diff --git a/pollination/daylight_factor/_prepare_folder.py b/pollination/daylight_factor/_prepare_folder.py
index 0959c3e..4ee22ee 100644
--- a/pollination/daylight_factor/_prepare_folder.py
+++ b/pollination/daylight_factor/_prepare_folder.py
@@ -95,7 +95,7 @@ def create_octree(
     )
     def split_grid_folder(
         self, input_folder=create_rad_folder._outputs.model_folder,
-        cpu_count=cpu_count, cpus_per_grid=3, min_sensor_count=min_sensor_count
+        cpu_count=cpu_count, cpus_per_grid=1, min_sensor_count=min_sensor_count
     ):
         """Split sensor grid folder based on the number of CPUs"""
         return [