Solar panels and wind turbines are the only ways that can help you have energy in your green shack. Wind turbines are ineffective when there is no wind, but green shacks are located in warm areas, so there is a lot of sunlight. Because of this, a much better option are solar panels. All of them have the same drawback. They can harvest energy when they are faced towards the sun. But the sun is moving so, solar panels aren’t always effective. Portable solar panels don’t have this problem. They can be moved in order to face the sun during the entire day.
• Aspectsolar EP-60 is one of the best portable solar panels. It has LED lights that will notify you when it can be adjusted for better efficiency. You can lay it flat or dropped up in order to maximize the efficiency. EP-60 has impressive wingspan and a very durable carrying case. The price is $350. It isn’t very cheap, but it is effective.
• Rothco 80005 Multifunctional Military Solar Panel Charger is the best option if you have devices that need energy. It should be exposed to the sunlight only 2-3 hours and it will be ready to fully recharge the battery on your device. The word military in the name means it is resistant and durable. Also, this portable solar panel is very cheap. It costs only $44.
• Goal Zero 12004 Nomad is a 20W portable solar panel. It is flexible and foldable, so it looks even more interesting. You will be able to recharge the battery on your smartphone, camera, GPS and even a laptop using a USB port. The price is just $168.