I could install a heat pump which can be run in reverse and cool the house. That would probably be cheap enough to install and use generated energy mostly. But

I could install a heat pump which can be run in reverse and cool the house. That would probably be cheap enough to install and use generated energy mostly. But a heat pump has an internal and external part. The internal part needs to be where it cools and it's ugly too look at. There are Aircon devices where everything is hidden away but they are expensive.