The Nomad 5 is Goal Zero’s entry level solar panel + charger, which also has the benefit of being nice, light, and simple. The FLIP power bank has enough energy to recharge a phone and takes around 2-3 hours to recharge (in good conditions). It can also charge and discharge at the same time, meaning you can power your phone whilst charging the power bank. The Sherpa 100PD contains 100w power, hence lasts for a whole lot longer, and is the largest battery you can take on an aeroplane. It also has the ability to charge laptops, which is a huge benefit for those on longer trips.