BESS Technical Due
Diligence & Advisory
KRD Renewables provides independent BESS technical due diligence for investors, lenders, developers and IPPs across Poland and Central and Eastern Europe.
We assess project maturity, technology, grid connection, permitting, contracts, performance assumptions and supplier-related technical risks to support informed acquisition, financing and investment decisions.
KRD’s BESS technical due diligence assesses the technical maturity of battery energy storage projects and identifies issues that could affect project value, financing, delivery or long-term performance.
The review can cover project documentation, permitting, land and grid arrangements, BESS technology and design, system performance assumptions, supplier warranties, project contracts and technical assumptions within the financial model.
For standalone BESS projects, KRD’s TDD service can be structured in two independent phases, which may be contracted separately or sequentially depending on the transaction and the level of review required.
BESS Technical Due Diligence
PHASE 1 - RED FLAG ANALYSIS
Typical Scope Includes:
High-level review of key documentation available in the VDR
Identification of critical technical, permitting, land and grid-related risks
Review of environmental decision and zoning status
Land lease structure and plot consistency check
Review of grid connection and agreement status
High-level assessment of project layout maturity and installed capacity, including MW / MWh
Headline assessment of storage duration, usable energy, round-trip efficiency and the proposed charging and dispatch strategy
Identification of missing information and administrative gaps
Deliverable:
Concise Red Flag Memo with structured risk classification (None / Minor / Medium / High), highlighting material risks, information gaps and mitigation considerations.
PHASE 2 - FULL TECHNICAL DUE DILIGENCE
Typical Scope Includes:
In-depth review of issued permits, licences and compliance status.
Review of outstanding permits and realistic permitting timelines to COD.
Grid interconnection and contractual review, including review of connection conditions, grid agreement and technical obligations.
Consistency check between permits, land title, project layout and grid capacity.
BESS technology and design assessment, including cell and rack selection, PCS/EMS/BMS interfaces, degradation, augmentation, supplier warranties and fire-safety assumptions
Review of MW/MWh, usable energy and storage duration, including charging/import and dispatch/export limits at the grid connection point
Review of cycling, availability, round-trip efficiency, usable capacity and operating-strategy assumptions over the asset lifetime
High-level review of CAPEX and OPEX assumptions from a technical perspective.
Review of key project contracts from a technical perspective, where available, including EPC, BoP, supply and O&M documentation.
Identification of key technical, grid and permitting constraints affecting value or schedule.
Identification of key project risks, mitigation measures and residual exposures.
Deliverable:
Full TDD report supporting acquisition or investment decisions, incorporating client comments
Due Diligence Focus Areas
01
Supplier & Manufacturer Due Diligence
BESS project risk is influenced by the capability of the proposed equipment suppliers, manufacturers and system integrators. KRD reviews available supplier and technology information to identify material gaps and assumptions requiring further clarification.
Focus areas
- Supplier and manufacturer capability
- Battery cells, racks and system architecture
- Technical documentation and supporting evidence
- Warranty conditions and supplier responsibilities
02
Procurement & Technology Assessment
KRD reviews technology and procurement assumptions that may affect project performance, delivery and transaction risk. Where relevant, the review can also consider documentation required for Battery Passport Readiness for BESS.
Focus areas
- Cell and rack selection
- PCS / EMS / BMS integration
- Performance, degradation and augmentation assumptions
- Fire-safety, certification and warranty requirements
- Supply, EPC, BoP and O&M interfaces
03
Technical Due Diligence for Investors, Lenders & IPPs
KRD’s BESS technical due diligence supports investment, financing, acquisition and development decisions. The assessment tests whether material technical and contractual assumptions are consistent with the proposed investment or project case.
Focus areas
- Material technical risks
- Key project and performance assumptions
- Supplier and technology dependencies
- Grid and permitting dependencies
- Mitigation measures and residual exposure
04
What KRD Assesses During BESS Supplier Due Diligence
The precise scope depends on the project, technology and information available. The review focuses on whether supplier information, proposed technology and project assumptions are sufficiently aligned for the stage of development or transaction.
Focus areas
- Technical documentation and certification evidence
- Usable energy, duration, efficiency and availability
- Degradation, cycling and augmentation assumptions
- Supply and contractual interfaces
- Safety, compliance and transaction risk
Optional Scope of Work
Site Visit
Visual inspection of site conditions, access, grid connection point and surroundings, with photographic record.
Environmental & Land Lease Review
Combined high-level screening of environmental decisions and land lease documentation, from a technical (non-legal) perspective.
EU Battery Regulation
From 18 February 2027, industrial batteries above 2 kWh will require an electronic Battery Passport under Regulation (EU) 2023/1542.
For utility-scale BESS projects, this introduces additional requirements around technical documentation, battery data, evidence and supplier responsibilities. KRD provides independent Battery Passport Readiness assessments to identify relevant documentation and implementation gaps before procurement, financing or investment decisions are finalised.
Why KRD
Proven track record in standalone BESS technical due diligence. 6.2GWh+ of BESS projects supported in Poland.
Deep knowledge of grid connection procedures, curtailment risks and permitting processes.
Multidisciplinary team combining BESS technology, grid, permitting and regulatory expertise.
Advisory approach focused on material risk and investment relevance, not box-ticking.
Some Previous BESS Projects
