diff --git a/pkgs/development/python-modules/aio-wattwaechter/default.nix b/pkgs/development/python-modules/aio-wattwaechter/default.nix
new file mode 100644
index 000000000000..466c8f726089
--- /dev/null
+++ b/pkgs/development/python-modules/aio-wattwaechter/default.nix
@@ -0,0 +1,43 @@
+{
+  lib,
+  buildPythonPackage,
+  fetchFromGitHub,
+  setuptools,
+  aiohttp,
+  aioresponses,
+  pytest-asyncio,
+  pytestCheckHook,
+}:
+
+buildPythonPackage (finalAttrs: {
+  pname = "aio-wattwaechter";
+  version = "1.1.0";
+  pyproject = true;
+
+  src = fetchFromGitHub {
+    owner = "SmartCircuits-GmbH";
+    repo = "WattWaechter-PyPI";
+    tag = "v${finalAttrs.version}";
+    hash = "sha256-hM2DGQBEUr1HYd0CDdjRdFA7+HKaF2kLVFrAWCjP+CU=";
+  };
+
+  build-system = [ setuptools ];
+
+  dependencies = [ aiohttp ];
+
+  nativeCheckInputs = [
+    aioresponses
+    pytest-asyncio
+    pytestCheckHook
+  ];
+
+  pythonImportsCheck = [ "aio_wattwaechter" ];
+
+  meta = {
+    description = "Async Python client for the WattWächter smart meter API";
+    homepage = "https://github.com/SmartCircuits-GmbH/WattWaechter-PyPI";
+    changelog = "https://github.com/SmartCircuits-GmbH/WattWaechter-PyPI/releases/tag/${finalAttrs.src.tag}";
+    license = lib.licenses.asl20;
+    maintainers = [ lib.maintainers.jamiemagee ];
+  };
+})
diff --git a/pkgs/servers/home-assistant/component-packages.nix b/pkgs/servers/home-assistant/component-packages.nix
index 8aec8c6d20f8..779db0d0307a 100644
--- a/pkgs/servers/home-assistant/component-packages.nix
+++ b/pkgs/servers/home-assistant/component-packages.nix
@@ -7370,7 +7370,8 @@
       ];
     "wattwaechter" =
       ps: with ps; [
-      ]; # missing inputs: aio-wattwaechter
+        aio-wattwaechter
+      ];
     "waze_travel_time" =
       ps: with ps; [
         pywaze
@@ -8868,6 +8869,7 @@
     "watergate"
     "watts"
     "watttime"
+    "wattwaechter"
     "waze_travel_time"
     "weather"
     "weatherflow"
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 2604e7a1364b..2cf0754154e6 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -208,6 +208,8 @@ self: super: with self; {
 
   aio-pika = callPackage ../development/python-modules/aio-pika { };
 
+  aio-wattwaechter = callPackage ../development/python-modules/aio-wattwaechter { };
+
   aioacaia = callPackage ../development/python-modules/aioacaia { };
 
   aioairctrl = callPackage ../development/python-modules/aioairctrl { };