Solar powered backpack options? Answered
I would like to create a backpack/rucksack that can properly charge a modern cell phone with enough to spare or a MP3 player or small GPS.
Preferably something that works while riding a horse for week long adventure trips.
Standard solar cells are not just quite rigid and heavy but also relatively fragile.
Flexible panels seem to be the alternative but price and power levels mean going well above the size of a standard 12V/10W panel.
And even getting those standard 25 by 35cm on average fitted onto a modern backpack is no easy task.
Trying to do so and getting the full 10W out is next to impossible it seems.
The theoretical 1000Wh on a 10 hour, sunny day for such a panel would go don to a realistical 100Wh hours at best.
Nowhere near enough to fully charge a hungry phone with a 4000mAh or bigger battery.
At least not if you really need a quick chage and consider a realistic environment.
Means a 2 hour quick charge at home might take 5 hours or more when hiking or riding a horse through the bush.
A foldable or roll up panel when having a break or camp might be nice but not if it would mean carrying an extra solar panel.
The most logical conclusion would be to integrate solar cells into the clothing as well.
sadly technology is not that far yet :(
So, how could a solar powered backpack or similar be created that is not too big and still capable of providing at least 5-6W under not so perfect conditions?
And preferably with at least 10W no matter how it is placed into the direct sun with the panels.
How could it be made possible to utilise the sunlight if you are facing the sun with the backpack, well, on your back?
What types of solar cells in terms of technology and being available would be best suited for such a rough application?