That seems silly to have a device to be in a hostile and unpredictable location and not put some type of preventative measures in place to keep its power sources protected. While I can understand that may not have been in the scope of the project, it is usually, in my opinion, a topic that transcends scope perimeters (if that is how you spell that lol) when it comes to project safety and life continuance of said projects.

Does it not move anymore? Couldn't they just ask it to turn its plates sideways or to tilt sideways and hope the sand falls off, even slightly to get more sunlight to power it back up, even if it takes a while to do, it would continue the mission if it worked or when another mars wind blows through