diff --git a/homeassistant/components/openevse/__init__.py b/homeassistant/components/openevse/__init__.py
index 01f4b89edfe..5afe1b4a12e 100644
--- a/homeassistant/components/openevse/__init__.py
+++ b/homeassistant/components/openevse/__init__.py
@@ -1,10 +1,11 @@
 """The OpenEVSE integration."""
 
 from openevsehttp.__main__ import OpenEVSE
+from openevsehttp.exceptions import AuthenticationError
 
 from homeassistant.const import CONF_HOST, CONF_PASSWORD, CONF_USERNAME, Platform
 from homeassistant.core import HomeAssistant
-from homeassistant.exceptions import ConfigEntryNotReady
+from homeassistant.exceptions import ConfigEntryAuthFailed, ConfigEntryNotReady
 from homeassistant.helpers.aiohttp_client import async_get_clientsession
 
 from .coordinator import OpenEVSEConfigEntry, OpenEVSEDataUpdateCoordinator
@@ -25,6 +26,8 @@ async def async_setup_entry(hass: HomeAssistant, entry: OpenEVSEConfigEntry) ->
         await charger.test_and_get()
     except TimeoutError as ex:
         raise ConfigEntryNotReady("Unable to connect to charger") from ex
+    except AuthenticationError as ex:
+        raise ConfigEntryAuthFailed("Invalid credentials for charger") from ex
 
     coordinator = OpenEVSEDataUpdateCoordinator(hass, entry, charger)
     await coordinator.async_config_entry_first_refresh()
diff --git a/homeassistant/components/openevse/config_flow.py b/homeassistant/components/openevse/config_flow.py
index 264b306654c..866501d8235 100644
--- a/homeassistant/components/openevse/config_flow.py
+++ b/homeassistant/components/openevse/config_flow.py
@@ -1,5 +1,6 @@
 """Config flow for OpenEVSE integration."""
 
+from collections.abc import Mapping
 from typing import Any
 
 from openevsehttp.__main__ import OpenEVSE
@@ -170,3 +171,38 @@ class OpenEVSEConfigFlow(ConfigFlow, domain=DOMAIN):
             data_schema=self.add_suggested_values_to_schema(AUTH_SCHEMA, user_input),
             errors=errors,
         )
+
+    async def async_step_reauth(
+        self, entry_data: Mapping[str, Any]
+    ) -> ConfigFlowResult:
+        """Handle reauthentication on an authentication error."""
+        return await self.async_step_reauth_confirm()
+
+    async def async_step_reauth_confirm(
+        self, user_input: dict[str, Any] | None = None
+    ) -> ConfigFlowResult:
+        """Confirm reauthentication."""
+        errors: dict[str, str] = {}
+        reauth_entry = self._get_reauth_entry()
+
+        if user_input is not None:
+            errors, _ = await self.check_status(
+                reauth_entry.data[CONF_HOST],
+                user_input[CONF_USERNAME],
+                user_input[CONF_PASSWORD],
+            )
+            if not errors:
+                return self.async_update_reload_and_abort(
+                    reauth_entry,
+                    data_updates={
+                        CONF_USERNAME: user_input[CONF_USERNAME],
+                        CONF_PASSWORD: user_input[CONF_PASSWORD],
+                    },
+                )
+
+        return self.async_show_form(
+            step_id="reauth_confirm",
+            data_schema=self.add_suggested_values_to_schema(AUTH_SCHEMA, user_input),
+            description_placeholders={CONF_HOST: reauth_entry.data[CONF_HOST]},
+            errors=errors,
+        )
diff --git a/homeassistant/components/openevse/coordinator.py b/homeassistant/components/openevse/coordinator.py
index d4852d63dbe..22d3a9bbeb1 100644
--- a/homeassistant/components/openevse/coordinator.py
+++ b/homeassistant/components/openevse/coordinator.py
@@ -4,9 +4,11 @@ from datetime import timedelta
 import logging
 
 from openevsehttp.__main__ import OpenEVSE
+from openevsehttp.exceptions import AuthenticationError
 
