Sadly the 60v max solar input voltage is something that has been a pita with many power stations for way too long. You should be able to use a single one of those panels or get yourself a parallel adapter and connect the panels together like that as that will be under the 60v max of the Segway. You just wont get the full output of both panels because you will hit the current limit.
Not much I can say other than it's a technological marvel of the modern age. I love it so. In fact, I sympathize for those who'll never get to experience it.