diff --git a/ClusterController/ClusterStatus.py b/ClusterController/ClusterStatus.py
index 9a4be60..4cc60f9 100644
--- a/ClusterController/ClusterStatus.py
+++ b/ClusterController/ClusterStatus.py
@@ -138,7 +138,8 @@ class ClusterStatus:
 		"""
 		fEnergyConsumption = 0.0
 		for machine in self.m_clusterNodes.itervalues():
-			fEnergyConsumption += machine.getEnergyConsumption()
+			if machine.isReady():
+				fEnergyConsumption += machine.getEnergyConsumption()
 		return fEnergyConsumption
 		
 	def getEnergySavings( self ):