Here is my step by step Instructable on how I made my mini solar generator. I made this one because it will be more compact than lugging around my larger one which weighs around 27kg (60 pounds). This one will be less than 3kg so of course it won't power a mini refrigerator or start my car like it's big brother but it will charge a few mobile phones/tablets and run a small oscillating fan at the lake in the summer. I have 3 folding solar panels that I use to power my things while camping but i think a 45w will suffice for this little one.
Parts I used:
1x Hot glue gun case 2x Toggle switches 1x 7.2Ah Battery 2x 12v Power outlet 1x 3a Double USB Port 1x 5w LED light 1x 12v Battery Gauge 1x 45w folding solar panel 1x 220-240V 500mAh European Charger. 1x 12V Cigarette Lighter Plug.
* Various lengths of red and black wire. * Twist ties * Duct Tape
YouTube video showing my larger system with panels.
note: just added a 12 volt plug to the mini solar generator and now I can charge it up while driving around.