diff --git a/charger/dadapower.go b/charger/dadapower.go
index c21376231..f65bbe08c 100644
--- a/charger/dadapower.go
+++ b/charger/dadapower.go
@@ -21,6 +21,7 @@ const (
 	dadapowerRegActivePhases        = 1002
 	dadapowerRegCurrents            = 1006
 	dadapowerRegActiveEnergy        = 1009
+	dadapowerRegChargingPortState   = 1015
 	dadapowerRegPlugState           = 1016
 	dadapowerRegEnergyImportSession = 1017
 	dadapowerRegEnergyImportTotal   = 1025
@@ -110,6 +111,20 @@ func (wb *Dadapower) Status() (api.ChargeStatus, error) {
 	}
 }
 
+var _ api.StatusReasoner = (*Dadapower)(nil)
+
+// StatusReason implements the api.StatusReasoner interface
+func (wb *Dadapower) StatusReason() (api.Reason, error) {
+	res := api.ReasonUnknown
+
+	b, err := wb.conn.ReadHoldingRegisters(dadapowerRegChargingPortState, 2)
+	if err == nil && binary.BigEndian.Uint16(b) == 3 {
+		res = api.ReasonWaitingForAuthorization
+	}
+
+	return res, err
+}
+
 // Enabled implements the api.Charger interface
 func (wb *Dadapower) Enabled() (bool, error) {
 	b, err := wb.conn.ReadInputRegisters(dadapowerRegChargingAllowed+wb.regOffset, 1)