Introduction

Is your battery not charging well during the day?
Does your inverter show low charging current such as 1A, 2A, 3A instead of 10A–30A?

Low solar charging is one of the most common issues faced by Nigerian solar users — especially during rainy season or when the system is poorly installed.

In this guide, Solarzone Nigeria explains why solar charging becomes low and how to fix the problem effectively.

⭐ 1️⃣ Dirty Solar Panels (Most Common Cause)

When panels are covered with:

• dust

• dirt

• bird droppings

• mud

• oil particles

Solar charging drops by 20–50%.

✔ Fix:

• clean your panels every 2–4 weeks

• use clean water and soft cloth

• avoid detergent or abrasive tools

Clean panels = stronger charging.

⭐ 2️⃣ Poor Sunlight / Rainy Season

In rainy/cloudy seasons, sunlight reduces drastically.

✔ Signs:

• charging current drops

• batteries take longer to charge

• inverter stays at low voltage

• panels never reach full output

✔ Fix:

• add more panels

• reduce daytime load

• use high-efficiency monocrystalline panels

• upgrade MPPT controller

Solarzone can size your system correctly for all seasons.

⭐ 3️⃣ Wrong Panel Installation Angle

Panels installed flat or at the wrong angle produce low power.

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

✔ Fix:

Have Solarzone adjust your panel tilt to maximize production.

⭐ 4️⃣ Shading on Panels

Even a small shade from:

• trees

• buildings

• tank stand

• DSTV dish

• water tank

• roof extension

can reduce panel output by up to 70%.

✔ Fix:

• remove shading

• trim trees

• relocate panels if necessary

Panels MUST see clear sky to work well.

⭐ 5️⃣ Faulty or Low-Quality MC4 Connectors

Burnt or weak MC4 connectors cause:
❌ low voltage
❌ unstable charging
❌ overheating

✔ Fix:

• replace MC4 connectors

• ensure tight fitting

• use high-quality connectors

Solarzone uses industrial-grade MC4 connectors.

⭐ 6️⃣ Wrong Wiring Configuration (Series/Parallel)

Incorrect series/parallel wiring reduces:
✔ voltage
✔ amperage
✔ overall panel output

Symptoms:

• battery charges slowly

• inverter shows low PV voltage

• MPPT produces low current

✔ Fix:

Solarzone rewires panels to maximize voltage and current to MPPT.

⭐ 7️⃣ Bad or Undersized Solar Cables

Thin wires cause:

• voltage drop

• heat

• power loss

• slow charging

• MPPT malfunction

✔ Fix:

Use:
✔ 6mm
✔ 10mm
✔ 16mm

solar-rated copper cables.

⭐ 8️⃣ Faulty Charge Controller (PWM/MPPT)

If your MPPT/PWM fails, charging becomes extremely low.

❌ Signs of faulty MPPT:

• inconsistent charging

• constant low amperage

• overheating

• error code

• battery stuck at low voltage

✔ Fix:

• replace with high-quality MPPT

• upgrade MPPT size

• ensure correct settings

Solarzone installs top MPPT brands like SRNE, Victron, Growatt.

⭐ 9️⃣ Under-Sized Solar Panels

If your installer used too few panels, your system will NEVER charge well.

✔ Minimum panel recommendations:

• 3.5kVA inverter → 4–8 panels

• 5kVA inverter → 6–12 panels

• 7.5kVA inverter → 10–16 panels

• 10kVA inverter → 16–24 panels

If you have fewer panels than the above → charging will always be weak.

⭐ 🔟 Panels Are Old or Damaged

Over time, solar panels lose efficiency.

Low-quality panels may:

• crack

• delaminate

• lose output

• burn internally

✔ Fix:

Replace old or damaged panels with new monocrystalline panels.

⭐ 11️⃣ Poor Roof Positioning

Panels facing:
❌ north
❌ east (full shade)
❌ west (late sun only)

produce low output.

Best direction:
➡ South-facing panels in Nigeria

Solarzone relocates and repositions panels for maximum sunlight exposure.

⭐ 12️⃣ Incorrect MPPT Settings

If MPPT is set wrongly:

• low charging

• wrong battery type

• limited current

• wrong float/boost voltage

✔ Fix:

Solarzone reconfigures:
✔ battery voltage
✔ charge current
✔ solar priority
✔ float & bulk charging

Correct settings boost performance.

⭐ When to Call Solarzone for Help

Call Solarzone if you notice:
✔ battery not reaching 100%
✔ solar charging current too low
✔ inverter beeping early
✔ battery draining fast
✔ MPPT fluctuating
✔ charging stuck at 1–3 amps
✔ solar not charging at all

We offer:
⭐ MPPT replacement
⭐ panel expansion
⭐ wiring correction
⭐ panel cleaning
⭐ full system diagnosis
⭐ inverter reconfiguration
⭐ battery upgrade
⭐ rooftop inspection

🏁 Final Thoughts

Low solar charging is caused by:
✔ dirty panels
✔ bad weather
✔ wrong wiring
✔ weak MPPT
✔ insufficient panels
✔ shading
✔ old or faulty components

The good news?
Almost all solar charging problems can be fixed.

Let Solarzone Nigeria inspect and restore your solar system for maximum charging output.

💥 Call to Action

⚡ Experiencing low solar charging?
Contact Solarzone Nigeria now for fast diagnosis and system optimization.

📞 Call/WhatsApp: 09091394722