Gadling Gear Review: Goal Zero Sherpa 50 Solar Charging Kit
At the heart of this kit is Goal Zero's excellent Nomad 13 solar panel, so named for its ability to generate up to 13 watts of power, and the Sherpa 50 Recharger pack. The two work in tandem to provide an excellent on-the-go charging system for just about any device you could possibly carry with you on your travels. Both are durable, compact and lightweight, so they won't take up too much room in your pack either. Together they tip the scales at just 2.7 pounds, which isn't much when you consider how useful this kit can be.
The Nomad 13 solar panel folds open to collect as much of the sun's rays as possible and can either directly charge a device from its built-in USB port or store energy in the Sherpa 50's internal battery, which is capable of holding up to 50 watt hours. Charging times depend greatly on the amount of available sunlight but one of the strengths of the panel is that it is capable of drawing power even on overcast days. In bright sunlight the Nomad 13 can fully charge the Sherpa 50 in as little as five hours, but in the real world, however, it only operates that quickly under the most optimal of conditions. It is more realistic to expect a seven to eight hour charge time under normal circumstances, and on cloudy days it could take as much as 12 hours or more. The Sherpa 50 can also be charged in as little as three hours via a wall outlet, which is convenient for having it ready to go before you ever leave home.
A fully charged Sherpa 50 is capable of recharging most smartphones seven to eight times and a tablet such as an iPad twice. It will even fully recharge a laptop via the AC inverter or a special 12V adapter one time before needing to be topped off by the sun once again. When plugged into the inverter, my MacBook Air charged quickly and efficiently and the Sherpa 50 still had a little juice left in the tank when it was done. I found that to be pretty impressive, as it meant I could still power up a couple of other devices before needing to recharge the Sherpa itself.
Goal Zero has created an efficient, easy to use solar charging kit that a lot of people are going to really like. Backpackers, campers, mountaineers, sailors and other outdoor adventurers will definitely want to add the Sherpa 50 kit to their mandatory gear list before heading out to explore the world. The system is perfect for keeping satellite phones, GPS devices, rechargeable headlamps, camera equipment and other items running even when you are hundreds of miles from the closest power source. And if you want to shed a little weight, both the Nomad 13 and the Sherpa 50 are perfectly capable of providing useful services on their own, although the battery pack could become dead weight without a way to keep it charged.
As much as I like this kit there are a few improvements I wouldn't mind seeing being made to future iterations. For instance, I was annoyed that the Sherpa 50 only had one USB port built in, as there are a lot of items that I carry with me that charge via USB and it would have been nice to charge two of them at a time. I got around this limitation by adding a USB 12V adapter to the mix, but that was just another small item that I needed to keep track of while on the road. Additionally, the USB port that is built into the Nomad 13 solar panel only puts out 1 amp of power, which is fine for many devices but isn't enough for an iPad or even an iPhone 5. It would be nice if you could simply plug those devices directly into the solar panel itself, but they just won't charge directly, even if the Nomad is in bright sunlight. The problem isn't with the panel but the low powered USB port, so hopefully future models will be able to correct this issue.
The other element of the kit that I would like to see improved is more design related. While its weight is only 2.7 pounds, that can still be a significant amount to add to your pack when you're wanting to travel light. Hopefully future versions of the Sherpa 50 kit can find ways to reduce the weight further, while still managing to keep performance high. This is less of a criticism than it is wishful thinking though, as it wasn't all that long ago that we would have thought it impossible to have this kind of solar charging option in such a compact package.
As someone who has really come to appreciate having good travel gadgets with rechargeable batteries, I find the Sherpa 50 to be an amazing product. It works well, is simple to set up and it delivers on Goal Zero's promise of free energy from the sun. I liked this kit so much, in fact, that when I had to return the review unit after I was finished testing it I immediately went shopping for one for myself. I don't want to get caught without one the next time I head out on a big adventure, as I think it is going to make life much easier.
[Photo Credits: Goal Zero]