Solar Power PlantsSolar power plants / photovoltaic systems), operates outdoors, under high voltage and continuous thermal-mechanical load. Regular inspection prevents efficiency loss, fire risk and legal non-compliance. AES Innovation, your solar power plant... Periodic inspection of electrical installations and PV-specific testing/performance analysis. with our authorized engineers executes.
Short answer: Solar power plant inspections include grounding, switchboard, leakage current, and thermography. electrical controls with string/inverter performance, module and DC arc, etc. PV-specific controls It is a combination of features. The goal: safety, legal compliance, and maximum energy efficiency.
What is a Photovoltaic (GES) Inspection?
A solar power plant inspection is a periodic audit that independently verifies the electrical safety, legal compliance, and energy performance of a solar power plant. It is applied to rooftop, utility, and prosumer installations; it is critical for both safety and return on investment (ROI).
Why is GES (Gas System) Inspection Critical?
- Fire risk: Loose DC connectors and DC arcs are the main causes of solar power plant fires.
- Yield loss: Hotspots, PID, and shading quietly reduce annual production.
- Legal compliance: Periodic inspections of electrical installations are mandatory according to legislation.
- Investment protection: Early detection provides evidence in warranty and insurance processes.
Scope of Inspection
| Electrical controls | PV-specific controls — qualified engineer |
|---|---|
| Grounding and equipotential measurement. | String measurements (Voc, Isc, isolation) |
| Control panel visual and functional inspection | Inverter and MPPT performance |
| Residual/leakage current measurement | Module hotspot and PID analysis |
| Thermographic examination | DC arc, SPD and performance ratio (PR) |
All checks are carried out independently by our authorized engineers.
Technical Test Criteria (IEC 62446-1)
Tests during solar power plant commissioning and periodic inspection are carried out in accordance with IEC 62446-1. Category 1 (minimum test sequence) and Category 2 These are conducted as (extended tests).
| Insulation resistance — system voltage | Test voltage | Minimum resistance |
|---|---|---|
| < 120 V | 250 V | 0.5 MΩ |
| 120 – 500 V | 500 V | 1 MΩ |
| > 500 – 1000 V | 1000 V | 1 MΩ |
| > 1000 V | 1500 V | 1 MΩ |
- Category 1 (minimum): Grounding/equipotential continuity, polarity, junction box, series open circuit voltage (Voc), short circuit/operating current (Isc), function test and DC insulation resistance (section 5.3.4).
- Category 2 (expanded): Series IV curve measurement and wet insulation resistance test (Section 7).
- Thermography: Infrared inspection of modules and connections (IEC TS 62446-3).
Values are summarized based on IEC 62446-1:2016+AMD1:2018; the final test sequence is determined according to the system's voltage class and site conditions.
AES Innovation GES Inspection Process
- Field and document review: Single-line diagram, string plan, and previous reports.
- Visual examination: Modules, cabling, connectors, mounting structures, and panels.
- Electrical measurements: Grounding, leakage current, insulation, and panel checks.
- Thermography: Module, connector, and board temperature scanning (hotspot detection).
- Performance verification: String measurements, inverter data, and PR analysis.
- Reporting: A report listing nonconformities, their priority, and recommendations for corrective action.
Commonly Encountered Nonconformities
- Loose/burned DC connectors and overheating terminals.
- Module throughput loss due to hotspot and PID.
- Interruption in grounding continuity.
- Inadequate or disabled surge protection (SPD)
- Contamination, shading, and mechanical damage.
- Failure to monitor inverter fault logs.
Relevant Standards
GES examination; IEC 62446-1/-3 (commissioning, documentation and thermography), IEC 61730 (module security), IEC 60364-7-712 (PV electrical installation), TS EN 62305 (lightning protection) and is carried out in accordance with the Work Equipment Regulation. Grounding, switchboard, leakage current and thermography Controls are carried out through field measurements.
Frequently Asked Questions
How often should GES (Gastroesophageal Emission) examinations be performed?
Periodic inspections of electrical installations are generally carried out once a year, unless otherwise specified in legislation and standards. Annual periods are recommended for thermography and performance checks.
Who prepares the GES examination report?
Electrical installation checks (grounding, switchboard, leakage current, thermography) of the solar power plant are carried out by our authorized engineers using calibrated devices. PV-specific performance tests are also conducted by our authorized engineers.
Why is thermography important?
Thermography makes hotspot modules, overheating connectors, and panel malfunctions visible before they escalate into fires or significant performance losses.
Frequently Asked Questions
GES (fotovoltaik) muayenesi ne sıklıkla yapılmalı?
Güneş enerjisi santrallerinin elektriksel periyodik kontrolleri ilgili mevzuat ve standartlara göre düzenli aralıklarla (genel olarak yılda bir) yapılır; ayrıca devreye alma ve garanti sonu muayeneleri önerilir.
GES muayenesinde nelere bakılır?
IEC 62446-1 esas alınarak izolasyon direnci, topraklama ve süreklilik, dize (string) ölçümleri, koruma cihazları ve dokümantasyon kontrol edilir; IEC TS 62446-3’e göre termografi ile sıcak nokta taraması yapılır.
GES muayenesini kim yapar?
The inspection is carried out independently by our qualified engineers.
Free: GES Inspection Checklist
Download the practical checklist in 6 sections (field/document, visual, electrical measurement, string/performance, thermography, reporting) as a PDF. It will be sent to your email instantly.