These work well. No power needed.

If you don't have an outdoor kitchen for that fish, bro, you're way behind the 8 ball ..

Always look for passive cooling using convection. If you install solar, remember the panels act like a tropical roof and shade the house, while you use the power for aircon

I have a brushless 6-inch inline fan that pulls air through the space between my insulated ceiling and metal roof and exhausts it outside. It has a temperature sensor, so it starts automatically at a set temperature.

I did a full ridge and soffit vent system calculated to the US IBC… though I had to order the ridge vents myself, since the local roofers in both Pangasinan and Dinagat had never used them. For airflow inside, I just put oversized ceiling fans in every room and big American-style windows… not the Philippine sliding-screen kind that doesn't even keep out lizards