diff --git a/core/helper.go b/core/helper.go
index 56ee48786..f9dab5a54 100644
--- a/core/helper.go
+++ b/core/helper.go
@@ -6,7 +6,6 @@ import (
 	"slices"
 
 	"github.com/evcc-io/evcc/api"
-	hemsapi "github.com/evcc-io/evcc/hems/hems"
 	"github.com/evcc-io/evcc/util/config"
 )
 
@@ -78,24 +77,6 @@ func circuitMaxPower(circuit api.Circuit) float64 {
 	return circuit.GetMaxPower()
 }
 
-// hemsDimmed returns the HEMS dim status, nil-safe
-func hemsDimmed(hems api.HEMS) *bool {
-	if hems == nil {
-		return nil
-	}
-
-	return hemsapi.Dimmed(hems)
-}
-
-// hemsCurtailed returns whether HEMS curtailment is active, nil-safe
-func hemsCurtailed(hems api.HEMS) *bool {
-	if hems == nil {
-		return nil
-	}
-
-	return hemsapi.Curtailed(hems)
-}
-
 // nonZeroEnergy reports a zero lifetime energy reading as api.ErrNotAvailable.
 func nonZeroEnergy(f float64, err error) (float64, error) {
 	if err == nil && f == 0 {
diff --git a/core/site.go b/core/site.go
index 9e6b276a5..9acb8f216 100644
--- a/core/site.go
+++ b/core/site.go
@@ -26,6 +26,7 @@ import (
 	"github.com/evcc-io/evcc/core/soc"
 	"github.com/evcc-io/evcc/core/types"
 	"github.com/evcc-io/evcc/core/vehicle"
+	"github.com/evcc-io/evcc/hems/hems"
 	"github.com/evcc-io/evcc/messenger"
 	"github.com/evcc-io/evcc/server/db"
 	"github.com/evcc-io/evcc/server/db/settings"
@@ -1089,7 +1090,7 @@ func (site *Site) update(lp updater) {
 		var wg sync.WaitGroup
 
 		wg.Go(func() {
-			if dim := hemsDimmed(site.hems); dim != nil {
+			if dim := hems.Dimmed(site.hems); dim != nil {
 				if err := site.dimMeters(*dim); err != nil {
 					site.log.ERROR.Println(err)
 				}
@@ -1097,7 +1098,7 @@ func (site *Site) update(lp updater) {
 		})
 
 		wg.Go(func() {
-			if hemsCurtailed(site.hems) != nil {
+			if hems.Curtailed(site.hems) != nil {
 				if err := site.curtailPV(site.hems.CurtailedPercent()); err != nil {
 					site.log.ERROR.Println(err)
 				}
@@ -1145,7 +1146,7 @@ func (site *Site) update(lp updater) {
 			lp.Update(
 				sitePower, max(0, site.battery.Power), consumption, feedin, batteryBuffered, batteryStart,
 				greenShareLoadpoints, site.effectivePrice(greenShareLoadpoints), site.effectiveCo2(greenShareLoadpoints),
-				hemsDimmed(site.hems),
+				hems.Dimmed(site.hems),
 			)
 		}
 
diff --git a/core/site_battery.go b/core/site_battery.go
index b379b9cce..4cc18822a 100644
--- a/core/site_battery.go
+++ b/core/site_battery.go
@@ -7,6 +7,7 @@ import (
 	"github.com/evcc-io/evcc/api"
 	"github.com/evcc-io/evcc/core/keys"
 	"github.com/evcc-io/evcc/core/loadpoint"
+	"github.com/evcc-io/evcc/hems/hems"
 	"github.com/evcc-io/evcc/util/config"
 )
 
@@ -57,7 +58,7 @@ func (site *Site) updateBatteryMode(batteryGridChargeActive bool, rate api.Rate)
 
 	// put battery into hold mode when charging is active and HEMS dimmed
 	fromToCharge := batteryMode == api.BatteryCharge || batteryMode == api.BatteryUnknown && site.batteryMode == api.BatteryCharge
-	if dimmed := hemsDimmed(site.hems); fromToCharge && dimmed != nil && *dimmed {
+	if dimmed := hems.Dimmed(site.hems); fromToCharge && dimmed != nil && *dimmed {
 		site.log.DEBUG.Println("battery mode: HEMS dimmed")
 		batteryMode = api.BatteryHold
 	}
diff --git a/hems/hems/globals.go b/hems/hems/globals.go
index 41b3b3c09..a3f57c565 100644
--- a/hems/hems/globals.go
+++ b/hems/hems/globals.go
@@ -4,6 +4,10 @@ import "github.com/evcc-io/evcc/api"
 
 // Dimmed reports nil until MaxConsumptionPower is known (see api.HEMS).
 func Dimmed(hems api.HEMS) *bool {
+	if hems == nil {
+		return nil
+	}
+
 	dimmed := hems.MaxConsumptionPower()
 	if dimmed == nil {
 		return nil
@@ -13,10 +17,13 @@ func Dimmed(hems api.HEMS) *bool {
 }
 
 func Curtailed(hems api.HEMS) *bool {
-	percent := hems.CurtailedPercent()
-	if percent == nil {
+	if hems == nil {
 		return nil
 	}
 
-	return new(*percent < 100)
+	if percent := hems.CurtailedPercent(); percent != nil {
+		return new(*percent < 100)
+	}
+
+	return nil
 }