[taneq]

Depends on the speed at which you reel it in but I can't see it being hugely significant. You would, however, recoup that energy when reeling the kite out again if the winch has regenerative braking (assuming the wind speed is constant).

If the wind speed isn't constant then you could save power by only reeling the kite in when the wind slacks off. If you felt especially proactive you could generate power by reeling it out during gusts then back in during lulls.