Dehumidifier recommendations?

Long story short, I have a 64 gun safe that I have to keep in my garage due to no space in my closet or rooms. The only downside is, I live in south Florida where it’s consistently 94-98% humidity outside and my safe is out in those elements essentially. I’ve tried using the snap safe 110v rechargeable dehumidifier but I damn near have to plug it in every day lol and my hydrometer has never gone below 60% humidity in my safe. Any suggestions and what is a good humidity that my guns should be safe at?