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 Taypro Opex.