https://www.respshop.com/blog/2013/03/0 ... p-machine/
Recently I was contacted by an adventurer, who posed a very interesting question. How can I use my CPAP while on a 500 mile walking and hiking pilgrimage? I instantly thought of a battery pack, which is very common nowadays. He already had that in mind, but his worry was more of how to charge the battery pack. He was heading to Brazil and wasn’t sure if he would have access to electricity every day, in order to recharge the battery. Diving deeper into this matter we started talking about the Transcend II Travel CPAP Machine, which remarkably has a Solar Charger available. How could he use this while hiking and trekking on his journey?
Upon further investigation, we located the specs of this Solar Charger for the Transcend II Travel CPAP Machine. The dimensions while rolled and folded are 10.5 in. x 3.5 in. x 2 in. (267 mm x 89 mm x 51 mm) making it very portable and will fit in most bags. The weight is merely 1 lb. (.45 kg), so with the Transcend II Travel CPAP Machine @ .94 lbs. and the Overnight battery @ .6 lbs., we have a total of 2.54 lbs. of added weight to his pack. The Overnight Battery will give him 7-9 hours of operating time @ 14 cm H2O. He clarified that this was acceptable in size, weight and length of operation for his travels but still pondered how to charge the battery during the day while he was hiking. We found the unfolded dimensions to be 30 in. x 21 in. (762 mm x 533 mm). Next we discussed if this Solar Charger could be applied to his back, unfolded to charge while he was hiking.