Moma store is currently making available a solar-powered laptop bag that works best by basking under direct sunlight just like how reptiles do, charging up your notebook inside. I wouldn't leave your notebook in this bag on the dashboard while you're parked in the open deserts of Nevada though, since your notebook will probably fry under that heat albeit with a fully charged up battery at the end of the day. It also comes with the necessary adapters to function with cell phones and various electronic devices, with the additional option of being hooked up to a car charger whenever the sky gets too cloudy. The Moma laptop bag works with notebooks up to 17" in size and uses water resistant materials in its construction, retailing for $598.
Source: Laptoping