Site 2.52
Site ID
2.52
Health
COD
2017
Nominal Capacity
90 kWp
Average Specific Yield
1295 kWh/kWp
Total Estimated Loss
49.51%
Possible Gain
2% to 5%
CAPEX, OPEX
2.28 ₹/Wp, 0 ₹/Wp/a
Expenditure / Energy
4.4 ₹/kWh to 1.6 ₹/kWh
Abstract
Installations in high wind zones observed to be bolted through asbestos. Modules with damaged backsheet found on site. It is recommended to (i) assign string labelling, (ii) provide better roof access for easier O&M activities, (iii) replace damaged modules, (iv) retrofit the mounting structure, (v) remove name board from the installation area, and (vi) clean inverter fans and filters more frequently. The estimated production boost expected by the retrofitting actions lies between 5.3% and 6%.
Image gallery
Main Findings
Cable management: Cable layout with cable racking. Missing string labelling.
Foreign object stuck on module glass.
Modules with damaged backsheet found on site.
Inverter fans and filters are soiled.
PV table structures in high wind zones
bolted through asbestos.
Multiple table orientations found on site.
Improper roof access.
Modules shaded by a name board and LA.
Irradiance sensor and LA found on site.
Modules were not soiled due to frequent rains.
IR analysis reveals hot cells from shading.
Impact on Performance
Cell Cracks
The EL image reveals presence of cracks and isolated parts. These defects are expected to impact performance and generate hotspots.
Estimated Loss
≈ 6%
Underperformance
Based on the IV curve measurements, the estimated underperformance is 36% for the measured modules.
Estimated Loss
≈ 36%
Near Shading
According to PVsyst simulation, the near shading losses account to 2.88%.
Estimated Loss
≈ 2.88%
Total Estimated Energy Loss
≈ 49.51%
Proposed Solutions
Strings, tables, and inverters should have a suitable labelling (UV-resistant).
Modules with stuck foreign objects, isolated parts, and damaged backsheet shall be replaced as they pose performance and safety threat.
Inverter fans and filters shall be cleaned more frequently.
The condition of asbestos shall be closely inspected to evaluate its suitability to support tables in high wind zones.
A better roof access shall be provided to facilitate O&M activities.
A re-sorting shall be conducted to have lower performing modules in the same string, or at least the same MPPT.
A re-stringing shall be done to have modules with same orientation in one string, or at least the same MPPT.
If possible, name board and LA shall be relocated so that they do not cause module shading.