The ornamental design for a solar keyboardpowerstrip, as shown and described.
FIG. 1 is a top plan view of a solar keyboard power strip showing a first embodiment of our new design;
FIG. 2 is a top plan view of a solar keyboard power strip showing a second embodiment thereof; and,
FIG. 3 is a top plan view of a solar keyboard power strip showing a third embodiment thereof.
The broken lines shown represent unclaimed subject matter only and form no part of the claim. Where broken lines abut a claimed surface it is understood that those broken lines represent an unclaimed boundary between claimed and unclaimed surfaces. None of the broken lines form any part of the claimed design.