This is just a concept I was thinking about. I have an arduino project with some dc motors that needs to run outdoors for a long time. The DC motors themselves do not need to run all the time, usually a 2-3 minute burst and at most for 30 mins at a time. They are 12v motors, drawing 0.4A at peak. I expect the overall circuit to draw around 2A during load.
I was looking at these solar battery packs, meant for charging phones with 5v output (has 3000mAh battery). I was wondering if I use a DC/DC booster and boost it to 12v to drive the motors, is it going to work well? I expect the battery will just drain faster, but since the motors are not used all the time, the solar panels can top up the battery when the system is resting for rest of the day.
DC/DC step up regulator: http://www.robotshop.com/ca/productinfo.aspx?pc=RB-Dfr-121&lang=en-US