Expert guide from Arun Hitech — V-Guard authorized dealer in Coimbatore since 2014 with 1,500+ Installations across Tamil Nadu.
Answer: Clean solar tubes every 6 months in Coimbatore. Due to high dust levels (especially near industrial areas), tubes accumulate dust that blocks 30-40% of sunlight. Cleaning service costs ₹500-800 and takes 1 hour. DIY cleaning with soft cloth and water works for accessible rooftops.
Monsoon Maintenance (May 2026): During Coimbatore monsoon, ensure backup electric heater is working, check all pipe connections for leaks, clean tubes after heavy rain, and keep the overflow valve clear. Solar heaters still work 60-70% efficiency in monsoon on non-rainy days.