When it comes to condenser covers, I always tell a customer not to waste their money.
The one pictured above is an example of a typical “tarp style” cover. I really don’t like these for multiple reasons. The first is that these covers don’t allow the unit to breathe. This means that condensation can build up on components and cause oxidation and premature wear. The next reason I don’t like these covers is that they give a rodent a nice, cozy place to move into for the winter by blocking the wind and snow. While they are in there, they will chew up all your wiring and could cost you a lot of money. If the snow and cold wind can circulate through the unit, a rodent might be more likely to pass the condenser up for a warmer place somewhere else. If you are hard-pressed on getting a cover, one like this one pictured below is all that I would recommend. Condensers are designed to be outdoors in the elements and a little snow won’t hurt them.