diff --git a/charger/fritzdect.go b/charger/fritzdect.go
index ce9fe55ca..3141b3eae 100644
--- a/charger/fritzdect.go
+++ b/charger/fritzdect.go
@@ -34,6 +34,10 @@ func NewFritzDECTFromConfig(other map[string]interface{}) (api.Charger, error) {
 		return nil, err
 	}
 
+	if cc.User == "" || cc.Password == "" {
+		return nil, api.ErrMissingCredentials
+	}
+
 	return NewFritzDECT(cc.embed, cc.URI, cc.AIN, cc.User, cc.Password, cc.StandbyPower)
 }
 
diff --git a/charger/homematic.go b/charger/homematic.go
index 5730debd5..700c8b8bc 100644
--- a/charger/homematic.go
+++ b/charger/homematic.go
@@ -33,6 +33,10 @@ func NewCCUFromConfig(other map[string]interface{}) (api.Charger, error) {
 		return nil, err
 	}
 
+	if cc.User == "" || cc.Password == "" {
+		return nil, api.ErrMissingCredentials
+	}
+
 	return NewCCU(cc.embed, cc.URI, cc.Device, cc.MeterChannel, cc.SwitchChannel, cc.User, cc.Password, cc.StandbyPower)
 }
 
diff --git a/charger/tapo.go b/charger/tapo.go
index e629f3e68..3fdc2ec81 100644
--- a/charger/tapo.go
+++ b/charger/tapo.go
@@ -30,6 +30,10 @@ func NewTapoFromConfig(other map[string]interface{}) (api.Charger, error) {
 		return nil, err
 	}
 
+	if cc.User == "" || cc.Password == "" {
+		return nil, api.ErrMissingCredentials
+	}
+
 	return NewTapo(cc.embed, cc.URI, cc.User, cc.Password, cc.StandbyPower)
 }
 
diff --git a/meter/fritzdect.go b/meter/fritzdect.go
index d84855f00..925a13468 100644
--- a/meter/fritzdect.go
+++ b/meter/fritzdect.go
@@ -20,5 +20,9 @@ func NewFritzDECTFromConfig(other map[string]interface{}) (api.Meter, error) {
 		return nil, err
 	}
 
+	if cc.User == "" || cc.Password == "" {
+		return nil, api.ErrMissingCredentials
+	}
+
 	return fritzdect.NewConnection(cc.URI, cc.AIN, cc.User, cc.Password)
 }
diff --git a/meter/homematic.go b/meter/homematic.go
index 0b417f9f5..dcbece84f 100644
--- a/meter/homematic.go
+++ b/meter/homematic.go
@@ -32,6 +32,10 @@ func NewCCUFromConfig(other map[string]interface{}) (api.Meter, error) {
 		return nil, err
 	}
 
+	if cc.User == "" || cc.Password == "" {
+		return nil, api.ErrMissingCredentials
+	}
+
 	return NewCCU(cc.URI, cc.Device, cc.MeterChannel, cc.SwitchChannel, cc.User, cc.Password, cc.Usage)
 }
 
diff --git a/meter/tapo.go b/meter/tapo.go
index d1dfbd840..83c75d715 100644
--- a/meter/tapo.go
+++ b/meter/tapo.go
@@ -23,5 +23,9 @@ func NewTapoFromConfig(other map[string]interface{}) (api.Meter, error) {
 		return nil, err
 	}
 
+	if cc.User == "" || cc.Password == "" {
+		return nil, api.ErrMissingCredentials
+	}
+
 	return tapo.NewConnection(cc.URI, cc.User, cc.Password)
 }