Technical Support wrote:
Much of this will depend on how much ambient you want to let in. The short answer is, no, we do not have any light that will natively sync above the cameras x-sync speed (1/250-ish).
If you are not allowing much ambient in your exposure, our Einstein will work well to freeze motion, if it is the only source of light. If there is a great deal of ambient, then there will be blur from the ambient light.
If you are shooting kite surfers, I would presume it is from a distance. Distance and higher-than-x-sync speeds are going to mean a great deal of power.
Thank you, I purchased a 1200 watt strobe... If that does not do it.... I'll light a pack of matches! :) Thank you!