When I use to live in florida it was either too hot or there was some problem with polination. I never grew
peppers in florida, I grew mostly mellons for family gatherings, so i'm not complety sure but when I saw wilting I tried to shade them with cardbord if it wasn't raining.
If it was polination it was usually the neighbor killing bees with insecticide, bees ofcourse are needed to polinate the
flowers, so I had to hand polinate my plants until I moved to another state. So try ways to cool things down or see if their might exsist any problems with pollination.