Whisk all marinade ingredients; toss chicken with 1 tsp kosher salt; marinate 2 hr (or refrigerate up to 24 hr).
Preheat grill to medium‑high indirect; oil grate.
Grill skin‑side down over direct heat 5–10 min; flip once.
Move to indirect heat; grill until 165°F, 20–25 min; rest 10 min.
Top with banana peppers and cilantro; serve with lime wedges.