Wholesale Portable Solar Power Generator for CPAP

Although this thing is a bit pricy, it's worth it. It's very compact, smaller than I thought it would be. It's about the size of a car battery. The digital display shows complete information about charging rate, discharging rate and the charge state of the battery. The internal battery stores a pretty good amount of power. (33Ah) I use a Remstar M series CPAP machine. I ran it all night last night (on DC and without the humidifier) and after 9 hours of used the Yeti's battery still hadn't dropped from the 100% mark to the 80% mark.

My guess is that the Yeti 400 would power the CPAP machine (on DC without humidifier) for over four days. There are several options for recharging the Yeti. The easiest is to plug it in to the AC adapter that comes with it and it will recharge from dead in about 5 hours. Never let your Yeti's battery go dead though and try not to let it go below 60% charge unless it's an emergency because that is tough on the battery. But what if you have no AC power to charge it with? Well you can charge it by solar power. This unit does not come with a solar panel.

UFO ENERGY has several solar panels available however. If I were going to buy one I would consider the Boulder 90. The Boulder 90 looks like a great panel but it is $449 for a 90W panel. That is on the expensive side. On the plus side, it is pretty much plug and play. No wiring or electrical knowledge necessary. If on the other hand you are a little knowledgeable about electricity, and you want to save some money, you might want to look for another brand of polycrystalline or monocrystalline solar panel in the 60 to 120 Watt range. Do not exceed 120 Watts and look for a panel that has an open circuit voltage (OCV) somewhere around 22V. I would not go above 24V even though the Yeti specs say it can handle all the way up to 29V. Such a panel can be had for less than $200. Wire an 8mm charging plug (Actually 7.9mm OD, 5.5mm ID) to the panel (with the correct polarity) and you should be able to recharge your Yeti from the Sun.

But make sure you know what you are doing. If you wire another panel up incorrectly or use a panel with incorrect specifications, you will likely destroy your Yeti's charge circuit. The Yeti uses an AGM (Absorbed Glass Mat) battery. This is the best possible battery for this type of application. It is rugged and durable. But no battery lasts forever and UFO ENERGY did a great job in design and made this battery replaceable. When one day the battery in your Yeti no longer takes a charge, you don't have to throw the Yeti away, you can simply replace the battery.

I would not recommend buying this product. After using twice to charge a cel phone, the AC outlets stopped working and UFO ENERGY customer service tells me the internal fuse is bad. I contact Amazon and they offer to refund or replace for me. I take them up on the replacement. Unfortunately, the same thing happens with the replacement after a couple uses. This Yeti 400 should be able to handle a cel phone. I contact Amazon again and take them up on the refund. Very disappointing product that left me frustrated. Amazon was amazing throughout and I appreciate their professionalism in taking care of this.