I could go into the long boring details, but I would simply recommend, very stongly, to avoid those. The term "solar generator" is just a gimick phrase. They are simply a low amp hour lithium battery with a built in AC charger and inverter.. at excessively high price tag to boot.
They are playing with the math to the extreme in their solar recharging times and would require additional panels (in the first kit.. 2 additional for 3 total) to even "theoretically" produce what they are claiming. Even then, the "math" might say it's possible in 10-21hrs, however, solar panels don't typically produce at the max rated level and there are not that many hours of the day suitable for solar production. So... what they really mean is, 2-4days if not in use. For one example....
