diff --git a/hub/imports/energy_systems/north_america_custom_energy_system_parameters.py b/hub/imports/energy_systems/north_america_custom_energy_system_parameters.py
index 9db1d445..30ca9465 100644
--- a/hub/imports/energy_systems/north_america_custom_energy_system_parameters.py
+++ b/hub/imports/energy_systems/north_america_custom_energy_system_parameters.py
@@ -150,14 +150,19 @@ class NorthAmericaCustomEnergySystemParameters:
           _building_energy_equipment = EnergySystem()
           _building_energy_equipment.name = _generic_building_energy_system.name
           _building_energy_equipment.demand_types = _generic_building_energy_system.demand_types
-          _building_generation_system = GenerationSystem()
-          _building_generation_system.generic_generation_system = \
-            copy.deepcopy(_generic_building_energy_system.generation_systems)
+          _generation_systems = []
+          _generic_building_generation_systems = _generic_building_energy_system.generation_systems
+          for _generic_building_generation_system in _generic_building_generation_systems:
+            _building_generation_system = GenerationSystem()
+            _building_generation_system.generic_generation_system = \
+              copy.deepcopy(_generic_building_generation_system)
+            _generation_systems.append(_building_generation_system)
+          _building_energy_equipment.generation_systems = _generation_systems
           _building_storage_system = ThermalStorageSystem()
           _building_storage_system.generic_storage_system = \
             copy.deepcopy(_generic_building_energy_system.energy_storage_systems)
 
-          _building_energy_equipment.generation_systems = _building_generation_system
+
           _building_energy_equipment.energy_storage_systems = _building_storage_system
 
           _building_energy_systems.append(_building_energy_equipment)