diff --git a/core/loadpoint.go b/core/loadpoint.go
index 80f0cf8b2..8da6bd78c 100644
--- a/core/loadpoint.go
+++ b/core/loadpoint.go
@@ -1332,7 +1332,11 @@ func (lp *Loadpoint) boostPower(batteryBoostPower float64) float64 {
 	delta := math.Max(100, math.Abs(lp.site.GetResidualPower()))
 
 	if lp.coarseCurrent() {
-		delta = math.Max(delta, lp.EffectiveStepPower())
+		// add effective step power to delta to make sure to step up to the next full amp
+		// just using lp.EffectiveStepPower() as delta is not enough because this will result
+		// in a too low current when there is a bit remaining grid consumption due to the accuracy
+		// of the battery controller
+		delta += lp.EffectiveStepPower()
 	}
 
 	// start boosting by setting maximum power