Fix bug in AC input power calculation

Specific to AC inputs on Multi RS systems

data/common/AcInputPhaseModel.qml

@@ -9,8 +9,6 @@ import Victron.VenusOS
 ListModel {
 	id: root
 
-	signal phaseValueChanged(int phaseIndex, string propertyName, real propertyValue)
-
 	readonly property bool _feedbackEnabled: Global.systemSettings.essFeedbackToGridEnabled
 
 	property Instantiator _phaseObjects: Instantiator {
@@ -25,7 +23,6 @@ ListModel {
 				onClampedCurrentValueChanged: {
 					if (model.index >= 0 && model.index < root.count) {
 						setProperty(model.index, "current", clampedCurrentValue)
-						root.phaseValueChanged(model.index, "current", clampedCurrentValue)
 					}
 				}
 			}
@@ -39,7 +36,6 @@ ListModel {
 				onClampedPowerValueChanged: {
 					if (model.index >= 0 && model.index < root.count) {
 						setProperty(model.index, "power", clampedPowerValue)
-						root.phaseValueChanged(model.index, "power", clampedPowerValue)
 					}
 				}
 			}

data/common/ActiveAcInput.qml

@@ -27,25 +27,15 @@ Device {
 	readonly property AcInputPhaseModel _phases: AcInputPhaseModel {
 		id: _phases
 
-		property real totalPower: NaN
-		property real firstPhaseCurrent: NaN
-
-		onPhaseValueChanged: function(phaseIndex, propertyName, propertyValue) {
-			if (propertyName === "power" && !root._acInputService.hasTotalPower) {
-				let total = NaN
-				for (let i = 0; i < phases.count; ++i) {
-					if (i === phaseIndex) {
-						total = Units.sumRealNumbers(total, propertyValue)
-					} else {
-						const phase = get(phaseIndex)
-						total = Units.sumRealNumbers(total, phase ? phase[propertyName] : NaN)
-					}
-				}
-				totalPower = total
-			} else if (propertyName === "current" && count === 1) {
-				firstPhaseCurrent = propertyValue
+		readonly property int totalPower: {
+			let sum = 0
+			for (let i = 0; i < count; ++i) {
+				sum += get(i).power || 0
 			}
+			return sum
 		}
+
+		property real firstPhaseCurrent: count === 1 ? get(0).current : NaN
 	}
 
 	// Data from the input-specific service, e.g. com.victronenergy.vebus for a VE.Bus input,