Step 1: The Goal
I wanted a universal power supply that would come in handy while away from any form of power. I complicated this quite a bit a first but have now posted what I had done when I opened it up to make some changes to the unit.
This unit provides 12v from 3 x7ah batteries and that is used to run the led lighting that we use around the camp site and charge our cell phones and iPads. I installed a 150w inverter into the box too making it more versatile and because I had a little inverter lying around