Technical Assessment
Evaluation of technical aspects, review of simulation, design, BoM, and standards compliance.
Due Diligence / Expert Report
Technical and financial assessment for sound investment decisions.
Investments in solar, BESS, and hybrid projects require careful review of the planning and analysis of potential risks and bottlenecks – due to often high capital investment. Remundo conducts due diligence assessments as an independent technical advisor (Independent Engineer).
Financial Analysis
SWOT analysis, IRR evaluation, CAPEX/OPEX validation, and risk assessment for investors and lenders.
Bankability & Certification
Ensuring bankability, review of certifications and standards, and communication with grid operator.
Scope
What a due diligence covers
Identification of Technical Risks
- Validation of yield forecasts
- Review of grid connection capability
- Verification of CAPEX and OPEX
- Assessment of contractual and warranty risks
- Ensuring bankability
Reviews
- Review of existing simulation and design
- Review of Bill of Material
- Consistency check of cybersecurity concept
- Review of standards and certifications
- SWOT analysis of the project
Coordination
- Communication with grid operator
- Communication with certifiers
- Acceptance and performance tests
- Creation of bankable reports
Solar Scope
PV Due Diligence – Scope
Energy Yield Assessment
- Shading analysis (Horizon + 3D layout)
- DC/AC sizing and mismatch losses
- Temperature coefficients and degradation (linear / non-linear)
- Availability, curtailment risk, and grid losses
- Uncertainty analysis (σ) and sensitivity analysis (±5% GHI, ±1% degradation)
Technical Component Analysis
- Modules: manufacturer bankability, PID risk, LID/LeTID, warranty conditions
- Inverters: LVRT/HVRT compliance, grid code certification, spare parts strategy
Grid Connection & Construction
- Short-circuit capacity at PCC, reactive power requirements, harmonics (THD)
- Load flow, short circuit study, dynamic simulation (RMS/EMT)
- Cable sizing, earthing system, lightning protection, thermography
Acceptance & Performance Tests
- 72h reliability run, PR test per IEC 61724
- Grid dynamics test, protection testing
- Measurement scope adjustable by project size
Battery Scope
BESS Due Diligence – Scope
Battery projects are technically more complex than PV due to electrochemical risks.
Cell & System Analysis
- Cell chemistry (LFP, NMC), cycle life curve, DoD dependency
- Temperature behavior and degradation model
- Roundtrip efficiency, safety certifications (UL, IEC 62619)
Safety Assessment
- Thermal runaway risk and fire load analysis
- Gas detection and fire suppression system
- Clearances per NFPA/IEC, emergency concept
Performance & Market Analysis
- Arbitrage capability, ancillary services market, peak shaving
- Dispatch modeling and degradation optimization
- Dynamic simulation, frequency response, black-start capability
Contractual & Financial Due Diligence
- EPC contract (liquidated damages), performance guarantees
- O&M contract, spare parts strategy, insurability
- PPA structure, grid access costs, subsidy conditions
BESS On-Site Tests
- Capacity test (per IEC 62933)
- Performance test and roundtrip efficiency test
- Black-start test (if required)
Bill of Material
BoM Creation and Review
A complete bill of materials is an essential component for smooth project execution – for coordination between manufacturing partners and trades, and to ensure the correct logistics sequence through to commissioning (CoD, cold and hot commissioning, final IBN).
BoM Review Objectives
- Completeness check (avoid scope gaps)
- Cost validation (CAPEX audit)
- Quantity validation (engineering consistency)
- Standards compliance (IEC, EN, grid code)
- Bankability assurance
- Claims and change order prevention
Typical BoM Gaps
- Cable sleeve quantities and reserve modules
- Spare inverters and spare BMS boards
- Fire suppression certificates
- Spare filters for PCS
- Earthing system complete?
- SCADA redundancy and communication cables
Review Methodology
- Layout vs. cable lengths cross-check
- Transformer capacity vs. AC power cross-check
- Short-circuit and protection review
- Fire and safety review (BESS critical)
- Cross-check with CAPEX
Comprehensive assessment – clear decision.
This assessment gives investors, lenders, and stakeholders a thorough understanding of project risks and opportunities – a critical process that influences decision-making and contributes significantly to project success.