Hi - I have a small solar panel (~6v) and a little rechargeable battery back (12v, 1,2Ah).
I'm new to solar things, I was just hoping to make something that'd allow a lightbulb or two to be used for a few hours every day.
I read that the solar panel voltage needs to be about 2 to 3v higher than the battery's voltage to ensure it will charge, and will not damage. I'm just wondering if I should buy a second one of these 6v panels to run in series or get a bigger one.
This is the panel here.
Corriente: 0 - 330mA
Voltaje en circuito abierto: 7v
Dimensiones: 136 x 110 x 3 mm
Material: Silicio policristalino
(sorry it's in spanish, but you get the idea)
It says 7v in open circuit - does that mean that two in series would give me 14v and make it a very suitable match for this 12v battery?
While I'm asking solar things, is this battery really a good choice for what I want (just some lighting, maybe a phone charger)? Would it be possible to build a little charging controller with it?
These are the items: