I have installed this solar module and wanted to use it for Arlo Ultra. I get the message that it is not compatible, even though the cable connection fits. So now I have to assume that only Go 2 is compatible. My camera hardware is H6 according to the device info.

The solar charger has a cable with a magnetic head that fits the corresponding connector on the camera. In my case it is an Ultra model, but when I look at the pictures of the Go 2, the connection at the bottom of the camera is identical to the Ultra and the cable should therefore fit.