Aaj ke time mein solar street lights villages, societies, farms, parking areas aur commercial zones mein bahut common ho chuki hain. Lekin kabi-kabi ye kaam karna bandh kar deti hain. Achhi baat ye hai ki 80% problems ghar par hi fix ho sakti hain.

Iss guide mein hum step-by-step dekhenge ke solar street light not working issue ko kaise diagnose aur fix karein.

⭐ 1. Check the Solar Panel – Dust, Tilt, Light Exposure

Solar street light tabhi sahi charge hoti hai jab panel ko proper sunlight (5–6 hours) mile.

✔ Common Issues:

• Panel dhool, mitti ya bird droppings se covered
• Panel shadow mein hai (tree shade, pole shadow, building)
• Solar panel ka tilt angle galat

✔ Solution:

• Panel ko clean microfiber cloth se saf karo
• Panel ko south-facing direction mein lagao
• Tilt angle approx 25–30° rakho
• Ensure no shadow during 11 AM–3 PM

⭐ 2. Battery Not Charging – Main Reason for Light Failure

Solar street lights generally Lithium (LiFePO4) ya Lead Acid batteries use karti hain.

✔ Symptoms:

• Light sirf 30 minutes chalti hai
• Shaam ko ON hi nahi hoti
• Raat ke beech band ho jaati hai

✔ Fix:

• Battery terminals check karo (rust/loose connection)
• Multimeter se battery voltage check karo
  • LiFePO4: 12.8V – 13.6V
  • Lead Acid: 12.5V – 13.5V
• Low voltage ho toh battery replace karein
• 3–4 saal purani battery mostly weak ho jaati hai

⭐ 3. LED Light or Driver Failure

LED bhi kabhi-kabhi burn out ho jaata hai ya driver circuit fail ho sakta hai.

✔ Symptoms:

• LED blink hoti hai
• Light ON hoti hai but kuch seconds baad band
• Only half LEDs glow

✔ Fix:

• LED board check karo
• Driver replace karo (cost 150–500 Rs)
• Short-circuit ya burn marks par dhyan do

⭐ 4. Solar Charge Controller Issue

Controller system ko manage karta hai — panel se battery aur battery se light ko.

✔ Symptoms:

• Battery charge nahi hoti
• Light ON nahi hoti
• Auto On/Off kaam nahi karta

✔ Fix:

• Controller wires re-tight karo
• Controller reset karo (if button available)
• Faulty controller ko replace karein
  • Price: 300–1500 Rs (model on basis)

⭐ 5. Wiring Loose or Corroded

Open environment mein wiring easily damage hoti hai.

✔ Symptoms:

• Light kabhi ON hoti, kabhi nahi
• Light flicker karti hai
• Battery se panel connection weak

✔ Fix:

• All joints tighten karo
• Heat-shrink tube ya insulation tape use karo
• Rodents (rats) wiring cut kar dete hain—check properly

⭐ 6. PIR Motion Sensor Not Working

Agar sensor based street light hai aur motion detect nahi karta, light kaam nahi karegi.

✔ Symptoms:

• Only dim mode mein rehti hai
• Motion detect nahi hota
• Light totally off

✔ Fix:

• Sensor clean karo (dust remove)
• Sensor angle adjust karo
• Sensor wiring check karo

⭐ 7. Auto ON/OFF (Dusk to Dawn Sensor) Issue

LDR sensor light ko automatically chalu karta hai.

✔ Fix:

• Sensor par mitti ya paint jam gaya ho sakta hai
• Sunlight facing direction check karein
• LDR sensor replace (cost: 80–200 Rs)

⭐ 8. Internal Fuse Blown

Kaafi models mein internal fuse hota hai jo surge se blow ho jata hai.

✔ Fix:

• Fuse replace karo
• Overload aur short circuits avoid karein

⭐ Quick Troubleshooting Summary Table

⭐ Preventive Maintenance Tips

• Har 15 din mein panel clean karein
• Wiring ko waterproofing den
• Battery ko annually test karein
• Street light ke aas-paas unwanted shade remove karein

⭐ Frequently Asked Questions (FAQ)

Q1. Solar street light raat bhar kyun nahi chalti?

Mostly battery weak hoti hai ya panel proper charge nahi deta.

Q2. Solar street light ki battery kitne saal chalti hai?

• LiFePO4: 5–7 years
• Lead Acid: 2–4 years

Q3. Light blink kyu karti hai?

Driver circuit issue ya LED board fault.

Q4. Panel clean karne ka best tarika kya hai?

Microfiber cloth + plain water (no chemicals).

Q5. Solar street light mein controller ka kya kaam hai?

Battery charging aur LED timing control karta hai.