How big are the panels? Stresses are higher in a cantilever (free-floating ends) than when both ends are supported. Stresses are much higher than if the panels are normally supported at multiple points along its length.
On top of that, the pole will amplify the boat's rolling motions, again leading to greater stresses. I'd be very wary of doing this unless the panels are very small, or the mounting hardware for the panels is considerably overengineered. Mounting them on a radar arch would work. But I'd be extremely cautious about mounting on a radar pole.