Expert Assessors for Photovoltaics and Battery Storage

At a Glance: We are an independent expert assessment office for PV systems and utility-scale battery storage (BESS). TUV-certified expert assessors prepare court-admissible reports per DIN VDE standards — operating Europe-wide with offices in München, Frankfurt, and Stuttgart.

TUVcertified
100%manufacturer-independent

Technical Assessment Process — PV & BESS Reports

🔍
1

Project Analysis

Scope & Objective

Definition of the assessment scope, review of existing documentation, determination of the report type and schedule.
📄
2

Document Review

TAB, Standards

Review of design documents, TAB conformity, datasheets, and certificates against applicable standards (IEC, DIN VDE).
👁
3

On-Site Inspection

Visual Assessment

Visual assessment of the system, inspection of mounting, cabling, and components for defects and standard violations.
⚡
4

Measurement Methods

EL, IV, IR

Electroluminescence, IV curve measurement, thermography, insulation resistance — multi-method approach for maximum fault detection.
▼ ▼ ▼ ▼
📈
5

Data Analysis

Correlation

Statistical evaluation of measurement data, correlation with yield data, identification of degradation and anomalies.
⚠️
6

Risk Assessment

Matrix

Risk matrix based on probability and severity. Prioritization of defects with concrete remediation recommendations.
✅
✓

Expert Report

DIN VDE compliant · court-admissible

Complete assessment report with photo documentation, measurement results, evaluation, and action plan — admissible in court.

Our Assessment Services

Specialized in photovoltaics and battery storage — click a category

📈

Yield Assessment

Evaluation of actual system performance. Comparison of expected vs. actual yield using meteorological reference data and STC back-calculation.

DIN VDE 0100-600 Performance Ratio Defect Analysis
Learn more →
🔥

Damage Assessment

Root cause analysis for fire, hail, and lightning damage. Court-admissible documentation with damage quantification and liability assignment.

Court-admissible Causality Chain Insurance
Learn more →
✅

Acceptance Inspection

Independent acceptance inspection for new installations or acquisitions. Drone thermography, EL measurement, IV curve analysis per current standards.

VdS 3602 DGUV V3 Drone + EL
Learn more →
🔎

Technical Due Diligence

Technical assessment for investors and banks. Bankability reports, revenue assessments for FCR, aFRR, mFRR, and arbitrage strategies.

Bankability Revenue Assessment Risk Assessment
Learn more →
⚡

Commissioning

Acceptance reports for new construction. Capacity measurement, SOH determination, and safety assessment with BMS functional testing.

IEC 62619 SOH Test BMS Testing
Learn more →
💥

BESS Damage Assessment

Damage analysis for thermal runaway, BMS failures, and cell defects. Causality chain, damage quantification, and AwSV assessment.

Thermal Runaway TA Lärm AwSV
Learn more →

Request a Free Consultation

Describe your situation — we will respond within 24 hours with an initial assessment and a transparent fixed-price quote.

Get in Touch

Last updated: 2026-06-16