Here I am going to show you how to set up a solar panel, buck convertors and batteries to create a solar power solution that will keep your pi powered 24/7. A great idea for your personal server or timelapse projects. The solar panel is sufficiently powerful to provide power in cloudy conditions. In this case, I am using the Pi as a Lighttpd web server to host my website which contains a live feed from my IP camera and many interesting pictures.

http://shaundobbie.no-ip.biz For those of you who may be interested.

This instructable was not intended to be terribly detailed it only outlines the setup which works effectively.

Step 1: What You'll Need

You will need:

1 40w solar panel
1 22Ah lead acid battery http://www.ebay.co.uk/itm/190855719649?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
1 UBEC (this takes high voltages down to 5v for the Pi. I use Turnigy UBECs because they work very well. You can find these on Ebay or Hobbyking
1 Variable buck convertor to take in the solar panel voltage and output 13.8v http://www.ebay.co.uk/itm/130901684801?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649

Soldering iron

You can use a voltmeter module and keep it on the battery constantly or just check up on it with your multimeter. I have an extra 2 7Ah lead acid batteries in parallel with the 22 Ah one but that really isn't necessary. I just do it to keep them in good condition.
<p>Hey, this looks great - very industrious. How many days does your battery run when it's cold/wet and cloudy? Have you really got the panel indoors.. how many hours of sun does it get?</p>

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