diff --git a/pkgs/development/python-modules/iotawattpy/default.nix b/pkgs/development/python-modules/ha-iotawattpy/default.nix
similarity index 69%
rename from pkgs/development/python-modules/iotawattpy/default.nix
rename to pkgs/development/python-modules/ha-iotawattpy/default.nix
index d7a4be359467..c50c500e31f5 100644
--- a/pkgs/development/python-modules/iotawattpy/default.nix
+++ b/pkgs/development/python-modules/ha-iotawattpy/default.nix
@@ -4,20 +4,23 @@
   fetchPypi,
   httpx,
   pythonOlder,
+  setuptools,
 }:
 
 buildPythonPackage rec {
-  pname = "iotawattpy";
-  version = "0.1.0";
-  format = "setuptools";
+  pname = "ha-iotawattpy";
+  version = "0.1.2";
+  pyproject = true;
 
   disabled = pythonOlder "3.8";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1pyxm87lvd6zy0rx7r9jivk2li267r3xr0b9p6vf0v0vp9fmgsw3";
+    hash = "sha256-eMsBEbmENjbJME9Gzo4O9LbGo1i0MP0IuwLUAYqxbI8=";
   };
 
+  build-system = [ setuptools ];
+
   propagatedBuildInputs = [ httpx ];
 
   # Project doesn't tag releases or ship the tests with PyPI
@@ -27,7 +30,7 @@ buildPythonPackage rec {
   pythonImportsCheck = [ "iotawattpy" ];
 
   meta = with lib; {
-    description = "Python interface for the IoTaWatt device";
+    description = "Python library for the IoTaWatt Energy device";
     homepage = "https://github.com/gtdiehl/iotawattpy";
     license = licenses.gpl3Plus;
     maintainers = with maintainers; [ fab ];
diff --git a/pkgs/servers/home-assistant/component-packages.nix b/pkgs/servers/home-assistant/component-packages.nix
index f42d6274ab50..74ac5243550d 100644
--- a/pkgs/servers/home-assistant/component-packages.nix
+++ b/pkgs/servers/home-assistant/component-packages.nix
@@ -2734,7 +2734,8 @@
       ];
     "iotawatt" =
       ps: with ps; [
-      ]; # missing inputs: ha-iotawattpy
+        ha-iotawattpy
+      ];
     "iotty" =
       ps: with ps; [
         iottycloud
@@ -7181,6 +7182,7 @@
     "intent_script"
     "iometer"
     "ios"
+    "iotawatt"
     "iotty"
     "ipma"
     "ipp"
diff --git a/pkgs/top-level/python-aliases.nix b/pkgs/top-level/python-aliases.nix
index 040c91738a09..cb90d3b467a7 100644
--- a/pkgs/top-level/python-aliases.nix
+++ b/pkgs/top-level/python-aliases.nix
@@ -338,6 +338,7 @@ mapAliases ({
   imgaug = throw "imgaug has been removed as it is no longer maintained"; # added 2023-07-10
   imgtool = throw "imgtool has been promoted to a top-level attribute name: `mcuboot-imgtool`"; # added 2024-10-09
   intreehook = throw "intreehooks has been removed because it is obsolete as a backend-path key was added to PEP 517"; # added 2023-04-11
+  iotawattpy = ha-iotawattpy; # added 2025-07-06
   ipaddress = throw "ipaddress has been removed because it is no longer required since python 2.7."; # added 2022-05-30
   ipdbplugin = throw "ipdbplugin has been removed because it has no longer maintained for 6 years"; # added 2024-05-21
   ipython_genutils = ipython-genutils; # added 2023-10-12
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index f6c19bdf00f9..27524ffd0139 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -6328,6 +6328,8 @@ self: super: with self; {
 
   ha-ffmpeg = callPackage ../development/python-modules/ha-ffmpeg { };
 
+  ha-iotawattpy = callPackage ../development/python-modules/ha-iotawattpy { };
+
   ha-mqtt-discoverable = callPackage ../development/python-modules/ha-mqtt-discoverable { };
 
   ha-philipsjs = callPackage ../development/python-modules/ha-philipsjs { };
@@ -7040,8 +7042,6 @@ self: super: with self; {
 
   iosbackup = callPackage ../development/python-modules/iosbackup { };
 
-  iotawattpy = callPackage ../development/python-modules/iotawattpy { };
-
   iottycloud = callPackage ../development/python-modules/iottycloud { };
 
   iowait = callPackage ../development/python-modules/iowait { };