How Useful Are Portable Solar Panels for Backpacking?

For those who prefer to keep their pack light, I’m curious how useful portable solar panels actually are on longer backpacking trips. Phones, GPS devices, cameras, and other small electronics can add up when you’re away from a power source for several days. I’ve been comparing lightweight and flexible solar panels recently and came across Callsun Solar Coupons while researching different portable options. Beyond the price, I’m more interested in practical performance—how much power can you realistically generate during a day of hiking, and are portable panels worth carrying compared with a larger power bank? For experienced backpackers, what setup has worked best for you? Do you prefer folding panels, flexible panels, or simply carrying a larger battery and recharging when possible?