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String Testing
RPT-2026-012 - performed 16 Jun 2026 by Faisal Shahzad
Health score
83
Measurements taken
6
1 outside reference
Findings
3
Customer visibility
Shared
Measurements
Each reading against the reference it is judged by.
| Measurement | Reading | Reference | Result |
|---|---|---|---|
| Open circuit voltage (string A) | 757 V | Within 5% of design | Pass |
| Short circuit current (string A) | 8.6 A | Within 8% of nameplate | Pass |
| Earth electrode resistance | 7 ohm | Below 5 ohm | Outside reference |
| Insulation resistance (DC+ to earth) | 55 Mohm | Above 1 Mohm | Pass |
| Max module temperature | 67 C | Below 25 C above ambient | Pass |
| Performance ratio on test day | 78% | Baseline 84% | Pass |
Context
- Site
- Hina Qureshi
- Customer
- Hina Qureshi
- Capacity
- 7.5 kW
- Work order
- JOB-2026-0158
- Technician
- Faisal Shahzad
Recommendation
Bring cleaning forward by one cycle and re-torque the affected strings within 30 days.
Score 83 / 100Findings
Defects recorded during this inspection.
Inverter derating in afternoon peak
MajorResolvedUnit throttles above 46 degrees ambient. Cooling fins clogged with dust.
Heavy soiling on lower rows
MinorResolvedDust accumulation reducing output on the two lowest rows more than the rest of the array.
Earthing resistance above limit
MajorOpenMeasured 9.4 ohm against a 5 ohm reference. Earth pit needs re-treatment.