Instructables

Solar Charger?


Hi everyone!

i want to build solar powered charger... i already build ups system using old computer system ups...
configuration : 650va ups with 12v 35ah  battery. The battery is deep cycle one and should be charged in 8 hrs of good sun light....

so how many solar cells i need to buy and describe the calculation? Best online shop to buy a cheap and best cells ?


Thanks in advance...

8 hours, to deliver shall we say 40ah, thats 5a/hour x 8. So you need a panel that can deliver 5A@14V. You're lucky to have the sun as a resource !

Steve
Here are a couple of options.

Buy this panel new for about $80.
http://www.amazon.com/10W-5A-Controller-Regulator-Charger/dp/B009XY61Z2

Or get the same panel used off ebay for $17
http://www.ebay.com/itm/10-Watt-Solar-Panel-10W-12V-5A-Solar-Controller-Regulator-Charger-/230763702394

It's rated for 10W 12V@5A but the output will vary from 10V to 17V.
+1
arshanmugam (author)  steveastrouk1 year ago
Thanks you.. i want to build my own solar panel... so if you know any seller to buy 6x6 ploy solar cells at cheap price tell me....
arshanmugam (author)  steveastrouk1 year ago
Thanks for the reply...