Introduction

During the rainy season in Nigeria, many solar users experience:

❌ slow battery charging
❌ lower solar power output
❌ inverter beeping
❌ insufficient daytime charging
❌ fast battery drain
❌ more PHCN/generator usage

This is normal — the rainy season reduces the amount of sunlight available for solar panels.

However, with proper maintenance and smart usage, you can keep your solar system performing efficiently.
In this guide, Solarzone Nigeria explains how to maintain your solar panels during the rainy season.

⭐ 1️⃣ Clean Your Solar Panels Regularly

Even though rain washes panels, it doesn’t clean them properly.

Rainwater leaves behind:

• dirt streaks

• mud stains

• dust residue

• dried watermarks

These reduce solar output by 20–40%.

✔ Cleaning Tips:

• Use soft cloth or microfiber

• Use clean water only

• Avoid soap or detergents

• Clean early morning or evening (not under hot sun)

• Avoid scratching the surface

Clean panels = faster battery charging.

⭐ 2️⃣ Trim Plants and Trees That Cause Shading

During rainy season, plants grow faster and may create shading.

Shading reduces solar output drastically.

✔ Trim trees
✔ Cut tall grasses
✔ Remove structures blocking sunlight

Even a small shade affects the entire panel string.

⭐ 3️⃣ Check and Tighten All Solar Connections

Humidity during rainy season affects wiring.

Loose or wet connections cause:
❌ low output
❌ burning smell
❌ inverter errors
❌ slow charging

Check:
✔ MC4 connectors
✔ solar cable joints
✔ panel-to-panel links
✔ roof mounting points

Solarzone can help inspect and correct all wiring.

⭐ 4️⃣ Inspect MPPT / Charge Controller for Errors

Rainy season affects:

• voltage input

• charge current

• panel efficiency

If MPPT shows:
❌ low input
❌ fluctuating current
❌ error codes

You need servicing or configuration adjustment.

Solarzone can reprogram MPPT settings.

⭐ 5️⃣ Increase the Number of Solar Panels (If Needed)

Rainy season reduces sunlight intensity by 30–60%.

If your solar system struggles during this period, you may need:
✔ additional panels
✔ higher wattage panels
✔ better panel arrangement

Adding more panels ensures:
✔ faster charging
✔ stronger output
✔ stable daytime usage

Solarzone can inspect your system and recommend upgrades.

⭐ 6️⃣ Reduce Your Daytime Load During Cloudy Hours

To avoid battery draining:

❌ avoid using heavy appliances early morning or late afternoon
❌ reduce AC usage during cloudy hours
❌ minimize freezer door opening
❌ schedule laundry/pressing for sunny days

✔ use appliances between 10am – 4pm for best results.

⭐ 7️⃣ Protect Panels and Wiring From Heavy Winds

The rainy season often comes with strong winds.

Check:
✔ roof mounting brackets
✔ bolts and nuts
✔ rail clamps
✔ ground-mounted structures

Loose panels can shift or detach.

Solarzone offers panel re-tightening and mounting inspections.

⭐ 8️⃣ Ensure Proper Tilt Angle for Maximum Sunlight

Solar panels need the right tilt to capture weak sunlight during rainy season.

Best angle for Nigeria:
➡ 10° – 15° tilt

A good tilt helps:
✔ rain wash dirt downward
✔ panels dry faster
✔ better sunlight absorption

Solarzone adjusts panel angle during maintenance visits.

⭐ 9️⃣ Check for Water Leakage on Roof or Wiring Box

Rainwater can damage:
❌ DC breakers
❌ junction boxes
❌ MC4 connectors
❌ panel backsheet

This leads to errors and system damage.

Inspect:
✔ rooftop sealing
✔ waterproof connectors
✔ isolators
✔ cable glands

Water entry can cause long-term damage.

⭐ 🔟 Adjust Inverter Charging Settings for Rainy Season

Lithium batteries need:
✔ correct cutoff
✔ correct charging voltage
✔ correct current limit

Solarzone adjusts:

• PV priority

• Grid charging

• Battery cutoff

• ECO mode

To optimize performance during rainy weather.

⭐ 11️⃣ Monitor Battery Voltage Regularly

During rainy season, batteries may:

❌ not charge fully
❌ drain faster
❌ reach low voltage quicker

Monitor:
✔ charging voltage
✔ night discharge
✔ battery temperature

If voltage drops too low, call Solarzone immediately.

⭐ 12️⃣ Install Weatherproof Mounting & Cable Protection

Rain affects:
✔ exposed cables
✔ junction boxes
✔ MC4 connectors
✔ isolators

Use:
✔ UV-rated solar cables
✔ waterproof connectors
✔ corrosion-proof mounting

Solarzone installs proper protection against rain damage.

⭐ Why Solarzone Is the Best for Rainy Season Solar Maintenance

Solarzone provides:

⭐ full solar system inspection
⭐ panel cleaning & angle adjustment
⭐ wiring correction & waterproofing
⭐ MPPT & inverter configuration
⭐ battery charging optimization
⭐ panel expansion for rainy season
⭐ fast troubleshooting & repairs

We ensure your solar performs at full capacity despite cloudy weather.

🏁 Final Thoughts

Rainy season challenges solar systems, but with proper maintenance your system will remain:

✔ efficient
✔ stable
✔ long-lasting
✔ reliable

Take the right steps to keep your solar performing well all year.

Let Solarzone Nigeria maintain and fine-tune your system for maximum output.

💥 Call to Action

⚡ Need rainy-season solar maintenance or panel cleaning?
Contact Solarzone Nigeria today for inspection, servicing, and system optimization.

📞 Call/WhatsApp: 09091394722