 from homeassistant.config_entries import ConfigEntry
 from homeassistant.core import HomeAssistant
+from homeassistant.exceptions import ConfigEntryAuthFailed
 from homeassistant.helpers.update_coordinator import DataUpdateCoordinator, UpdateFailed
 
 from .const import DOMAIN
@@ -63,3 +65,5 @@ class OpenEVSEDataUpdateCoordinator(DataUpdateCoordinator[None]):
             raise UpdateFailed(
                 f"Timeout communicating with charger: {error}"
             ) from error
+        except AuthenticationError as error:
+            raise ConfigEntryAuthFailed("Invalid credentials for charger") from error
diff --git a/homeassistant/components/openevse/strings.json b/homeassistant/components/openevse/strings.json
index 3a76b2bb27f..68bc31dbdc3 100644
--- a/homeassistant/components/openevse/strings.json
+++ b/homeassistant/components/openevse/strings.json
@@ -2,6 +2,7 @@
   "config": {
     "abort": {
       "already_configured": "This charger is already configured",
+      "reauth_successful": "[%key:common::config_flow::abort::reauth_successful%]",
       "unavailable_host": "Unable to connect to host"
     },
     "error": {
@@ -19,6 +20,17 @@
           "username": "The username to access your OpenEVSE charger"
         }
       },
+      "reauth_confirm": {
+        "data": {
+          "password": "[%key:common::config_flow::data::password%]",
+          "username": "[%key:common::config_flow::data::username%]"
+        },
+        "data_description": {
+          "password": "[%key:component::openevse::config::step::auth::data_description::password%]",
+          "username": "[%key:component::openevse::config::step::auth::data_description::username%]"
+        },
+        "description": "The credentials for your OpenEVSE charger at {host} are no longer valid. Please enter your current username and password."
+      },
       "user": {
         "data": {
           "host": "[%key:common::config_flow::data::host%]"
diff --git a/tests/components/openevse/test_config_flow.py b/tests/components/openevse/test_config_flow.py
index 64406f57356..9514daa75da 100644
--- a/tests/components/openevse/test_config_flow.py
+++ b/tests/components/openevse/test_config_flow.py
@@ -4,6 +4,7 @@ from ipaddress import ip_address
 from unittest.mock import AsyncMock, MagicMock
 
 from openevsehttp.exceptions import AuthenticationError, MissingSerial
+import pytest
 
 from homeassistant.components.openevse.const import DOMAIN
 from homeassistant.config_entries import SOURCE_IMPORT, SOURCE_USER, SOURCE_ZEROCONF
@@ -486,3 +487,80 @@ async def test_zeroconf_already_configured_host(
     # Should abort because the host matches an existing entry
     assert result["type"] is FlowResultType.ABORT
     assert result["reason"] == "already_configured"
+
+
+async def test_reauth_flow(
+    hass: HomeAssistant,
+    mock_charger: MagicMock,
+    mock_setup_entry: AsyncMock,
+    mock_config_entry: MockConfigEntry,
+) -> None:
+    """Test reauthentication flow."""
+    mock_config_entry.add_to_hass(hass)
+
+    result = await mock_config_entry.start_reauth_flow(hass)
+
+    assert result["type"] is FlowResultType.FORM
+    assert result["step_id"] == "reauth_confirm"
+    assert result["description_placeholders"][CONF_HOST] == "192.168.1.100"
+
+    result = await hass.config_entries.flow.async_configure(
+        result["flow_id"],
+        {CONF_USERNAME: "newuser", CONF_PASSWORD: "newpassword"},
+    )
+
+    assert result["type"] is FlowResultType.ABORT
+    assert result["reason"] == "reauth_successful"
+    assert mock_config_entry.data == {
+        CONF_HOST: "192.168.1.100",
+        CONF_USERNAME: "newuser",
+        CONF_PASSWORD: "newpassword",
+    }
+
+
+@pytest.mark.parametrize(
+    ("exception", "error_base"),
+    [
+        (AuthenticationError, "invalid_auth"),
+        (TimeoutError, "cannot_connect"),
+    ],
+)
+async def test_reauth_flow_errors(
+    hass: HomeAssistant,
+    mock_charger: MagicMock,
+    mock_setup_entry: AsyncMock,
+    mock_config_entry: MockConfigEntry,
+    exception: Exception,
+    error_base: str,
+) -> None:
+    """Test reauthentication flow recovers from errors."""
+    mock_config_entry.add_to_hass(hass)
+
+    result = await mock_config_entry.start_reauth_flow(hass)
+
+    assert result["type"] is FlowResultType.FORM
+    assert result["step_id"] == "reauth_confirm"
+
+    mock_charger.test_and_get.side_effect = exception
+    result = await hass.config_entries.flow.async_configure(
+        result["flow_id"],
+        {CONF_USERNAME: "newuser", CONF_PASSWORD: "wrongpassword"},
+    )
+
+    assert result["type"] is FlowResultType.FORM
+    assert result["step_id"] == "reauth_confirm"
+    assert result["errors"] == {"base": error_base}
+
+    mock_charger.test_and_get.side_effect = None
+    result = await hass.config_entries.flow.async_configure(
+        result["flow_id"],
+        {CONF_USERNAME: "newuser", CONF_PASSWORD: "newpassword"},
+    )
+
+    assert result["type"] is FlowResultType.ABORT
+    assert result["reason"] == "reauth_successful"
+    assert mock_config_entry.data == {
+        CONF_HOST: "192.168.1.100",
+        CONF_USERNAME: "newuser",
+        CONF_PASSWORD: "newpassword",
+    }
diff --git a/tests/components/openevse/test_init.py b/tests/components/openevse/test_init.py
index 5d99806abc0..a0326dbf598 100644
--- a/tests/components/openevse/test_init.py
+++ b/tests/components/openevse/test_init.py
@@ -2,7 +2,9 @@
 
