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Assessments
Independent PV expertise
Technical confidence for successful solar projects.
PV yield assessments, glare studies, Technical Due Diligence, engineering, acceptance, commissioning and technical inspections — independent, rigorous and internationally experienced.
Service overview
Technical services across the entire project lifecycle.
From site assessment and engineering to construction and operational inspection. SolPEG’s core services are directly accessible for a quick technical overview.
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Technical Advisory
Identify risks early.
Technical Due DiligenceTechnical risks for investors, banks, developers and operators.
Design Review & engineering reviewIndependent review of layout, components and system sizing.
Construction progress & Mechanical CompletionCompare construction and documentation with design and project requirements.
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Planning & Engineering
From layout to detailed design.
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Inspection & Testing
Measure. Inspect. Diagnose.
Acceptance & commissioningTechnical acceptance, commissioning and verification of operational readiness.
Plant inspection & troubleshootingVisual inspection, electrical testing and systematic fault analysis.
I–V curves & PR evaluationMeasure performance, assess deviations and verify guarantee values.
Thermography & IR droneDetect hotspots and thermal anomalies across the plant.
Electroluminescence (EL)Reveal microcracks, cell breaks and electrically inactive areas.
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Knowledge & Training
Share knowledge. Deepen practice.
Technical knowledge & publications
Methods. Measurements. Technical papers.
Yield forecasting, data quality, shading and modelling — selected technical posters and publications from SolPEG’s engineering practice.
Explore knowledge PVsyst training Understand, not just operate.Practice-oriented training for project developers, designers and engineers — from modelling and weather data to shading and loss analysis.
View training
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Solar Power Expert Group
YIELD
P50 / P90
DESIGN
QA / QC
Analyse rigorously.
Assess independently.
A photovoltaic plant is not only a technical system, but a long-term investment. Yield assumptions, system design and construction quality determine its economic performance.
Since 2008, SolPEG has provided the independent technical basis for sound decisions — from initial project assessment to inspection of the completed plant.
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Service areas
Four areas of expertise.
One engineering perspective.
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Assessments
Independent assessments of yield, site and project assumptions as a robust basis for design, financing and investment decisions.
- PV yield assessment
- Yield forecasts & feasibility studies
- Glare & reflection studies
- Site & shading analyses
- Review of existing assessments
- Recommendations for design optimisation
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Technical Advisory
Identify technical risks early and support robust decisions — for investors, banks, project developers and operators.
- Technical Due Diligence
- Design Review
- Review of design documents
- Review of third-party assessments
- Construction progress monitoring
- Mechanical Completion
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Planning & Engineering
Technical engineering with yield in mind — from early system design to construction-ready documentation.
- Concept & detailed design incl. bills of materials
- CAD module layout & mounting arrangement
- Module-to-inverter allocation
- String design
- DC cable sizing & loss calculation
- Single-line diagrams, AC cables & monitoring
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Inspection & Testing
Independent inspection of construction quality, safety and performance — from acceptance and commissioning to operation, performance guarantees and troubleshooting.
- Intermediate, partial & final acceptance
- Commissioning & technical operational readiness
- Electrical measurements & I–V curve tracing
- EL testing / electroluminescence
- Thermography incl. IR drone inspection
- PR test & PR evaluation / performance guarantee
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Engineering practice
From simulation to the plant.
Engineering does not end on the screen.
SolPEG combines modelling and technical analysis with inspection of real plants. Measurements, electroluminescence, thermography — including IR drone inspections where appropriate — and on-site checks turn assumptions into robust technical findings.
Images from the SolPEG project archive.
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Selected projects
Experience that can be
measured in projects.
Five selected references show different scales, countries and system concepts — from utility-scale solar parks to rooftop and greenhouse installations.
Clients & commissioning parties
An excerpt from our track record.
Solar-sector companies for which SolPEG has provided assessments, engineering, Technical Advisory or technical inspection services.
Historical track record
The SolPEG reference archive also includes, among others, SunEdison, solarhybrid and Colexon.
Selection from the SolPEG reference archive. Company names and trademarks belong to their respective owners.
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Why SolPEG
Independent by principle.
No vested interests.
Only robust results.
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Independent
Manufacturer-independent assessments, traceable assumptions and transparent results.
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Sound
Professional simulation tools, established data sources and many years of engineering experience.
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Practice-oriented
From the digital plant model to on-site inspection — theory and reality are brought together.
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International
Experience from PV projects in more than 60 countries, across different scales, technologies and climate zones.
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Knowledge & publications
Technical knowledge from engineering practice.
Technical work worth
reading.
Yield forecasting, data quality, shading and modelling have been part of our work for many years. Selected conference posters document methods, measurements and technical questions from SolPEG projects.
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Measurement and PVSyst simulation of shading losses
Measurement data and simulation are compared to assess shading losses more realistically.
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Reliability of yield forecasts
Comparative simulations show how data basis, module model and simulation settings affect results.
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Low-light behaviour and data quality
On the importance of robust module data for realistic yield forecasts beyond standard test conditions.
07 · PVsyst Training
Understand, don’t
just operate.
Practice-oriented PVsyst training for project developers, designers and engineers — from modelling and weather data to shading and loss analysis.
View training ↗→Project inquiry
Your project. Our expertise.
Talk to us about your PV project.
Assessments, Technical Advisory, engineering or inspection — briefly describe the task. We will respond with a technical view of the appropriate scope.