[SOLVED] Solar System Calculation.

[m_zaeem002]

I've a 10 watt led light and want to operate it.
But in day light solar panel charge it and in night battery back up glow the led.
tell me wattage of solar .... charging time is of 4 hour approx and glowing led time is 8 hour.
and also battery wattage.
below a pic of led.

 

[jayanth.devarayanadurga]

What is the supply voltage of LED? P = VI, 10W = VI, I = 10W/V.

 

[tpetar]

I've a 10 watt led light and want to operate it.
But in day light solar panel charge it and in night battery back up glow the led.
tell me wattage of solar .... charging time is of 4 hour approx and glowing led time is 8 hour.
and also battery wattage.
below a pic of led.
View attachment 90548

I didnt catch what solar panel charge? On picture is just led module.

What battery, what device, what circuit?

Post specification for led module ?

 

[jayanth.devarayanadurga]

Battery pack is charged from Solar Panel during day and during night led runs from battery power. he needs to know what wattage Solar Panel he needs to use to charge the battery pack.

 

[tpetar]

Yes, but he didnt say nothing about battery (capacity, voltage), and we dont know anything about led module except power of 10W (voltage, current). Without led module specification this calculation cant be done.

Maybe led module works on 20V or maybe on 15V or 48V ....

Maybe he try to use Li-Ion battery on 3,7V or lead acid 6V or 12V ...

 

[m_zaeem002]

Led module is of 12 volt dc and 500 mA..... and i want to use lead acid battery.
want to know wattage of solar and battery.......???

 

[tpetar]

If LED module uses 500mA @ 12V then :

12V 4,5Ah can give you around working 8h.


But I think that your module have around 800mA of current. This give you 4-5h of light.

To recharge this battery, count on solar panel between 0,5A-1A of current. Sometimes you dont have all day bright Sun, and you need larger receiving solar panel area (power).

Best for lead acid long life is to recharge in 10h time, and keep battery far from higher temperatures.

Solar panel between 10W and 20W will be good for daily cycling. But this lots depends from your location on Earth.

Take Li-Ion 18650 batteries (in pack) in consideration as alternative for battery.


;-)

 

[m_zaeem002]

Thanx for ur reply ..........