diff --git a/openevsehttp/__main__.py b/openevsehttp/__main__.py
index ca5ae52..3a99c1a 100644
--- a/openevsehttp/__main__.py
+++ b/openevsehttp/__main__.py
@@ -581,6 +581,25 @@ def _version_check(self, min_version: str, max_version: str = "") -> bool:
             _LOGGER.debug("Non-semver firmware version detected.")
         return False
 
+    # Self production HTTP Posting
+
+    async def self_production(self, grid: int, solar: int, invert: bool = True) -> None:
+        """Send pushed sensor data to self-prodcution."""
+        if not self._version_check("4.0.0"):
+            _LOGGER.debug("Feature not supported for older firmware.")
+            raise UnsupportedFeature
+
+        # Invert the sensor -import/+export
+        if invert:
+            grid = grid * -1
+
+        url = f"{self.url}status"
+        data = {"solar": solar, "grid": grid}
+
+        _LOGGER.debug("Posting self-production: %s", data)
+        response = await self.process_request(url=url, method="post", data=data)
+        _LOGGER.debug("Self-production response: %s", response)
+
     @property
     def hostname(self) -> str:
         """Return charger hostname."""
diff --git a/tests/test_main.py b/tests/test_main.py
index dcb0558..59897f7 100644
--- a/tests/test_main.py
+++ b/tests/test_main.py
@@ -1501,3 +1501,24 @@ async def test_get_state_raw(fixture, expected, request):
     await charger.update()
     status = charger.mqtt_connected
     assert status == expected
+
+
+async def test_self_production(test_charger, test_charger_v2, mock_aioclient, caplog):
+    """Test self_production function."""
+    await test_charger.update()
+    mock_aioclient.post(
+        TEST_URL_STATUS,
+        status=200,
+        body='{"grid_ie": 3000, "solar": 1000}',
+    )
+    with caplog.at_level(logging.DEBUG):
+        await test_charger.self_production(-3000, 1000)
+        assert "Posting self-production: {'solar': 1000, 'grid': 3000}" in caplog.text
+        assert (
+            "Self-production response: {'grid_ie': 3000, 'solar': 1000}" in caplog.text
+        )
+
+    with pytest.raises(UnsupportedFeature):
+        with caplog.at_level(logging.DEBUG):
+            await test_charger_v2.self_production(-3000, 1000)
+            assert "Feature not supported for older firmware." in caplog.text
diff --git a/tox.ini b/tox.ini
index 9c5b4dd..22d1d6c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -32,3 +32,6 @@ commands =
   mypy openevsehttp
 deps =
   -rrequirements_lint.txt
+
+[flake8]
+max-line-length = 88
\ No newline at end of file