diff --git a/esphome/components/sdm_meter/sensor.py b/esphome/components/sdm_meter/sensor.py
index 13cc94786c..c3af47a664 100644
--- a/esphome/components/sdm_meter/sensor.py
+++ b/esphome/components/sdm_meter/sensor.py
@@ -47,6 +47,7 @@ PHASE_SENSORS = {
         unit_of_measurement=UNIT_VOLT,
         accuracy_decimals=2,
         device_class=DEVICE_CLASS_VOLTAGE,
+        state_class=STATE_CLASS_MEASUREMENT,
     ),
     CONF_CURRENT: sensor.sensor_schema(
         unit_of_measurement=UNIT_AMPERE,