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
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
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.