On our forever home, I want to install solar panels and a redundant AC system, or maybe just a backup AC system in a single room. We’re in the US PNW. Here, heat waves are becoming more and more a threat to human life. Where we’re at, we can get rare heat waves that go up to 112F, and that’s in an area where historically AC wasn’t common. It’s only in the last decade or two that it’s started to be viewed as a necessity. But thankfully when we get more of a dry heat, and the highest temp days are win the Sun is shining brightly. So I would like to have a setup where our home was essentially equipped as a lethal heat wave survival shelter, where we would be fine even if the grid fails. And part of that would likely just be keeping a duplicate AC, maybe just for a single room to shelter in, in the event of a lethal heatwave.