diff --git a/esphome/core/helpers.h b/esphome/core/helpers.h
index b94826629f..c0e73b70e0 100644
--- a/esphome/core/helpers.h
+++ b/esphome/core/helpers.h
@@ -208,9 +208,30 @@ template<typename T> class FixedVector {
 
   ~FixedVector() { cleanup_(); }
 
-  // Disable copy operations (avoid accidental expensive copies)
-  FixedVector(const FixedVector &) = delete;
-  FixedVector &operator=(const FixedVector &) = delete;
+  // Copy constructor - performs deep copy
+  FixedVector(const FixedVector &other) {
+    if (other.size_ > 0) {
+      init(other.size_);
+      for (size_t i = 0; i < other.size_; i++) {
+        push_back(other.data_[i]);
+      }
+    }
+  }
+
+  // Copy assignment operator - performs deep copy
+  FixedVector &operator=(const FixedVector &other) {
+    if (this != &other) {
+      cleanup_();
+      reset_();
+      if (other.size_ > 0) {
+        init(other.size_);
+        for (size_t i = 0; i < other.size_; i++) {
+          push_back(other.data_[i]);
+        }
+      }
+    }
+    return *this;
+  }
 
   // Enable move semantics (allows use in move-only containers like std::vector)
   FixedVector(FixedVector &&other) noexcept : data_(other.data_), size_(other.size_), capacity_(other.capacity_) {