diff --git a/esphome/const.py b/esphome/const.py
index ec583beeb6..7813b72bfa 100644
--- a/esphome/const.py
+++ b/esphome/const.py
@@ -1169,7 +1169,7 @@ UNIT_KILOMETER = "km"
 UNIT_KILOMETER_PER_HOUR = "km/h"
 UNIT_KILOVOLT_AMPS = "kVA"
 UNIT_KILOVOLT_AMPS_HOURS = "kVAh"
-UNIT_KILOVOLT_AMPS_REACTIVE = "kVAR"
+UNIT_KILOVOLT_AMPS_REACTIVE = "kvar"
 UNIT_KILOVOLT_AMPS_REACTIVE_HOURS = "kvarh"
 UNIT_KILOWATT = "kW"
 UNIT_KILOWATT_HOURS = "kWh"