The ornamental design for a solarpanel, as shown and described.
FIG. 1 is a front elevational view of a solar panel showing our new design;
FIG. 2 is a rear elevational view thereof;
FIG. 3 is a left side elevational view thereof;
FIG. 4 is an enlarge view of area 4 of FIG. 3;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is an enlarge view of area 6 of FIG. 5;
FIG. 7 is a top plan view thereof;
FIG. 8 is an enlarge view of area 8 of FIG. 7;
FIG. 9 is a bottom plan view thereof; and,
FIG. 10 is an enlarge view of area 10 of FIG. 9.
The broken line shown in the drawing views represents unclaimed environmental only and forms no part of the claimed design. The dash-dot line represents the boundary of the claimed design.