diff --git a/charger/abl.go b/charger/abl.go
index 92db07292..a49013450 100644
--- a/charger/abl.go
+++ b/charger/abl.go
@@ -2,7 +2,7 @@ package charger
 
 // LICENSE
 
-// Copyright (c) 2019-2021 andig
+// Copyright (c) 2019-2022 andig
 
 // This module is NOT covered by the MIT license. All rights reserved.
 
diff --git a/charger/alfen.go b/charger/alfen.go
index 3c7ec9b40..be4716e9d 100644
--- a/charger/alfen.go
+++ b/charger/alfen.go
@@ -2,7 +2,7 @@ package charger
 
 // LICENSE
 
-// Copyright (c) 2019-2021 andig
+// Copyright (c) 2019-2022 andig
 
 // This module is NOT covered by the MIT license. All rights reserved.
 
@@ -66,12 +66,12 @@ func NewAlfenFromConfig(other map[string]interface{}) (api.Charger, error) {
 		return nil, err
 	}
 
-	return NewAlfen(cc.URI, cc.Device, cc.Comset, cc.Baudrate, cc.ID)
+	return NewAlfen(cc.URI, cc.ID)
 }
 
 // NewAlfen creates Alfen charger
-func NewAlfen(uri, device, comset string, baudrate int, slaveID uint8) (api.Charger, error) {
-	conn, err := modbus.NewConnection(uri, device, comset, baudrate, modbus.Tcp, slaveID)
+func NewAlfen(uri string, slaveID uint8) (api.Charger, error) {
+	conn, err := modbus.NewConnection(uri, "", "", 0, modbus.Tcp, slaveID)
 	if err != nil {
 		return nil, err
 	}
diff --git a/charger/amtron.go b/charger/amtron.go
index ce5d4f64a..36aecedf5 100644
--- a/charger/amtron.go
+++ b/charger/amtron.go
@@ -2,7 +2,7 @@ package charger
 
 // LICENSE
 
-// Copyright (c) 2019-2021 andig
+// Copyright (c) 2019-2022 andig
 
 // This module is NOT covered by the MIT license. All rights reserved.
 
@@ -63,6 +63,8 @@ func NewAmtronFromConfig(other map[string]interface{}) (api.Charger, error) {
 
 // NewAmtron creates Amtron charger
 func NewAmtron(uri string, slaveID uint8) (api.Charger, error) {
+	uri = util.DefaultPort(uri, 502)
+
 	conn, err := modbus.NewConnection(uri, "", "", 0, modbus.Tcp, slaveID)
 	if err != nil {
 		return nil, err
diff --git a/charger/cfos.go b/charger/cfos.go
index 9a20bb829..08b37cba1 100644
--- a/charger/cfos.go
+++ b/charger/cfos.go
@@ -51,6 +51,10 @@ func NewCfosPowerBrain(uri string, id uint8) (*CfosPowerBrain, error) {
 		return nil, err
 	}
 
+	if !sponsor.IsAuthorized() {
+		return nil, api.ErrSponsorRequired
+	}
+
 	log := util.NewLogger("cfos")
 	conn.Logger(log.TRACE)
 
diff --git a/charger/easee.go b/charger/easee.go
index f83237212..e68c964da 100644
--- a/charger/easee.go
+++ b/charger/easee.go
@@ -2,7 +2,7 @@ package charger
 
 // LICENSE
 
-// Copyright (c) 2019-2021 andig
+// Copyright (c) 2019-2022 andig
 
 // This module is NOT covered by the MIT license. All rights reserved.
 
diff --git a/charger/go-e.go b/charger/go-e.go
index 93b05107e..60cfa18ca 100644
--- a/charger/go-e.go
+++ b/charger/go-e.go
@@ -1,19 +1,8 @@
 package charger
 
-import (
-	"errors"
-	"fmt"
-	"time"
-
-	"github.com/evcc-io/evcc/api"
-	goe "github.com/evcc-io/evcc/charger/go-e"
-	"github.com/evcc-io/evcc/util"
-	"github.com/evcc-io/evcc/util/sponsor"
-)
-
 // LICENSE
 
-// Copyright (c) 2019-2021 andig
+// Copyright (c) 2019-2022 andig
 
 // This module is NOT covered by the MIT license. All rights reserved.
 
@@ -28,6 +17,17 @@ import (
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 // SOFTWARE.
 
+import (
+	"errors"
+	"fmt"
+	"time"
+
+	"github.com/evcc-io/evcc/api"
+	goe "github.com/evcc-io/evcc/charger/go-e"
+	"github.com/evcc-io/evcc/util"
+	"github.com/evcc-io/evcc/util/sponsor"
+)
+
 // https://go-e.co/app/api.pdf
 // https://github.com/goecharger/go-eCharger-API-v1/
 // https://github.com/goecharger/go-eCharger-API-v2/
diff --git a/charger/heidelberg-ec.go b/charger/heidelberg-ec.go
index ce494eee6..60c240e65 100644
--- a/charger/heidelberg-ec.go
+++ b/charger/heidelberg-ec.go
@@ -2,7 +2,7 @@ package charger
 
 // LICENSE
 
-// Copyright (c) 2019-2021 andig
+// Copyright (c) 2019-2022 andig
 
 // This module is NOT covered by the MIT license. All rights reserved.
 
diff --git a/charger/innogy.go b/charger/innogy.go
index 6bc6b21a6..5c0ea0f7f 100644
--- a/charger/innogy.go
+++ b/charger/innogy.go
@@ -2,7 +2,7 @@ package charger
 
 // LICENSE
 
-// Copyright (c) 2019-2021 andig
+// Copyright (c) 2019-2022 andig
 
 // This module is NOT covered by the MIT license. All rights reserved.
 
diff --git a/charger/vestel.go b/charger/vestel.go
index 428a0a079..15ac62c1c 100644
--- a/charger/vestel.go
+++ b/charger/vestel.go
@@ -2,7 +2,7 @@ package charger
 
 // LICENSE
 
-// Copyright (c) 2019-2021 andig
+// Copyright (c) 2019-2022 andig
 
 // This module is NOT covered by the MIT license. All rights reserved.
 
diff --git a/vehicle/tronity.go b/vehicle/tronity.go
index a1df4fa3f..8a285f9c2 100644
--- a/vehicle/tronity.go
+++ b/vehicle/tronity.go
@@ -2,7 +2,7 @@ package vehicle
 
 // LICENSE
 
-// Copyright (c) 2019-2021 andig
+// Copyright (c) 2019-2022 andig
 
 // This module is NOT covered by the MIT license. All rights reserved.