solar power charging question

billybad

Newly Enlightened
Joined
Apr 23, 2006
Messages
45
I was wonder if anyone could give me info on how to make or where to buy a solar charger for a thour light and a illumnist hid we go camping alot and away from cars and elec so was tring to think of a way to do this ty
 

VidPro

Flashlight Enthusiast
Joined
Apr 7, 2004
Messages
5,441
Location
Lost In Space
something like this
http://cgi.ebay.com/ws/eBayISAPI.dl...MEWA:IT&viewitem=&item=250086285807&rd=1&rd=1

there are also "expedition" weight fold outs, but they are more money.

there used to be a 4 fold 10W pannel that was a bit cheper than this, but i dont see it available.

you need ABOUT 15W to recharge a 7A 12V gell cell type battery, without tracking the sun, you can get away with as little as 3W to just top it off, and get it charged in a week, and a 5W to get it charged in 2 days, and a 10W to keep it going, if you dont run it out totally.
WHY?
well 12W would be 1 amp, 1 amp for 8 hours would be a full charge for a 7A gell cell.

and i do gotta mention not overcharging Gell cells, they split, and even if they bubble internally a little, they become useless fast. and they dont like to be left discharged Either, dang pickey cell.
 
Last edited:

Sub_Umbra

Flashlight Enthusiast
Joined
Mar 6, 2004
Messages
4,748
Location
la bonne vie en Amérique
VidPro said:
...you need ABOUT 15W to recharge a 7A 12V gell cell type battery, without tracking the sun, you can get away with as little as 3W to just top it off, and get it charged in a week, and a 5W to get it charged in 2 days, and a 10W to keep it going, if you dont run it out totally...
That's handy. What latitude did you figure that out for?
 

VidPro

Flashlight Enthusiast
Joined
Apr 7, 2004
Messages
5,441
Location
Lost In Space
i didnt :) i just guessed . and i play with different batts and solar junk here.
they say, and i have discovered about 40% loss from not tracking.
EX: changing the angle a mere 20* on my pannels when the sun is going down , goes from 5 to 9 amps.

Because you can change one asmith (angle) manually for the seasons (or local), there is only one angle left that you cannot practically move all day long, without tracking.

so if your in canada , or during winter, just lean the thing into the sun, and you still lose the 40% from not tracking, but at least your aimed at it as best as you can, without constant monitoring..

in other words i was just guessing, and if you have no sun, you will have to adjust accordingly.
 
Last edited:
Top