diff --git a/core/loadpoint.go b/core/loadpoint.go
index 1016ebb64..145f8a3af 100644
--- a/core/loadpoint.go
+++ b/core/loadpoint.go
@@ -50,7 +50,7 @@ const (
 	timerInactive = "inactive"
 
 	minActiveCurrent = 1.0 // minimum current at which a phase is treated as active
-	minActiveVoltage = 208 // minimum voltage at which a phase is treated as active
+	minActiveVoltage = 207 // minimum voltage at which a phase is treated as active
 
 	guardGracePeriod          = 60 * time.Second // allow out of sync during this timespan
 	phaseSwitchCommandTimeout = 30 * time.Second // do not sync charger enabled/disabled state during this timespan
@@ -1261,15 +1261,15 @@ func (lp *Loadpoint) updateChargeVoltages() {
 	lp.publish("chargeVoltages", chargeVoltages)
 
 	// Quine-McCluskey for (¬L1∧L2∧¬L3) ∨ (L1∧L2∧¬L3) ∨ (¬L1∧¬L2∧L3) ∨ (L1∧¬L2∧L3) ∨ (¬L1∧L2∧L3) -> ¬L1 ∧ L3 ∨ L2 ∧ ¬L3 ∨ ¬L2 ∧ L3
-	if !(u1 > minActiveVoltage) && (u3 > minActiveVoltage) || (u2 > minActiveVoltage) && !(u3 > minActiveVoltage) || !(u2 > minActiveVoltage) && (u3 > minActiveVoltage) {
+	if !(u1 >= minActiveVoltage) && (u3 >= minActiveVoltage) || (u2 >= minActiveVoltage) && !(u3 >= minActiveVoltage) || !(u2 >= minActiveVoltage) && (u3 >= minActiveVoltage) {
 		lp.log.WARN.Printf("invalid phase wiring between charge meter and charger")
 	}
 
 	var phases int
-	if (u1 > minActiveVoltage) || (u2 > minActiveVoltage) || (u3 > minActiveVoltage) {
+	if (u1 >= minActiveVoltage) || (u2 >= minActiveVoltage) || (u3 >= minActiveVoltage) {
 		phases = 3
 	}
-	if (u1 > minActiveVoltage) && (u2 < minActiveVoltage) && (u3 < minActiveVoltage) {
+	if (u1 >= minActiveVoltage) && (u2 < minActiveVoltage) && (u3 < minActiveVoltage) {
 		phases = 1
 	}