The ornamental design for a meterpanel, as shown and described.
FIG. 1 is a front view of a meter panel showing my new design;
FIG. 2 is a right side view thereof;
FIG. 3 is a top plan view thereof; and,
FIG. 4 is a partial enlarged view of FIG. 1.
The broken lines indicate the unclaimed portions of the meter panel and form no part of the claimed design. The dot-dashed line means a boundary between the claimed portion and the non-claimed portion.