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Solar :garden light

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leoneil

New Member
Hi, guys i am building a solar garden light, with LED of around 1 or 2 watt,
wat kind of rechargeable batteries can i use , if i want a backup of around 8-10 hrs..

thanks in advance.
 

kpatz

New Member
What's the voltage and current rating of the LED you're using?

The voltage will determine how many cells you need, and the current times the backup time will determine the Ah/mAh rating of the battery.

So, for example, if you are using a 4 volt LED that draws 300 mA, using 1.2V NiMH cells you would need 3.33 cells (make it 4) and to get 10 hours you'd need a 3000 mAh capacity. (C sized cells).

Seems like a lot for a solar garden light... most solar garden accent lights are a fraction of the wattage, usually 1-2 miniature white LEDs that draw 1/10th the power. The solar panel is going to have to be several inches square to produce enough power to charge the batteries.
 
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Hero999

Banned
How big do you want it to be?

As mentioned above, a solar panel capable of recharging the batteries it going to be quite large.
 
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