diff --git a/zhaquirks/ubisys/__init__.py b/zhaquirks/ubisys/__init__.py
new file mode 100644
index 0000000000..6bba0ffdcf
--- /dev/null
+++ b/zhaquirks/ubisys/__init__.py
@@ -0,0 +1 @@
+"""Ubisys device support."""
diff --git a/zhaquirks/ubisys/switching_actuator_series_2.py b/zhaquirks/ubisys/switching_actuator_series_2.py
new file mode 100644
index 0000000000..661e2d3cab
--- /dev/null
+++ b/zhaquirks/ubisys/switching_actuator_series_2.py
@@ -0,0 +1,21 @@
+"""Ubisys Switching Actuator S1-R (Series 2) quirk."""
+
+from zigpy.quirks import CustomCluster
+from zigpy.quirks.v2 import QuirkBuilder
+from zigpy.zcl.clusters.homeautomation import ElectricalMeasurement
+
+
+class UbisysElectricalMeasurement(CustomCluster, ElectricalMeasurement):
+    """Sets divisor attributes missing on the device."""
+
+    _CONSTANT_ATTRIBUTES = {
+        ElectricalMeasurement.AttributeDefs.ac_voltage_divisor.id: 10,
+        ElectricalMeasurement.AttributeDefs.ac_frequency_divisor.id: 10,
+    }
+
+
+(
+    QuirkBuilder(manufacturer="ubisys", model="S1-R (5601)")
+    .replaces(UbisysElectricalMeasurement)
+    .add_to_registry()
+)