> unless I'm reading what Casio announced wrong. According to them, the watch will recharge enough with the solar panel quickly enough to use the fitness functions for 7 hours a week(1 hour a day).

You are reading it wrong. What it says is that if you use fitness one hour per day, you will have to manually charge it once a week

> a wired charger is also included. On a full charge, which takes around three hours, the watch will run for about a week when using the added fitness features for an hour a day.