In a blender or food processor, combine the diced peaches, honey, apple cider vinegar, chipotle peppers, olive oil, garlic powder, onion powder, smoked paprika, salt, and black pepper. Blend until smooth to create the marinade.
Place the chicken thighs in a large resealable plastic bag or a shallow dish. Pour the marinade over the chicken, ensuring all pieces are well coated. Seal the bag or cover the dish and refrigerate for at least 1 hour, or up to 8 hours for more flavor.
Preheat your grill to medium-high heat.
Remove the chicken from the marinade, allowing any excess to drip off. Discard the remaining marinade.
Grill the chicken thighs for about 6-8 minutes per side, or until the internal temperature reaches 165°F and the chicken is nicely charred.
Remove the chicken from the grill and let it rest for 5 minutes before slicing. Serve warm.