A 5MW commercial rooftop in Chennai was steadily losing generation to heavy soiling and hard-water scale. The client’s quarterly reports masked the decline behind healthy monthly averages, so the shortfall only surfaced during a routine benchmark review.
The challenge
Coastal humidity and construction dust combined to form a stubborn film over the modules that rainfall alone could not clear. Fixed calendar-based cleaning was leaving the array below its recovery threshold for weeks at a time, and the soiling ratio was climbing faster than the maintenance schedule could react.
Our approach
SolarTrust introduced site-specific cleaning cycles driven by measured soiling rates rather than the calendar. Demineralised water and industry-grade chemical washing removed scale and grime without stressing the module glass, while reference-cell tracking confirmed the recovery after each pass.
Results delivered
- 99.1% uptime stabilized across the full array.
- +₹42L in additional annual generation value.
- Soiling losses cut to less than half their original levels.
