diff --git a/src/demo.py b/src/demo.py
index 7083cbe..40c67be 100644
--- a/src/demo.py
+++ b/src/demo.py
@@ -8,7 +8,7 @@
 
 import aiohttp
 
-from opower import AggregateType, Opower, get_supported_utility_subdomains
+from opower import AggregateType, Opower, get_supported_utilities
 
 
 async def _main():
@@ -16,7 +16,8 @@ async def _main():
     parser.add_argument(
         "--utility",
         help="Utility (subdomain of opower.com). Defaults to pge",
-        choices=get_supported_utility_subdomains(),
+        choices=[utility.__name__.lower() for utility in get_supported_utilities()],
+        type=str.lower,
         default="pge",
     )
     parser.add_argument(
diff --git a/src/opower/__init__.py b/src/opower/__init__.py
index 2e0a941..333f8e5 100644
--- a/src/opower/__init__.py
+++ b/src/opower/__init__.py
@@ -10,8 +10,8 @@
     Opower,
     UnitOfMeasure,
     UsageRead,
+    get_supported_utilities,
     get_supported_utility_names,
-    get_supported_utility_subdomains,
 )
 
 __all__ = [
@@ -25,6 +25,6 @@
     "Opower",
     "UnitOfMeasure",
     "UsageRead",
+    "get_supported_utilities",
     "get_supported_utility_names",
-    "get_supported_utility_subdomains",
 ]
diff --git a/src/opower/opower.py b/src/opower/opower.py
index a73b907..2e4b377 100644
--- a/src/opower/opower.py
+++ b/src/opower/opower.py
@@ -107,20 +107,24 @@ class UsageRead:
     consumption: float  # taken from consumption.value field, in KWH or THERM
 
 
+def get_supported_utilities() -> list[type["UtilityBase"]]:
+    """Return a list of all supported utilities."""
+    return UtilityBase.subclasses
+
+
 def get_supported_utility_names() -> list[str]:
     """Return a list of names of all supported utilities."""
     return [utility.name() for utility in UtilityBase.subclasses]
 
 
-def get_supported_utility_subdomains() -> list[str]:
-    """Return a list of subdomains of all supported utilities."""
-    return [utility.subdomain() for utility in UtilityBase.subclasses]
-
-
 def _select_utility(name_or_subdomain: str) -> type[UtilityBase]:
     """Return the utility with the given name or subdomain."""
     for utility in UtilityBase.subclasses:
-        if name_or_subdomain in [utility.name(), utility.subdomain()]:
+        if name_or_subdomain.lower() in [
+            utility.name().lower(),
+            utility.__name__.lower(),
+            utility.subdomain().lower(),
+        ]:
             return utility
     raise ValueError(f"Utility {name_or_subdomain} not found")