Communication is key. I can't always speak to the voices in my head and expect others to listen
. Should have given all this info in the first post.
Country: Pakistan
Temperature ranges according to months with humidity (in Celsius)
April to July: Temperature starts around 30 degrees and quickly climbs to 40 degrees range by May. June and July it starts touching 45~49 and coming back. Humidity before the monsoon is around 50% to 75%.
July-September: Temperature stays between 35~45 degrees. When it is raining, it cools down, other times....Humidity is close to 100%, depending on the monsoon.
September to November: Temperature slowly comes back down to 25~29
November to January: Depending on winter severity, the temperature drops to about 3~5 degrees, day time is about 12~19 on different days. There is significant fog.
January to April: Around mid February we see a rise back to the 20's range and crossing the 30's range closer to April.
Night time temperature from May to September is only about 4~8 degrees cooler than the day.
Just to give you an idea of the ambient heat. By mid May usually, the cold water pipes stop giving cold water. Water tanks are usually located on the roof, pipes are exposed and on the outside of the house on the sides (that is how they construct stuff here, don't ask why) until they run in to the bathrooms, kitchen etc.
Monsoon season has the worst humidity, followed by winters and foggy nights. Climate is changing, so some times a season is long and other times it is very short.
There is lots of dust and sand in the air as well. Dust storms are frequent. Can't really go and build windows or holes. Could create vents and cover those to allow hot air to vent out on the roof structure. We have flat rooves here.
This roof is cramped in this picture, but the structure in the middle is where the access point is for the roof, with the windows on it. The other one is probably the water tank. Most Inverters and batteries will be found at that access point, including mine, on the inside. The main distribution box where all the ac circuit breakers is located at the ground floor usually, right underneath this roof access point. I am contemplating on getting that access point insulated better. Currently it is a single layer brick structure.
We use 220V ac here. Have a solar set up of about 5.5Kwh on a 5.2Kwh inverter. Aerox, Inverex. The name has changed here, but most of the inverters usually have a Chinese parent company supplying the world under different brands.
I want to add a 48V 280ah LifePo4 backup. 16S only for now.
I want to create as low tech solutions as possible because the higher tech you go, more chances are something will go wrong and parents will call at all hours to fix the issues.
I like nosy70's idea of using clay pots (easy to buy those here), fill them up with water and let them do their magic. Use a few 12V dc computer fans to move the air around. I was thinking of using a wooden box with a few insulation layers to keep the heat out. I question that sometimes because after 9 months, the heat is bound to creep in at some point? That is why I like peltiers but the condensation will be an issue. Even regular fridges in the houses have trouble running and keeping up with the heat and humidity. Another idea I was playing around was using cpu/gpu "water" cooling solution to keep the batteries cooler.
Hopefully this gives you guys a little idea of what I am trying to do, and why the high ambient temperature is a concern for me.