diff --git a/esphome/components/remote_base/__init__.py b/esphome/components/remote_base/__init__.py
index 8d735ea56..d24d24b00 100644
--- a/esphome/components/remote_base/__init__.py
+++ b/esphome/components/remote_base/__init__.py
@@ -39,7 +39,7 @@ from esphome.const import (
     CONF_WAND_ID,
     CONF_ZERO,
 )
-from esphome.core import coroutine
+from esphome.core import ID, coroutine
 from esphome.schema_extractors import SCHEMA_EXTRACT, schema_extractor
 from esphome.util import Registry, SimpleRegistry
 
@@ -2104,7 +2104,9 @@ async def abbwelcome_action(var, config, args):
             )
             cg.add(var.set_data_template(template_))
         else:
-            cg.add(var.set_data_static(data_))
+            arr_id = ID(f"{var.base}_data", is_declaration=True, type=cg.uint8)
+            arr = cg.static_const_array(arr_id, cg.ArrayInitializer(*data_))
+            cg.add(var.set_data_static(arr, len(data_)))
 
 
 # Mirage
diff --git a/esphome/components/remote_base/abbwelcome_protocol.h b/esphome/components/remote_base/abbwelcome_protocol.h
index b258bd920..4b922eb2f 100644
--- a/esphome/components/remote_base/abbwelcome_protocol.h
+++ b/esphome/components/remote_base/abbwelcome_protocol.h
@@ -214,10 +214,13 @@ template<typename... Ts> class ABBWelcomeAction : public RemoteTransmitterAction
   TEMPLATABLE_VALUE(uint8_t, message_type)
   TEMPLATABLE_VALUE(uint8_t, message_id)
   TEMPLATABLE_VALUE(bool, auto_message_id)
-  void set_data_static(std::vector<uint8_t> data) { data_static_ = std::move(data); }
-  void set_data_template(std::function<std::vector<uint8_t>(Ts...)> func) {
-    this->data_func_ = func;
-    has_data_func_ = true;
+  void set_data_template(std::vector<uint8_t> (*func)(Ts...)) {
+    this->data_.func = func;
+    this->len_ = -1;  // Sentinel value indicates template mode
+  }
+  void set_data_static(const uint8_t *data, size_t len) {
+    this->data_.data = data;
+    this->len_ = len;  // Length >= 0 indicates static mode
   }
   void encode(RemoteTransmitData *dst, Ts... x) override {
     ABBWelcomeData data;
@@ -228,19 +231,25 @@ template<typename... Ts> class ABBWelcomeAction : public RemoteTransmitterAction
     data.set_message_type(this->message_type_.value(x...));
     data.set_message_id(this->message_id_.value(x...));
     data.auto_message_id = this->auto_message_id_.value(x...);
-    if (has_data_func_) {
-      data.set_data(this->data_func_(x...));
+    std::vector<uint8_t> data_vec;
+    if (this->len_ >= 0) {
+      // Static mode: copy from flash to vector
+      data_vec.assign(this->data_.data, this->data_.data + this->len_);
     } else {
-      data.set_data(this->data_static_);
+      // Template mode: call function
+      data_vec = this->data_.func(x...);
     }
+    data.set_data(data_vec);
     data.finalize();
     ABBWelcomeProtocol().encode(dst, data);
   }
 
  protected:
-  std::function<std::vector<uint8_t>(Ts...)> data_func_{};
-  std::vector<uint8_t> data_static_{};
-  bool has_data_func_{false};
+  ssize_t len_{-1};  // -1 = template mode, >=0 = static mode with length
+  union Data {
+    std::vector<uint8_t> (*func)(Ts...);  // Function pointer (stateless lambdas)
+    const uint8_t *data;                  // Pointer to static data in flash
+  } data_;
 };
 
 }  // namespace remote_base