Jodhpur sits on the eastern edge of the Thar desert. Fine airborne dust is a constant, it peaks in the pre-monsoon months, and it settles on horizontal glass. That is the environment your array lives in.
Soiling reduces output because dust scatters and blocks light before it reaches the cell. The loss is gradual, which is exactly why it goes unnoticed — nothing breaks, no alarm sounds, the system simply produces less each week than it did the week before. Homeowners often only discover it when they compare a monthly generation figure against the same month a year earlier.
The good news is that it is completely reversible. Cleaning restores output; there is no permanent damage from dust alone. What does cause permanent damage is cleaning it badly.
There is no universal number, and anyone quoting one has not seen your roof. What actually drives the interval:
For most residential rooftops in Jodhpur a scheduled clean several times a year, with extra attention through the dusty months, is a sensible starting point. We set the actual schedule from what we see at your site rather than applying a generic one.
If you are cleaning your own array, the things that matter:
We clean systems in Jodhpur whether or not we installed them. Cleaning is included during the AMC period for our own installations — see solar maintenance in Jodhpur.