Soiling ratio, the fraction of irradiance lost to dust on module glass, drives performance ratio (PR) drift on Indian utility plants. In Rajasthan, Gujarat, and MP, cumulative soiling can suppress 8–25% of annual generation when cleaning stays calendar-based rather than cadence-driven.
PR improvement from cleaning depends on baseline soiling, cycle frequency, and weather. Robotic dry cleaning enables 3–10 cycles per month without wet-wash water, the economical path to neutralise soiling loss on multi-MW fleets.
EPC and O&M teams should tie cleaning evidence to PR recovery: NECTYR block-level logs plus directional ROI from our price guide and calculator before committing CAPEX or Opex.