diff --git a/charger/phoenix-emcp.go b/charger/phoenix-emcp.go
index 3306cb5c4..60fa9ce64 100644
--- a/charger/phoenix-emcp.go
+++ b/charger/phoenix-emcp.go
@@ -2,6 +2,7 @@ package charger
 
 import (
 	"fmt"
+	"net"
 	"time"
 
 	"github.com/andig/evcc/api"
@@ -17,7 +18,7 @@ const (
 )
 
 // PhoenixEMCP is an api.ChargeController implementation for Phoenix EM-CP-PP-ETH wallboxes.
-// It uses Modbus TCP to communicate with the wallbox at modbus client id 255.
+// It uses Modbus TCP to communicate with the wallbox at modbus client id 180.
 type PhoenixEMCP struct {
 	log     *util.Logger
 	client  modbus.Client
@@ -32,8 +33,13 @@ func NewPhoenixEMCPFromConfig(log *util.Logger, other map[string]interface{}) ap
 	}{}
 	util.DecodeOther(log, other, &cc)
 
+	if _, _, err := net.SplitHostPort(cc.URI); err != nil {
+		log.FATAL.Printf("config: missing or invalid phoenix EM-CP uri: %s", cc.URI)
+	}
+
 	if cc.ID == 0 {
-		log.FATAL.Fatal("config: missing slave id")
+		cc.ID = 180
+		log.WARN.Printf("config: missing phoenix EM-CP slave id, assuming default %d", cc.ID)
 	}
 
 	return NewPhoenixEMCP(cc.URI, cc.ID)
diff --git a/charger/phoenix-evcc.go b/charger/phoenix-evcc.go
index 7a5dbac3a..8be102c02 100644
--- a/charger/phoenix-evcc.go
+++ b/charger/phoenix-evcc.go
@@ -30,7 +30,8 @@ func NewPhoenixEVCCFromConfig(log *util.Logger, other map[string]interface{}) ap
 	util.DecodeOther(log, other, &cc)
 
 	if cc.ID == 0 {
-		log.FATAL.Fatal("config: missing slave id")
+		cc.ID = 255
+		log.WARN.Printf("config: missing phoenix EV-CC slave id, assuming default %d", cc.ID)
 	}
 
 	return NewPhoenixEVCC(cc.URI, cc.Device, cc.Comset, cc.Baudrate, cc.ID)
diff --git a/charger/wallbe.go b/charger/wallbe.go
index 12849bcd8..457984b39 100644
--- a/charger/wallbe.go
+++ b/charger/wallbe.go
@@ -3,6 +3,7 @@ package charger
 import (
 	"encoding/binary"
 	"fmt"
+	"net"
 	"time"
 
 	"github.com/andig/evcc/api"
@@ -42,6 +43,11 @@ func NewWallbeFromConfig(log *util.Logger, other map[string]interface{}) *Wallbe
 	}{}
 	util.DecodeOther(log, other, &cc)
 
+	if _, _, err := net.SplitHostPort(cc.URI); err != nil {
+		cc.URI = "192.168.0.8:502"
+		log.WARN.Printf("config: missing or invalid wallbe uri, using default %s", cc.URI)
+	}
+
 	wb := NewWallbe(cc.URI)
 
 	if cc.Legacy {
@@ -53,10 +59,6 @@ func NewWallbeFromConfig(log *util.Logger, other map[string]interface{}) *Wallbe
 
 // NewWallbe creates a Wallbe charger
 func NewWallbe(conn string) *Wallbe {
-	if conn == "" {
-		conn = "192.168.0.8:502"
-	}
-
 	handler := modbus.NewTCPClientHandler(conn)
 	client := modbus.NewClient(handler)
 
diff --git a/charger/wallbe_test.go b/charger/wallbe_test.go
index 7fd22f26b..d3a31a08a 100644
--- a/charger/wallbe_test.go
+++ b/charger/wallbe_test.go
@@ -1,15 +1,19 @@
 package charger
 
-import "testing"
+import (
+	"testing"
+
+	"github.com/andig/evcc/util"
+)
 
 func TestWallbe(t *testing.T) {
-	wb := NewWallbeFromConfig(nil, nil)
+	wb := NewWallbeFromConfig(util.NewLogger(""), nil)
 
 	if wb.factor != 10 {
 		t.Errorf("invalid factor: %d", wb.factor)
 	}
 
-	wb = NewWallbeFromConfig(nil, map[string]interface{}{"legacy": true})
+	wb = NewWallbeFromConfig(util.NewLogger(""), map[string]interface{}{"legacy": true})
 
 	if wb.factor != 1 {
 		t.Errorf("invalid factor: %d", wb.factor)