The onset of the Indian monsoon season brings the promise of the first rain showers, an opportunity for respite, enhanced greens, and a dip in temperatures. For people with a solar rooftop system, the rains present a unique level of challenge and promise. Many people believe that solar rooftops are a set-and-forget type of equipment. In truth, solar panels require special attention during the monsoon season to avoid drop in performance.  

This blog attempts to answer the reasons for the special attention needed to be paid to solar panels during the Indian rains, the issues to be careful of, and the steps that can be taken to save energy and costs.  

Do Solar Panels Stop Working in the Rain?  

This is a question almost every homeowner asks. The short answer is, no. During monsoon season, solar panels do not stop functioning.  

Solar panels generate electric powers during sunlight and not heat.  

Cloudy and rainy days do not pose a challenge for panels, as they can still capture diffuse sunlight (light that has been scattered in the atmosphere).  

While efficiency does drop during these days (20-40%), the panels remain functional. Thus in this case, the challenge is not use or no use. The real question shifts to how rain and moisture, along with storms, affect the wellness and efficiency of your system.

The Indian Monsoon’s Distinctive Difficulties for Solar Panels

The Indian Monsoon, unlike the rain that other countries experience, the monsoon is accompanied with winds, intense downpours, air humidification, as well as dust storms. the Indian monsoon poses a number of challenges for solar panels. The Indian monsoon provides a number of challenges for solar panels.  

1. Higher Cloud Density & Reduced Solar Production  

For the duration of the second quarter of the year, sunlight is accessible for a shorter time period. Solar panels that used to generate full power now, because of the clouds, generate only a fraction of the previous power.  

2. Moisture & Corrosion Issues  

The humidity challenges for the other Indian states, especially the coastal ones, comes in the form of moist air. The moist air can seep into the solar panels’ joints, wiring, and inverters. This leads to rust as well as leakage.  

3. Strong Winds & Loose Solar Panels  

The monsoon winds can be very strong where I currently live, especially towards the coastal and hilly regions. If the solar panels are loose, the strong winds can vibrate the panels to a point where they break.  

4. Waterlogged in Rooftops  

The solar panels that are placed flat to the roof are designed to capture the water for the rain to not directly fall. If the rain seals the inverters, then there can be short circuits.  

5. Storm Dust & Debris  

The rain is responsible for both dirt and mud, as well as leaves. The mud and dirt blocks the solar panels and hinders the efficiency of sunlight. The rain leaves dirt on the panels, and as a result solar panels become dirty.

6. Lightning Strikes & Power Surges  

Thunderstorms often occur during the Monsoon season. Lightning striking can damage sensitive machinery without proper earthing or surge protection.  

How to Maintain Solar Panels During Monsoon  

Maintenance of solar panels during monsoon season is not too difficult. All it needs is some vigilance and routine inspections.  

1. Cleaning Goes Beyond The Rain  

Assuming that rainwater rinses away all dirt is a common misconception. Rainwater often leaves remnants of dirt or grime.  Make it a practice to wipe the glass surface every 10 to 15 days with soft water and a microfiber cloth.  

For larger systems, it is advisable to hire professional cleaning services.  

2. Look For Water Leaks  

Examine the junction boxes and other connections for leaks.  Protective coverings or silicone sealants can water proof these junction boxes.  

It is also essential to place inverters in covered areas or indoors.  

3. Increase The Mounting Stability  

The installer should evaluate the mounting structure before the rains come.  Rust resistant stainless steel or galvanized iron frames can greatly improve the lifespan of the solar panels.  

Use tightened bolts to improve wind resilience.  

4. Improve Drainage Of The Roof  

Prevent the drains from the rooftop from getting clogged to improve waterlogging.  If water settles around the base of the panels, enhance the mounting height.  

5. Use Surge Protection  

Lightning strikes can be avoided using SPD devices (Surge Protection Devices).  Make sure that these systems are well earthed.  

6. Solar Batteries & Inverters  

Properly ventilated areas are suitable for keeping the batteries dry.

• Avoid placing inverters in humid locations.  

• Conduct checks before the rainy season.  

• Professional inspections should be scheduled.  

• Regular checks can be performed by certified installers.

• This can greatly reduce repair costs.  

Why This Care is Needed  

Moisture and rust can damage solar installations. This damage can hinder your system's expected lifespan of 20-25 years.  

Well-maintained solar panels work better even on cloudy days. Clean panels can yield an extra 10-20% of electricity.  

Well-maintained systems can eliminate the risk of shocks, short circuits, and electrical hazards on rooftops.  

Routine checks can eliminate the risk of breakdowns in bad weather providing greater assurance.  

 myths around solar panels during the rainy season  

Myth 1: Solar panels don’t work in the rainy season.  

Working panels can operate, but will be less efficient.  

Myth 2: Rain will automatically clean the panels.  

While rain can assist in cleaning, it can leave behind residue and dirt.  

Myth 3: Installing solar before monsoon is a waste.  

The panels will provide paybacks immediately. Net metering can allow savings to be accumulated during summer to offset losses during the rainy season.

Conclusions

The Indian monsoon brings both benefits and challenges for solar panels. While the rains cut down dust accumulation and cool the panels, they also bring moisture, storms, and reduced sunlight hours. The positive news is that solar panels can stand up to harsh weather. With some additional cleaning and professional upkeep, your system will perform optimally during the monsoon and through the rest of the year. 

Treat monsoon maintenance as a seasonal health check for your solar system. It protects your investment and keeps the clean, renewable power accessible for the family during even the rainiest days.