Environmental impact considerations
• Technology feasibility evaluation

Technical due diligence

Independently review the maturity, design readiness and implementation conditions of the BESS project to support informed decisions.

• Technical concept and key component review
• Plant design and permit readiness check
• Operation and maintenance concept review
• Assessment of planned battery facility production capacity
• Operational management and maintenance assessment
• EPC and O&M contract evaluation
• Site suitability and zoning review
• Commissioning procedure and result evaluation

Approval process support

Prepare for approvals more efficiently by aligning technical documentation, compliance expectations and authority engagement from an early stage.

• Approval procedure support

• Technical support in discussions with authorities

• Compliance checks and documentation review

• Environmental standards and regulatory considerations

• Pollution control and biodiversity aspects

• Emission control and monitoring support

• Noise and vibration services

• Environmental impact analysis

Grid connection

Meet grid-related requirements with services that support compliance, certification and connection readiness.

• Grid code compliance with EN 50549

• Certification and authorisation procedures in accordance with grid connection regulations such as VDE-AR-N 4110/4120

• Certification according to international standards such as IEC, UL, ISO and IEEE

• Grid code testing services

Process-, occupational- and functional safety

Address technical and organisational safety requirements across the BESS project lifecycle.

• Safety testing of stationary batteries and other storage devices

• Risk identification and mitigation

• EMC and wireless/radio services and approvals in accordance with EN 61000 and IEC 146

• Cybersecurity assessment

• Support in setting up safety management systems

• Expert surveys on HSE topics

Preliminary design support

Strengthen the design basis of the BESS project by addressing regulatory, technical and site-specific requirements at an early stage.

• Support and training on applicable regulations, codes, guidelines and standards

• Advice on permitting, licensing and related legal issues

• Assessment of site conditions, including soil and seismic analysis

• Support during the tendering process

• Verification of warranty and performance data before contract conclusion

Design review and certification

Review the proposed design against relevant requirements to support certification readiness, inspection planning and safe implementation.

• Identification of relevant standards for CE conformity

• Review of engineering and design documentation

• Development of test protocols for inspectors

• Support during tests and inspections to verify compliance with the design

• FAT before shipment and SAT to support safe operation

• CE conformity attestation

Design review of structural and technical fire protection

Evaluate whether structural and technical fire protection measures are appropriate, complete and aligned with applicable requirements.

• Identification of relevant fire protection standards

• Preparation of fire protection concepts and certificates

• Preparation of fire protection reports and assessments

• Review and update of existing fire protection concepts

• Support in planning, selecting and arranging fire protection equipment

• On-site inspections

Supply chain audits

Reduce supply chain risk by assessing supplier capabilities, quality management and the ability to deliver according to project requirements.

• Manufacturer audits

• Review of staff skills, material quality and management systems

• Support in strategic supplier selection

• Check of specifications in tender documents

• ESG audits of suppliers based on recognised industry programmes and schemes, such as SMETA, BSCI and RSCI

• TÜV SÜD supplier checklist assessments

QA/QC in production facility and supervision on site

Support consistent quality during production and construction through independent checks, qualification review and on-site supervision.

• QA/QC during production

• Review of qualification certificates of construction and installation companies

• Verification of material traceability

• Monitoring of execution quality against project planning

Factory Acceptance Test (FAT)

Confirm that equipment and systems function as intended before shipment and meet the specified technical and quality requirements.

• Final inspection at the manufacturer’s workshop before shipment

• Functional verification of equipment or systems in a controlled environment

• Review of specifications and functional test results to confirm compliance and quality

Site Acceptance Test (SAT)

Verify that the installed BESS equipment is complete, properly integrated and ready for safe operation on site.

• Review of warranty and performance data

• Functional and performance tests according to the relevant inspection and commissioning programme

• Verification that quality characteristics such as control accuracy, reaction time, deliverable power and temperature are fulfilled

• Mandatory plant inspections

Final conformity assessment

Confirm that the BESS meets applicable legal and normative requirements before entering operation.

• Mandatory and voluntary tests and certifications

• Final review of technical documentation to confirm completeness and accuracy

• Check that equipment is correctly labelled and marked with the required conformity marks

• Final risk assessments to identify potential hazards and recommend mitigation measures

Performance test

Evaluate whether the system can deliver the expected performance under defined operating conditions and intended use cases.

• Performance testing after construction to verify guaranteed parameters and intended function

• Lifecycle and calendar life testing

• Simulation of specific use cases and system boundaries

• Environmental performance assessments

Monitoring of regular operation and inspections

Maintain safety, compliance and operational reliability through periodic inspections and targeted checks of critical systems.

• Periodic inspection according to DGUV V3

• Regular testing of fire protection systems

• Inspection of ventilation systems

• Fault recorder monitoring at the grid connection point according to grid connection rules

• Assessment of system safety during operation in accordance with VDE AR 2510-50

Additional optimisation measures

Improve operational performance by identifying efficiency gaps, analysing damage patterns and refining maintenance and testing strategies.

• Performance measurements and analysis of optimisation potential

• Systematic damage analysis according to VDI 3822 to determine causes and prevent recurrence

• Evaluation of operation, maintenance and testing concepts to improve economic efficiency

End of operation

Plan the next step for the asset with services that support continued use, ownership changes, modernisation or decommissioning.

• Condition assessment

• Technical due diligence

• Continued operation assessment

• Monetary evaluation of the plant from an electrical engineering and control perspective, for example in the case of a change of owner • Support for modernisation and deconstruction

Battery safety and abuse testing

Assess battery safety under normal, abnormal and misuse conditions to support safer design, compliance and system-level risk management.

• Battery testing against relevant safety and quality requirements

• Testing beyond standard operating conditions

• Dynamic impact tests

Battery performance and lifecycle testing

Verify whether battery performance aligns with specifications across expected use cases and over the intended service life.

• Verification of battery performance against specifications

• Lifecycle and calendar life testing

• Simulation of specific use cases and system boundaries

Battery environmental and durability testing

Evaluate battery reliability under the environmental and mechanical stresses expected during transport, installation and operation.

• Performance and reliability testing under various environmental conditions

• Tests such as vibration, thermal and mechanical shock, EMC, thermal cycling, corrosion, dust, salt and humidity

• Verification of performance under different operating conditions

Battery certification and global supply chain

Support battery compliance, certification and global market access through testing against applicable international standards and transport requirements.

• Testing and certification against applicable requirements, including UL 9540 and UL 9540A where relevant

• IEC 62619

• UN 38.3

• IEC 62620

• Additional energy storage system safety and abuse testing

A battery energy storage system (BESS) stores electrical energy in batteries so it can be used when needed. Battery energy storage system services support BESS projects across the full lifecycle, from feasibility and design review to testing, certification, commissioning and operation. They help organisations address safety, compliance, performance and operational risks.

The required approvals depend on the project location, system design, grid connection requirements and local regulations. A BESS installation may need to address electrical safety, fire protection, environmental requirements, grid code compliance and market-specific certification or approval procedures.

BESS performance is monitored through inspections, operational data, functional checks and performance testing. This helps identify efficiency losses, safety issues, degradation trends and other factors that may affect reliability, compliance or long-term value.

Fire protection risks can be managed through design review, hazard identification, fire protection concepts, testing, inspections and operational controls. A system-level approach is important because battery chemistry, enclosure design, installation conditions and emergency planning all influence fire risk.

An energy storage system is a broader term that can include different storage technologies. A battery energy storage system is a specific type of energy storage system that uses batteries to store and discharge electrical energy.