Technical Assessment
Evaluation of technical aspects, review of simulation, design, BoM, and standards compliance.
Due diligence & expert opinions
Technical and financial review for sound investment decisions.
Solar, BESS and hybrid projects tie up large sums. Remundo reviews design, risks and bottlenecks as an independent technical adviser (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
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 storage
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
A clear picture. A clear decision.
Our assessment gives investors, lenders and project parties a reliable view of risks and opportunities.