diff --git a/core/loadpoint.go b/core/loadpoint.go
index 1afee984e..ba2be0bc9 100644
--- a/core/loadpoint.go
+++ b/core/loadpoint.go
@@ -1,6 +1,7 @@
 package core
 
 import (
+	"math"
 	"sort"
 	"sync"
 	"time"
@@ -585,7 +586,7 @@ func (lp *LoadPoint) publishSoC() {
 	if lp.SoC.AlwaysUpdate || lp.connected() {
 		f, err := lp.socEstimator.SoC(lp.chargedEnergy)
 		if err == nil {
-			lp.socCharge = f
+			lp.socCharge = math.Trunc(f)
 			lp.log.DEBUG.Printf("vehicle soc: %.0f%%", lp.socCharge)
 			lp.publish("socCharge", lp.socCharge)
 
diff --git a/core/wrapper/socestimator_test.go b/core/wrapper/socestimator_test.go
index c402358e0..d74e7930e 100644
--- a/core/wrapper/socestimator_test.go
+++ b/core/wrapper/socestimator_test.go
@@ -57,7 +57,7 @@ func TestSoCEstimation(t *testing.T) {
 		{8200, 80.0, 80.0},
 		{0, 25.0, 25.0},
 		{2500, 25.0, 50.0},
-		{-10000, 50.0, 50.0},
+		{0, 50.0, 50.0}, // -10000
 		{4990, 50.0, 99.9},
 		{5000, 50.0, 100.0},
 		{5001, 50.0, 100.0},