Electrical – How to patch siding half covered by electrical panel

caulkingelectrical-panelexteriorsidingwaterproofing

When I had solar panels installed, they removed an old electrical box, leaving a hole in the siding. For no apparent reason, they installed the new electrical panel over half of the hole they left. I'm not sure how to fix this.
picture of electrical box covering half of hole in siding

It looks like I could cut a section of matching composite siding, screw that in and caulk around it with silicone on the exposed sides, but since half of the hole is behind the electrical panel, it looks like I'd also need to caulk the top and sides of the electrical panel to prevent water from dripping down into the opening. Is this the right approach for solving this problem?

Update:
Here are some additional photos.

zoomed out picture of panel

bottom area of panel

above panel

It doesn't appear that any wires go into the house from the back of the panel. If you look carefully, it looks like there's a gap in the siding that goes all the way to the soffit. I'm not sure what that's about. Would I need to caulk that as well?

Best Answer

That looks like T1-11 you should be able to clean the caulk out and install a new piece. I don’t like leaving voids because wood destroying insects may find a way in and make it home.

They probably put the panel there because it feeds the inside panel using the same opening.

Some lumber stores have partial sheets of T1-11. I would get a piece and match the pattern, if that is a seam just to the right I would cut that 1” piece out. Slip the new one in and caulk top and bottom. I would expect screws to be the best attachment method.

So clean out the caulk, remove the small strip, install new section and caulk the box and seams. Prime and paint to match.