Ductless minisplit, Heat Pump Question.

[jeff47]

4. Heat pumps "pump" heat from one location to another.

So when it heats your house, it cools the outside. When it cools your house, it heats the outside.

Wind helps because it replaces the cooled outside air with warmer air. It's the same job the fan on the outside unit does, but wind moves a lot more air.

If the difference in performance is quite large, you may want to confirm that the fan on the outside unit is working, and that you aren't getting ice forming on the unit.