The ornamental design for a solar golfcupcover, as shown and described.
FIG. 1 is a top perspective view of a solar golf cup cover showing my new design;
FIG. 2 is a top view in plan thereof;
FIG. 3 is a bottom view in plan thereof;
FIG. 4 is a front view in elevation thereof;
FIG. 5 is a right side elevation view thereof;
FIG. 6 is a right side view in elevation thereof; and,
FIG. 7 is; a left side elevation view thereof.
The broken lines showing a solar collector, light emitting diodes, screws, lettering and buttons are included for the purpose of illustrating unclaimed subject matter and forms no part of the claimed design.