diff --git a/dbus-node-red-grid-meter/grid_meter.py b/dbus-node-red-grid-meter/grid_meter.py
index ff83ec7..201b678 100644
--- a/dbus-node-red-grid-meter/grid_meter.py
+++ b/dbus-node-red-grid-meter/grid_meter.py
@@ -34,7 +34,7 @@ class NodeRedMetergrid-meter:
     # Create the mandatory objects
     self._dbusservice.add_path('/DeviceInstance', deviceinstance)
     self._dbusservice.add_path('/ProductId', 45069)
-    self._dbusservice.add_path('/DeviceType', 345)
+    self._dbusservice.add_path('/DeviceType', 1744) # EM540 for faster ESS control loop
     self._dbusservice.add_path('/ProductName', productname)
     self._dbusservice.add_path('/CustomName', productname)    
     self._dbusservice.add_path('/Latency', None)