SunJack – 40 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

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!

Feels very well built. Works great so far when tilted properly towards the sun. Good stand. A tad heavy. Survived rain so far. Folds good too. The fly in the ointment is the price. It's really too expensive compared to alternatives on the market.

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.

This a very well designed solar panel, SunJack pretty much thought of everything and packed it into a relatively compact panel. It has two kickstands, a pocket to store accessories, the USB ports are waterproof (mine still works after getting hit with rain), folds up to a compact size, includes adapter cables so it’s compatible with just about any device. In direct sun I was getting around 34 watts from the USB-C port, making it able to rapidly charge any PD30 enabled devices. One downside is it’s a little heavy due to its construction and included kickstands, pocket and accessories, but that’s a good trade off for me.

Solar panels never provide their rated capacity, especially over USB. This one is magic. It produces MORE. The USB-C port alone produces 33 watts. Using USB-C and USB-A together I got 43 watts from this 40 watt panel. That’s insane. The screenshot is after it got heated by the sun which reduced it to 40 watts…this panel is awesome.

The 21v output, round plugin on back of panel, cables and adapters won't stay plugged except under perfect conditions. The usb connectors are fine. I never checked the round one when I received it, it's made of plastic with a small tab for connector and center pin is too small. Junk

Haven't had a chance to use it yet but with recent power outage wanted something to charge small items. Like rechargeable flashlight. It's about 40 wat . Wish I had gotten a higher wattage but others made in China and some reviews weren't good.

Bought this for power outages and anytime our family goes camping. I really well made and easier to use than I was expecting. I’ve been able to charge phones, batteries and a tablet. Couldn’t be happier.

Very well made, heavily engineered to quality and durability Back pouch and accessories a valued addition This panel is hands down the most efficient well made panel on the market