"A cheap, complete solar kit for charging phones, not for powering a campsite."
The '146Wh Solar Power Bank' spec means it can power a 50-watt device, like a laptop, for just under three hours, or a 10-watt phone for about 14 hours, assuming perfect efficiency.
This is for someone who needs an inexpensive, all-in-one kit for keeping small electronics like phones and drones topped up during a weekend trip or a brief power outage. The value is strictly in the low entry price for a battery and panel together, accepting the very low power output.
Anyone needing to power devices over 100W or requiring modern fast-charging like USB-C Power Delivery for laptops should look elsewhere. If you plan to use a power station regularly, a unit with a specified LiFePO4 battery will offer a vastly longer service life for a higher initial cost.