device to charge electronic equipment from renewable energy sources

Hello, I am looking to connect with a person that can help me connect my ideas for charging my mobile devices, the succesful applicant will be able to help me create a working prototype with a view to manufacturing these devices for sale in the future. I spend a lot of time outdoors traveling and camping and am required to take several devices with me that require a charge. I have tried running an inverter from the main battery of the vehicle which is fine on long trips but isn't practical if i am stationary for several days at a camp site. the concept i am proposing is as follows.... in the dashboard of my car there is an empty console above the radio (wasted space) I wish to use this space to house a dc connector (cigarette style), two USB's, a battery isolator and a power level display (LEDs) To charge my mobile devices. As mentioned the car is more than capable of doing this as is while driving but if left stationary for several days the battery becomes drained. When the ignition is off I would like to be able to place solar cells to charge the battery. summary of requirements... * battery (54 WHr aka 10 iPhone charges) * 15 Watt Solar Panel (it's fully weatherproof & waterproof) * Power Adapter to connect to main car battery to charge while driving (anderson plug?) * LED Light with socket, cable and switch * USB Universal Battery Charger that allows you charge any 3.7-volt Lithium battery (for phones, cameras, etc). maximum dimentions= 17.7cm W / 4.2cm H / 11.5cm D If possible i would like to make this device removable/portable to take on hikes when not in the car. Thanks for checking out my project, I look forward to hearing about your experience with solar technologies and ways that you can help me make this project a reality.