40W Portable Solar Panel Charger with Dual USB (5V/4A Overall) & DC (18V1.6A), IPX4 Waterproof Solar Charger for Camping, Compatible with iPhone 14/13/12/11/Xs,iPad,Samsung Galaxy

SKU: GW31.0040

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Take a power bank and charge that with the panel and then charge your GoPro. Faster and less expensive if anything goes wrong. 
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So long as it has a usb port there is no reason you could not. That being said, I have never directly powered any device from mine. I use it to charge my power banks and then use those to power other devices. Loss of a power bank because of spiked or fluctuating power (in and out of shadows, fast moving and intermittent cloud cover) may cause damage to devices that are directly connected. But, a power bank is a heck of a lot cheaper to replace. 
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Hi, Yes, this 14w solar charger can charge your iPhone 12, but it can't support fast charging Best regards 
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Hi, No, it can't charge the macbook pro Best regards 
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No faster or slower than any other solar charger at similar voltage & watts. A standalone battery should be used with this panel, not directly charging devices. It will continue to charge if shaded, & after 3 solid months of desert use, mine cracked by one of the snaps but still continues to work just fine. 
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Hi, Thanks for your reply Yes, this 14w can automatically restart charging after cloud cover 
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These are probably inverted by accident. 
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This depends on the amount of solar energy available (sunny day or cloudy), and whether the power bank support charging itself and connected devices (not all power banks can, but you can check by connecting to the mains outlet). 
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Question for the manufacturer. Thin film solar panels are made by other manufacturers. This is the kind of solar panel the average person could afford. Check out "Allpower 100-watt portable, folding solar panel" for backpacking with power bank.