diff --git a/provider/const.go b/provider/const.go
index 6db48b8edb..6472eeb36b 100644
--- a/provider/const.go
+++ b/provider/const.go
@@ -26,7 +26,7 @@ func NewConstFromConfig(other map[string]interface{}) (Provider, error) {
 		return nil, err
 	}
 
-	pipe, err := pipeline.New(cc.Settings)
+	pipe, err := pipeline.New(nil, cc.Settings)
 	if err != nil {
 		return nil, err
 	}
diff --git a/provider/http.go b/provider/http.go
index 931c68d447..2ff66d4464 100644
--- a/provider/http.go
+++ b/provider/http.go
@@ -60,8 +60,9 @@ func NewHTTPProviderFromConfig(other map[string]interface{}) (Provider, error) {
 		return nil, err
 	}
 
+	log := util.NewLogger("http")
 	http := NewHTTP(
-		util.NewLogger("http"),
+		log,
 		cc.Method,
 		cc.URI,
 		cc.Insecure,
@@ -80,7 +81,7 @@ func NewHTTPProviderFromConfig(other map[string]interface{}) (Provider, error) {
 
 	if err == nil {
 		var pipe *pipeline.Pipeline
-		pipe, err = pipeline.New(cc.Settings)
+		pipe, err = pipeline.New(log, cc.Settings)
 		http = http.WithPipeline(pipe)
 	}
 
diff --git a/provider/mqtt.go b/provider/mqtt.go
index 2a589e01fa..986fc7af95 100644
--- a/provider/mqtt.go
+++ b/provider/mqtt.go
@@ -53,7 +53,7 @@ func NewMqttFromConfig(other map[string]interface{}) (Provider, error) {
 		m = m.WithRetained()
 	}
 
-	pipe, err := pipeline.New(cc.Settings)
+	pipe, err := pipeline.New(log, cc.Settings)
 	if err == nil {
 		m = m.WithPipeline(pipe)
 	}
diff --git a/provider/pipeline/pipeline.go b/provider/pipeline/pipeline.go
index a040a45b12..d99389d3fd 100644
--- a/provider/pipeline/pipeline.go
+++ b/provider/pipeline/pipeline.go
@@ -9,6 +9,7 @@ import (
 
 	xj "github.com/basgys/goxml2json"
 	"github.com/evcc-io/evcc/provider/javascript"
+	"github.com/evcc-io/evcc/util"
 	"github.com/evcc-io/evcc/util/jq"
 	"github.com/itchyny/gojq"
 	"github.com/robertkrimen/otto"
@@ -16,6 +17,7 @@ import (
 )
 
 type Pipeline struct {
+	log    *util.Logger
 	re     *regexp.Regexp
 	jq     *gojq.Query
 	dflt   string
@@ -35,8 +37,10 @@ type Settings struct {
 	Script  string
 }
 
-func New(cc Settings) (*Pipeline, error) {
-	p := new(Pipeline)
+func New(log *util.Logger, cc Settings) (*Pipeline, error) {
+	p := &Pipeline{
+		log: log,
+	}
 
 	var err error
 	if err == nil && cc.Regex != "" {
@@ -137,6 +141,10 @@ func (p *Pipeline) transformXML(value []byte) []byte {
 		return value
 	}
 
+	if p.log != nil {
+		p.log.TRACE.Println(out.String())
+	}
+
 	return out.Bytes()
 }
 
diff --git a/provider/socket.go b/provider/socket.go
index 4e64287f1e..61e04a7020 100644
--- a/provider/socket.go
+++ b/provider/socket.go
@@ -85,7 +85,7 @@ func NewSocketProviderFromConfig(other map[string]interface{}) (Provider, error)
 	}
 
 	var err error
-	if p.pipeline, err = pipeline.New(cc.Settings); err != nil {
+	if p.pipeline, err = pipeline.New(log, cc.Settings); err != nil {
 		return nil, err
 	}