It will also help you greatly if your root pouches or pots are insulated. Shade cloth is great, but you really want to keep the roots cooler. Cloth pouches are great for aerating, but if the air going through is like that of a food dehydrator, then there isn't enough oxygen in it, anyway, and it's going to just dry out the pot, while raising the temp. Anything that you can put around the container that doesn't actually touch it, will help. Cardboard, straw bales, etc. I actually had some of my greatest grows in pots that I made from 55 gallon food grade poly drums. (that I cut in half) That material really resists heating quite well, and it shows a direct benefit.
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Peppers grow in some pretty harsh climates, so they don't necessarily need to be babied. It's just that container culture has its limitations.
Good luck with your labor of love.