Thread Resurrection!
The Sherpa 50 has performed great paired with the Nomad 13.5 panels, though I have found that the stated solar charging times to be optimistic. I was able to run my laptop (an old MacBook Air) for 2-3 hours depending on what I was doing. I would leave the set up charging during the day while I spent the day working and so I always was able to work at night for an hour of two if needed without dipping into the laptops internal battery.
Well, my old Sherpa 50 bit the dust just before my summer field season in Asia this past June. Sadly I found this out about 3 days before I got on the plane. I was topping it off for the 12 flight, heard it pop and found it deformed. I called Goal Zero and described the problem. They replaced my old Sherpa 50 with the new version. Sadly it would not arrive before I left as they were on back order. Impressive customer service and I appreciate that they stand behind their products! Thanks Goal Zero!
I needed something, so I went out and got another Goal Zero product, the Guide 10. That thing rocks! I could only add about 30% to an iPad/set of AA batteries, but it kept my phone charged. Funny, I get better cell phone coverage in western China than I do in the western US. The new light wand is fantastic and the recharge times are fairly accurate. I love it. I no longer need to have a huge number of AA and AAA batteries to keep my GPS and headlamps running during a 6 week field season.
I got back to find my new Sherpa 50 waiting for me. I have only used it once during a family camping trip and I love how much smaller it is. I am very happy with Goal Zero products. For the size, I see it as a product worth considering. It may be more expensive than other set ups but I can't take bulky and heavy solar charging systems with me and these work very well for me in challenging climates.