diff --git a/ClusterController/ClusterStatus.py b/ClusterController/ClusterStatus.py
index 111af65..9a4be60 100644
--- a/ClusterController/ClusterStatus.py
+++ b/ClusterController/ClusterStatus.py
@@ -147,19 +147,22 @@ class ClusterStatus:
 		"""
 		fEnergySavings = 0.0
 		for machine in self.m_clusterNodes.itervalues():
-			fEnergySavings += machine.getEnergySavings()
+			if machine.isReady():
+				fEnergySavings += machine.getEnergySavings()
 		return fEnergySavings
 		
 	def getCurrentPowerConsumption( self ):
 		fPowerConsumption = 0.0
 		for machine in self.m_clusterNodes.itervalues():
-			fPowerConsumption += machine.getPowerConsumption()
+			if machine.isReady():
+				fPowerConsumption += machine.getPowerConsumption()
 		return fPowerConsumption
 		
 	def getCurrentPowerSavings( self ):
 		fPowerSavings = 0.0
 		for machine in self.m_clusterNodes.itervalues():
-			fPowerSavings += machine.getPowerConsumptionForPowerState( PowerState.ON ) - machine.getPowerConsumption()
+			if machine.isReady():
+				fPowerSavings += machine.getPowerConsumptionForPowerState( PowerState.ON ) - machine.getPowerConsumption()
 		return fPowerSavings
 
 	def getNumControlledSlots( self ):