 from unittest.mock import MagicMock
 
-from homeassistant.config_entries import ConfigEntryState
+from openevsehttp.exceptions import AuthenticationError
+
+from homeassistant.config_entries import SOURCE_REAUTH, ConfigEntryState
 from homeassistant.core import HomeAssistant
 
 from tests.common import MockConfigEntry
@@ -23,6 +25,49 @@ async def test_setup_entry_timeout(
     assert mock_config_entry.state is ConfigEntryState.SETUP_RETRY
 
 
+async def test_setup_entry_auth_error_starts_reauth(
+    hass: HomeAssistant,
+    mock_config_entry: MockConfigEntry,
+    mock_charger: MagicMock,
+) -> None:
+    """Test setup entry triggers reauth on authentication error."""
+    mock_charger.test_and_get.side_effect = AuthenticationError
+
+    mock_config_entry.add_to_hass(hass)
+    await hass.config_entries.async_setup(mock_config_entry.entry_id)
+    await hass.async_block_till_done()
+
+    assert mock_config_entry.state is ConfigEntryState.SETUP_ERROR
+
+    flows = hass.config_entries.flow.async_progress()
+    assert len(flows) == 1
+    assert flows[0]["context"]["source"] == SOURCE_REAUTH
+    assert flows[0]["context"]["entry_id"] == mock_config_entry.entry_id
+
+
+async def test_coordinator_update_auth_error_starts_reauth(
+    hass: HomeAssistant,
+    mock_config_entry: MockConfigEntry,
+    mock_charger: MagicMock,
+) -> None:
+    """Test coordinator update triggers reauth on authentication error."""
+    mock_config_entry.add_to_hass(hass)
+    await hass.config_entries.async_setup(mock_config_entry.entry_id)
+    await hass.async_block_till_done()
+
+    assert mock_config_entry.state is ConfigEntryState.LOADED
+
+    coordinator = mock_config_entry.runtime_data
+    mock_charger.update.side_effect = AuthenticationError
+    await coordinator.async_refresh()
+    await hass.async_block_till_done()
+
+    flows = hass.config_entries.flow.async_progress()
+    assert len(flows) == 1
+    assert flows[0]["context"]["source"] == SOURCE_REAUTH
+    assert flows[0]["context"]["entry_id"] == mock_config_entry.entry_id
+
+
 async def test_unload_entry(
     hass: HomeAssistant,
     mock_config_entry: MockConfigEntry,