SunJack – 60 Watt Foldable Solar Panel, ETFE Waterproof Portable Solar Panel with Kickstands, USB-C PD30W, USB-A QC3.0, DC Output, Solar Panels for Camping, Hiking, Emergency Power

Purchased the 40w version 7-8 months ago. It's heavy duty construction and design is worth the extra $$$ in my opinion. I wasn't going to write a review but then a week or so ago, it stopped working. Completely dead. I sent an email to Sunjack customer service and got a very fast reply. After a few diagnostic steps, he asked for my address and sent me a replacement. They stand behind their product. You can't say that for most of these companies today. Sunjack has my business from now on.

Works. Finally. I have had them all. I literally have 10 different solar chargers. At best 1 out of 4 solar chargers actually work. Most are simply scams or overrating their output so much its silly. I need them for work (expeditions - reality shows). This one works. It does not output 15w, but it does output about 5-6w and does not discharge your battery backwards in cloudy weather or shade. Yes. Backflow into the solar panels is a real thing.

I recently purchased the SunJack 40 Watt Folding Portable Solar Panel for a week-long camping trip, and it turned out to be a solid investment. Here’s what I found after using it on the go:Pros:1. Impressive Charging Power: For its size, this thing delivers serious power. On sunny days, I could fully charge my smartphone in under two hours, and it handled my tablet and small power bank without breaking a sweat. The 40 watts really do make a difference for larger or multiple devices.2. Compact and Portable: I love how it folds up. When folded, it’s about the size of a laptop, so it was easy to slip into my backpack. It’s a bit heavier than I expected, but not so much that it’s a hassle to carry around.3. Rugged Build: This panel feels like it was made for the outdoors. The outer material is durable and held up well to dirt, light rain, and being tossed around. It seems like it’ll last for quite a few more trips.4. When paired with a battery pack or solar generator, we had ample charge to power our electronics throughout the night until we could charge again the following day.Cons:1. Weight: While it’s not unbearable, it’s definitely not ultra-light either. For short trips, it’s fine, but if you’re an ultralight backpacker, you might find it a bit heavy for what it provides.2. Requires Direct Sun: Like most solar panels, this one needs strong sunlight to work at its best. Partly cloudy days still work but noticeably reduce charging speed. It struggles indoors or in shaded areas, so you’re out of luck in forests or overcast conditions.3. Efficiency: As with all solar panels, there is some wattage loss by the time it makes it to the device. In my limited testing so far, with direct sunlight and overall optimal conditions, I was seeing around a 33W input into my solar generator.Overall Impression:If you’re looking for a reliable, portable power solution for camping, emergencies, or outdoor work, the SunJack 40 Watt Folding Portable Solar Panel is a fantastic option. It’s powerful, durable, and convenient to carry if you don’t mind a bit of extra weight. Yes, it’s a bit of an investment, but the quality feels worth it. I’d highly recommend it to anyone who spends a lot of time off-grid!

For a portable panel, it's pretty large and heavy. But I don't think you can do better at 60watts. It seems well built and good quality (I've been using it about 3 months). I just want to set your expectations right from the beginning. It should fit in any normal sized bag but I have a laptop style backpack that is barely zips up in so just be aware. It's also heavier than you might expect. I also have the 25watt sunjack portable panel which is more what I would call "portable" 5 stars on weight and size.That being said I think it's great to have a decent amount of power able to fold up as small as it does and be as portable as it is. I'm happy with its portability, it's just not its best feature.I didn't like this panel when I first got it. I originally bought it because of the onboard electronics being able to deliver good amps at various voltages and I had hoped to power my macbook with it's USB-C connection. This works horribly. Due to USB-C being able to negotiate the voltage it wants to charge at it will pick a high voltage which gets very low amps and will be very unstable (it will constantly stop and start charging -- I'm not exactly sure what the cause is but I've seen the outcome. I think what happens is the macbook usb-c negotiates 20V but the panel outputs closer to 18.8V under load from what I've seen). The panel worked very bad under these circumstances. I even had trouble charging my USB-C Anker 737 at times. Power-cycling on USB-C. Terrible investment I thought. Then I discovered the best setup with this panel.The best way to use this panel is to get a DC5521 (5.5mm outer, 2.1mm inner plug size) to car cigarette lighter adapter and get a 12V max USB cigarette adapter (adding to the cost, yes, but something that's very useful with these lower voltage panels) and charge your USB-C devices from there. This way the cigarette adapter setup down-regulates to 12V max and your USB-C devices will charge with much more stability (you limit the voltage USB-C can negotiate to 12V instead of 20V). I use a USB adapter which outputs 12v at 2.25A so 25watt charging. Less than the onboard advertised 45watt but it actually works so there's that. You can also easily add a large extension to the setup. I have a 3m DC5521 male to female adapter with the DC5521 cigarette adapter plugged into that. From there I can use another 3m USB-C cable to my laptop and everything works great. In my case this means I can have the solar panel out in the sun and have my electronics fairly far away in the shade or even run the cable into my home and charge my laptop while using it at my desk. Very nice. The DC5521 port is a life saver on this panel.I wish they had perhaps better tested the real world usability of the onboard USB ports. Limiting them to 15V max would have been a better experience across more devices, I think. That being said, this is my daily panel and provides plenty of power to charge up my macbook m1 and all the other USB devices in my life. The DC5521 port makes this panel much more flexible compared to the 25watt model even though the 25watt model is more compatible and stable with all my USB devices out of the box.Thus ends my overly long but hopefully helpful review :)