diff --git a/homeassistant/components/enphase_envoy/config_flow.py b/homeassistant/components/enphase_envoy/config_flow.py
index 344431c6ee6..8c1c0983417 100644
--- a/homeassistant/components/enphase_envoy/config_flow.py
+++ b/homeassistant/components/enphase_envoy/config_flow.py
@@ -4,7 +4,6 @@ from __future__ import annotations
 
 from collections.abc import Mapping
 import logging
-from types import MappingProxyType
 from typing import TYPE_CHECKING, Any
 
 from awesomeversion import AwesomeVersion
@@ -58,7 +57,6 @@ class EnphaseConfigFlow(ConfigFlow, domain=DOMAIN):
     VERSION = 1
 
     _reauth_entry: ConfigEntry
-    _reconnect_entry: ConfigEntry
 
     def __init__(self) -> None:
         """Initialize an envoy flow."""
@@ -238,24 +236,20 @@ class EnphaseConfigFlow(ConfigFlow, domain=DOMAIN):
         self, user_input: dict[str, Any] | None = None
     ) -> ConfigFlowResult:
         """Add reconfigure step to allow to manually reconfigure a config entry."""
-        self._reconnect_entry = self._get_reconfigure_entry()
         return await self.async_step_reconfigure_confirm()
 
     async def async_step_reconfigure_confirm(
         self, user_input: dict[str, Any] | None = None
     ) -> ConfigFlowResult:
         """Add reconfigure step to allow to manually reconfigure a config entry."""
+        reconfigure_entry = self._get_reconfigure_entry()
         errors: dict[str, str] = {}
         description_placeholders: dict[str, str] = {}
-        suggested_values: dict[str, Any] | MappingProxyType[str, Any] = (
-            user_input or self._reconnect_entry.data
-        )
-
-        host: Any = suggested_values.get(CONF_HOST)
-        username: Any = suggested_values.get(CONF_USERNAME)
-        password: Any = suggested_values.get(CONF_PASSWORD)
 
         if user_input is not None:
+            host: str = user_input[CONF_HOST]
+            username: str = user_input[CONF_USERNAME]
+            password: str = user_input[CONF_PASSWORD]
             try:
                 envoy = await validate_input(
                     self.hass,
@@ -273,29 +267,23 @@ class EnphaseConfigFlow(ConfigFlow, domain=DOMAIN):
                 _LOGGER.exception("Unexpected exception")
                 errors["base"] = "unknown"
             else:
-                if self.unique_id != envoy.serial_number:
-                    errors["base"] = "unexpected_envoy"
-                    description_placeholders = {
-                        "reason": f"target: {self.unique_id}, actual: {envoy.serial_number}"
-                    }
-                else:
-                    # If envoy exists in configuration update fields and exit
-                    self._abort_if_unique_id_configured(
-                        {
-                            CONF_HOST: host,
-                            CONF_USERNAME: username,
-                            CONF_PASSWORD: password,
-                        },
-                        error="reconfigure_successful",
-                    )
-        if not self.unique_id:
-            await self.async_set_unique_id(self._reconnect_entry.unique_id)
+                await self.async_set_unique_id(envoy.serial_number)
+                self._abort_if_unique_id_mismatch()
+                return self.async_update_reload_and_abort(
+                    reconfigure_entry,
+                    data_updates={
+                        CONF_HOST: host,
+                        CONF_USERNAME: username,
+                        CONF_PASSWORD: password,
+                    },
+                )
 
         self.context["title_placeholders"] = {
-            CONF_SERIAL: self.unique_id or "-",
-            CONF_HOST: host,
+            CONF_SERIAL: reconfigure_entry.unique_id or "-",
+            CONF_HOST: reconfigure_entry.data[CONF_HOST],
         }
 
+        suggested_values: Mapping[str, Any] = user_input or reconfigure_entry.data
         return self.async_show_form(
             step_id="reconfigure_confirm",
             data_schema=self.add_suggested_values_to_schema(
diff --git a/homeassistant/components/enphase_envoy/strings.json b/homeassistant/components/enphase_envoy/strings.json
index e848b68e39d..d8511c58664 100644
--- a/homeassistant/components/enphase_envoy/strings.json
+++ b/homeassistant/components/enphase_envoy/strings.json
@@ -28,12 +28,12 @@
     "error": {
       "cannot_connect": "Cannot connect: {reason}",
       "invalid_auth": "Invalid authentication: {reason}",
-      "unexpected_envoy": "Unexpected Envoy: {reason}",
       "unknown": "[%key:common::config_flow::error::unknown%]"
     },
     "abort": {
       "already_configured": "[%key:common::config_flow::abort::already_configured_device%]",
-      "reauth_successful": "[%key:common::config_flow::abort::reauth_successful%]"
+      "reauth_successful": "[%key:common::config_flow::abort::reauth_successful%]",
+      "unique_id_mismatch": "The serial number of the device does not match the previous serial number"
     }
   },
   "options": {
diff --git a/tests/components/enphase_envoy/test_config_flow.py b/tests/components/enphase_envoy/test_config_flow.py
index ee10e9462f3..37dab559bb1 100644
--- a/tests/components/enphase_envoy/test_config_flow.py
+++ b/tests/components/enphase_envoy/test_config_flow.py
@@ -790,34 +790,14 @@ async def test_reconfigure_otherenvoy(
         },
     )
 
-    assert result["type"] is FlowResultType.FORM
-    assert result["errors"] == {"base": "unexpected_envoy"}
+    assert result["type"] is FlowResultType.ABORT
+    assert result["reason"] == "unique_id_mismatch"
 
     # entry should still be original entry
     assert config_entry.data[CONF_HOST] == "1.1.1.1"
     assert config_entry.data[CONF_USERNAME] == "test-username"
     assert config_entry.data[CONF_PASSWORD] == "test-password"
 
-    # set serial back to original to finsich flow
-    mock_envoy.serial_number = "1234"
-
-    result = await hass.config_entries.flow.async_configure(
-        result["flow_id"],
-        {
-            CONF_HOST: "1.1.1.1",
-            CONF_USERNAME: "test-username",
-            CONF_PASSWORD: "new-password",
-        },
-    )
-
-    assert result["type"] is FlowResultType.ABORT
-    assert result["reason"] == "reconfigure_successful"
-
-    # updated original entry
-    assert config_entry.data[CONF_HOST] == "1.1.1.1"
-    assert config_entry.data[CONF_USERNAME] == "test-username"
-    assert config_entry.data[CONF_PASSWORD] == "new-password"
-
 
 @pytest.mark.parametrize(
     ("exception", "error"),