A well-maintained rooftop solar system runs for 25+ years with almost no trouble. Here is exactly what to do — monthly, yearly, and when to call a technician.
Most solar problems in Tamil Nadu are caused by dust, shade or a skipped annual check — not by equipment failure.
Every 2–3 weeks; weekly in dusty months
Dust, bird droppings and pollen can cut output 10–20%. Wash with plain water and a soft cloth or brush early morning or evening — never on hot panels at noon, and never with harsh soap or high-pressure water.
A quick look every few days
Compare daily units generated with the expected figure (about 4.5 units per kW per day in Trichy). A sudden drop usually means dirt, a shading change, a tripped safety switch or an inverter fault.
After pruning or construction nearby
New tree growth, a new water tank or a neighbour's construction can shadow part of the array. Even shade on one panel can reduce a whole string's output, so trim branches and clear obstructions promptly.
Monthly, from the ground
Check that cables are not hanging loose, rodent damage is absent, and mounting bolts and clamps look secure after strong winds or storms. Never open the ACDB/DCDB or touch wiring yourself — call a technician.
Hybrid / off-grid systems only
Keep the battery area dry, dust-free and ventilated; never store items on top of it. Check the app for unusual temperature warnings, and confirm the backup time you get still matches expectations.
Annually, before peak summer
A trained technician should torque-check the structure, test earth resistance, inspect connectors for hot spots, verify protection devices and update inverter firmware. This alone keeps output close to 100%.
Small faults found early cost little; the same faults left alone can idle a whole system for weeks.
Trichy is one of India's sunniest and dustiest districts. Summer dust storms, pollen and bird droppings settle on panels within weeks, and a soiled panel in 40°C heat loses more output than the same panel in a cooler, cleaner district.
The upside: with about 300 sunny days a year, a clean, well-monitored 3 kW system keeps producing roughly 4,900–5,000 units a year. Maintenance is the difference between earning that full yield and quietly losing a fifth of it.
Safety first, always
Panels and DC wiring are live whenever there is daylight. Never open the inverter, ACDB/DCDB or battery enclosure yourself, and never walk on panels. Cleaning and visual checks from the ground are safe; everything else is a trained technician's job.
SVN Renewable Energy maintains rooftop solar and battery systems across Trichy and nearby districts — cleaning, health checks and annual service, including systems installed by others.