PV Gap

Marcus Said:

i have a solar panel of power =70w , battery=12v?

We Answered:

Look at the peak ratings of the panel. Power in Watts is simply Volts multiplied by Amps So divide your Watts by your Volts to get Amps.

In your case a 7Amp controller will be nominal if the peak rating is higher. A 15 amp controller gives you a margin of safety.

If you plan on learning more about electronics so you can eventually start building some of your own parts, you might take a look at the early stages of my blog.

http://altenciruits.wordpress.com

Floyd Said:

What size solar panel would I need to run a 12v computer fan? I want to use it as a small personal fan.?

We Answered:

A 1 Watt 12 volt panel is more than adequate for a single computer fan.