Are there any concerns with using the solar panel included with the new 150x100x45mm enclosure and the RAK19007? The solar panel puts out around 6V in full sun and the datasheet for the RAK19007 says the following:
“The output voltage of the solar panel must not exceed 5.5 V. Otherwise, it may cause permanent damage to the board.”
You are good to use it. There is a Zener diode on the base board to limit the voltage. The 5.5V in the documentation is just an “over-protective” limit.
But it should be not more than 7V or the Zener diode might get to its limits.