UnderperformanceYield
Causes of PV underperformance
Shading, degradation, string faults, inverters—how to systematically narrow down the cause.
DamageInsurance
PV damage report: when do you need it?
When insurance, warranty or disputes are involved: which evidence really counts.
MonitoringExpert report
Monitoring vs expert report
Monitoring shows deviation—an expert report proves the cause and quantifies the effect.
FAQ – short answers
New in knowledge
Two new pages: expert profile and MC4 guide.
What does a PV expert report cost?
It depends on system size, data availability and the question. A short free initial clarification to estimate effort is best.
How fast can a report be produced?
If documents/monitoring are available, an initial technical assessment can be done quickly. On-site visits depend on scope.
Is this suitable for insurers/disputes?
Yes—the methodology is designed for traceable documentation.
Free initial assessment
Send the key details (system, issue, period) and I’ll tell you whether and how a report makes sense.
Email: info@gutachterpv.org