diff --git a/homeassistant/components/energy/validate.py b/homeassistant/components/energy/validate.py
index e48a576f44e..3baae348770 100644
--- a/homeassistant/components/energy/validate.py
+++ b/homeassistant/components/energy/validate.py
@@ -10,6 +10,7 @@ from homeassistant.components import recorder, sensor
 from homeassistant.const import (
     ATTR_DEVICE_CLASS,
     ENERGY_KILO_WATT_HOUR,
+    ENERGY_MEGA_WATT_HOUR,
     ENERGY_WATT_HOUR,
     STATE_UNAVAILABLE,
     STATE_UNKNOWN,
@@ -23,7 +24,11 @@ from .const import DOMAIN
 
 ENERGY_USAGE_DEVICE_CLASSES = (sensor.SensorDeviceClass.ENERGY,)
 ENERGY_USAGE_UNITS = {
-    sensor.SensorDeviceClass.ENERGY: (ENERGY_KILO_WATT_HOUR, ENERGY_WATT_HOUR)
+    sensor.SensorDeviceClass.ENERGY: (
+        ENERGY_KILO_WATT_HOUR,
+        ENERGY_MEGA_WATT_HOUR,
+        ENERGY_WATT_HOUR,
+    )
 }
 ENERGY_PRICE_UNITS = tuple(
     f"/{unit}" for units in ENERGY_USAGE_UNITS.values() for unit in units
diff --git a/tests/components/energy/test_validate.py b/tests/components/energy/test_validate.py
index e802688daaf..fe71663d41b 100644
--- a/tests/components/energy/test_validate.py
+++ b/tests/components/energy/test_validate.py
@@ -4,6 +4,11 @@ from unittest.mock import patch
 import pytest
 
 from homeassistant.components.energy import async_get_manager, validate
+from homeassistant.const import (
+    ENERGY_KILO_WATT_HOUR,
+    ENERGY_MEGA_WATT_HOUR,
+    ENERGY_WATT_HOUR,
+)
 from homeassistant.helpers.json import JSON_DUMP
 from homeassistant.setup import async_setup_component
 
@@ -60,16 +65,18 @@ async def test_validation_empty_config(hass):
 
 
 @pytest.mark.parametrize(
-    "state_class, extra",
+    "state_class, energy_unit, extra",
     [
-        ("total_increasing", {}),
-        ("total", {}),
-        ("total", {"last_reset": "abc"}),
-        ("measurement", {"last_reset": "abc"}),
+        ("total_increasing", ENERGY_KILO_WATT_HOUR, {}),
+        ("total_increasing", ENERGY_MEGA_WATT_HOUR, {}),
+        ("total_increasing", ENERGY_WATT_HOUR, {}),
+        ("total", ENERGY_KILO_WATT_HOUR, {}),
+        ("total", ENERGY_KILO_WATT_HOUR, {"last_reset": "abc"}),
+        ("measurement", ENERGY_KILO_WATT_HOUR, {"last_reset": "abc"}),
     ],
 )
 async def test_validation(
-    hass, mock_energy_manager, mock_get_metadata, state_class, extra
+    hass, mock_energy_manager, mock_get_metadata, state_class, energy_unit, extra
 ):
     """Test validating success."""
     for key in ("device_cons", "battery_import", "battery_export", "solar_production"):
@@ -78,7 +85,7 @@ async def test_validation(
             "123",
             {
                 "device_class": "energy",
-                "unit_of_measurement": "kWh",
+                "unit_of_measurement": energy_unit,
                 "state_class": state_class,
                 **extra,
             },