diff --git a/reoptjl/src/process_results.py b/reoptjl/src/process_results.py
index dd22d08e5..5b5732d69 100644
--- a/reoptjl/src/process_results.py
+++ b/reoptjl/src/process_results.py
@@ -141,8 +141,10 @@ def update_inputs_in_database(inputs_to_update: dict, run_uuid: str) -> None:
             else:
                 ExistingChillerInputs.objects.filter(meta__run_uuid=run_uuid).update(**inputs_to_update["ExistingChiller"])
         if inputs_to_update["ASHPSpaceHeater"]:
+            prune_update_fields(ASHPSpaceHeaterInputs, inputs_to_update["ASHPSpaceHeater"])
             ASHPSpaceHeaterInputs.objects.filter(meta__run_uuid=run_uuid).update(**inputs_to_update["ASHPSpaceHeater"])
         if inputs_to_update["ASHPWaterHeater"]:
+            prune_update_fields(ASHPWaterHeaterInputs, inputs_to_update["ASHPWaterHeater"])
             ASHPWaterHeaterInputs.objects.filter(meta__run_uuid=run_uuid).update(**inputs_to_update["ASHPWaterHeater"])
     except Exception as e:
         exc_type, exc_value, exc_traceback = sys.exc_info()
@@ -152,3 +154,13 @@ def update_inputs_in_database(inputs_to_update: dict, run_uuid: str) -> None:
                                                                         tb.format_tb(exc_traceback)
                                                                     )
         log.debug(debug_msg)
+
+def prune_update_fields(model_obj, dict_to_update):
+    """
+    REopt.jl may return more fields than the API has to update, so prune those extra ones before updating the model/db object
+    """
+    field_names = [field.name for field in model_obj._meta.get_fields()]
+    dict_to_update_keys = list(dict_to_update.keys())
+    for key in dict_to_update_keys:
+        if key not in field_names:
+            del dict_to_update[key]
\ No newline at end of file
diff --git a/reoptjl/test/posts/ashp_defaults_update.json b/reoptjl/test/posts/ashp_defaults_update.json
new file mode 100644
index 000000000..d3302c1d6
--- /dev/null
+++ b/reoptjl/test/posts/ashp_defaults_update.json
@@ -0,0 +1,51 @@
+{
+    "user_uuid": "1d2ef71e-fd93-4c4a-b5c3-1485a87f772e",
+    "webtool_uuid": "1ab7530f-74b8-4ea8-b8ed-f11bd953f61f",
+    "Settings": {
+        "optimality_tolerance": 0.001,
+        "solver_name": "HiGHS",
+        "off_grid_flag": false,
+        "include_climate_in_objective": false,
+        "include_health_in_objective": false
+    },
+    "Meta": {
+        "address": "San Francisco CA USA"
+    },
+    "Site": {
+        "latitude": 37.7749295,
+        "longitude": -122.4194155,
+        "include_exported_renewable_electricity_in_total": true,
+        "include_exported_elec_emissions_in_total": true,
+        "land_acres": 1000000.0,
+        "roof_squarefeet": 0
+    },
+    "ElectricLoad": {
+        "doe_reference_name": "Hospital"
+    },
+    "ElectricTariff": {
+        "blended_annual_energy_rate": 0.15,
+        "blended_annual_demand_rate": 0.0
+    },
+    "ElectricUtility": {
+        "cambium_location_type": "GEA Regions",
+        "cambium_metric_col": "lrmer_co2e",
+        "cambium_scenario": "Mid-case",
+        "cambium_grid_level": "enduse"
+    },
+    "SpaceHeatingLoad": {
+        "annual_mmbtu": 11570.916,
+        "doe_reference_name": "Hospital"
+    },
+    "DomesticHotWaterLoad": {
+        "annual_mmbtu": 671.405,
+        "doe_reference_name": "Hospital"
+    },
+    "ExistingBoiler": {
+        "fuel_type": "natural_gas",
+        "fuel_cost_per_mmbtu": 25.0
+    },
+    "ASHPSpaceHeater": {
+        "force_into_system": true,
+        "can_serve_cooling": false
+    }
+}
\ No newline at end of file
diff --git a/reoptjl/test/test_job_endpoint.py b/reoptjl/test/test_job_endpoint.py
index aebd2bf7a..579e16806 100644
--- a/reoptjl/test/test_job_endpoint.py
+++ b/reoptjl/test/test_job_endpoint.py
@@ -311,4 +311,19 @@ def test_centralghp(self):
         resp = self.api_client.get(f'/v3/job/{run_uuid}/results')
         r = json.loads(resp.content)
 
-        self.assertAlmostEqual(r["outputs"]["Financial"]["lifecycle_capital_costs"], 1046066.8, delta=1000)
\ No newline at end of file
+        self.assertAlmostEqual(r["outputs"]["Financial"]["lifecycle_capital_costs"], 1046066.8, delta=1000)
+
+    def test_ashp_defaults_update_from_julia(self):
+        # Test that the inputs_with_defaults_set_in_julia feature worked for ASHPSpaceHeater
+        post_file = os.path.join('reoptjl', 'test', 'posts', 'ashp_defaults_update.json')
+        post = json.load(open(post_file, 'r'))
+        resp = self.api_client.post('/stable/job/', format='json', data=post)
+        self.assertHttpCreated(resp)
+        r = json.loads(resp.content)
+        run_uuid = r.get('run_uuid')
+
+        resp = self.api_client.get(f'/stable/job/{run_uuid}/results')
+        r = json.loads(resp.content)
+        
+        self.assertEquals(r["inputs"]["ASHPSpaceHeater"]["om_cost_per_ton"], 0.0)
+        self.assertEquals(r["inputs"]["ASHPSpaceHeater"]["sizing_factor"], 1.1)        
\ No newline at end of file