diff --git a/csaxs_bec/devices/jungfraujoch/eiger.py b/csaxs_bec/devices/jungfraujoch/eiger.py
index 0d577a7..4ff60a4 100644
--- a/csaxs_bec/devices/jungfraujoch/eiger.py
+++ b/csaxs_bec/devices/jungfraujoch/eiger.py
@@ -279,18 +279,18 @@ class Eiger(PSIDeviceBase):
         try:
             incident_energy = self._get_beam_energy(self.device_manager)
             if self._incident_energy is None:
-                self._incident_energy = incident_energy
+                self._incident_energy = float(round(incident_energy, 3))
             elif not np.isclose(
                 self._incident_energy, incident_energy, atol=0.01
             ):  # 10 keV tolerance
                 logger.warning(
                     f"Incident energy changed from {self._incident_energy} keV to {incident_energy} keV for device {self.name}. "
                 )
-                self._incident_energy = incident_energy
+                self._incident_energy = float(round(incident_energy, 3))
         except Exception as e:
             logger.warning(f"Failed to set up beam energy for {self.name}: {e}")
             incident_energy = 12.0  #    default to 12 keV if error occurs
-            self._incident_energy = incident_energy
+            self._incident_energy = float(round(incident_energy, 3))
 
         logger.info(f"Device {self.name} uses incident energy of {incident_energy} keV.")