Thought I would share a positive experience with a few gadgets: I am planning our first overnight on S/V MaryAnn and electrical is not in the cards this season. No worries as nav lights will not be required but we would like some juice for cell phone charging and ambient light. Not sure I will ever need a full solar panel installation, but this little bad boy from Goal Zero is really impressive. (no skin in the game, just saw it at REI and gave it a swing) Ruggedized panel folds in two (magnetic clasps) and is about the size of an 8 1/2 x 11 inch piece of paper when closed. Open you see below and it directly charges the venture 30 storage bank -- (3.7V, 7800mAh) and has usb and micro usb outputs to charge whatever you need juice for. Pretty dang slick for a portable rig that can go from boat to car to campsite and back.