diff --git a/.idea/Model.iml b/.idea/Model.iml
index 4413bb06..b0f9c00d 100644
--- a/.idea/Model.iml
+++ b/.idea/Model.iml
@@ -7,7 +7,7 @@
       <sourceFolder url="file://$MODULE_DIR$/open_uprn" isTestSource="false" />
       <sourceFolder url="file://$MODULE_DIR$/recommendations" isTestSource="false" />
     </content>
-    <orderEntry type="jdk" jdkName="Python 3.10 (backend)" jdkType="Python SDK" />
+    <orderEntry type="jdk" jdkName="Python 3.10 (model_data)" jdkType="Python SDK" />
     <orderEntry type="sourceFolder" forTests="false" />
   </component>
   <component name="PyNamespacePackagesService">
diff --git a/.idea/misc.xml b/.idea/misc.xml
index 6f308057..1122b380 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -3,7 +3,7 @@
   <component name="Black">
     <option name="sdkName" value="Python 3.10 (backend)" />
   </component>
-  <component name="ProjectRootManager" version="2" project-jdk-name="Python 3.10 (backend)" project-jdk-type="Python SDK" />
+  <component name="ProjectRootManager" version="2" project-jdk-name="Python 3.10 (model_data)" project-jdk-type="Python SDK" />
   <component name="PythonCompatibilityInspectionAdvertiser">
     <option name="version" value="3" />
   </component>
diff --git a/backend/tests/test_annual_bill_savings.py b/backend/tests/test_annual_bill_savings.py
new file mode 100644
index 00000000..81c2898c
--- /dev/null
+++ b/backend/tests/test_annual_bill_savings.py
@@ -0,0 +1,82 @@
+import numpy as np
+import pytest
+from backend.ml_models.AnnualBillSavings import AnnualBillSavings
+
+appliance_consumption_cases = [
+    {
+        "total_floor_area": 13.9,
+        "n_occupants": 1,
+        "consumption": 718.4795859263703
+    },
+    {
+        "total_floor_area": 20,
+        "n_occupants": 1.0306381042556767,
+        "consumption": 865.2316409517844
+    },
+    {
+        "total_floor_area": 30,
+        "n_occupants": 1.1731577598127325,
+        "consumption": 1113.5965321501362
+    },
+    {
+        "total_floor_area": 50,
+        "n_occupants": 1.6901008890848956,
+        "consumption": 1683.31305074609
+    },
+    {
+        "total_floor_area": 75,
+        "n_occupants": 2.361158387531988,
+        "consumption": 2386.2935599981865
+    },
+    {
+        "total_floor_area": 100,
+        "n_occupants": 2.739525875076067,
+        "consumption": 2931.6076153011486
+    },
+    {
+        "total_floor_area": 125,
+        "n_occupants": 2.8807344137165405,
+        "consumption": 3335.143110751552
+    },
+    {
+        "total_floor_area": 150,
+        "n_occupants": 2.934188599837662,
+        "consumption": 3666.3228057866513
+    },
+    {
+        "total_floor_area": 200,
+        "n_occupants": 3.001920087128373,
+        "consumption": 4244.625403339813
+    },
+    {
+        "total_floor_area": 300,
+        "n_occupants": 3.1319299999993095,
+        "consumption": 5243.086106676302
+    },
+    {
+        "total_floor_area": 500,
+        "n_occupants": 3.39193,
+        "consumption": 6927.400500420533
+    },
+    {
+        "total_floor_area": 1000,
+        "n_occupants": 4.04193,
+        "consumption": 10434.755635642652
+    }
+]
+
+
+class TestAnnualBillSavings:
+
+    @pytest.mark.parametrize(
+        "test_case",
+        appliance_consumption_cases
+    )
+    def test_appliance_estimation(self, test_case):
+        n_occupants = AnnualBillSavings.calculate_occupants(test_case["total_floor_area"])
+        assert np.isclose(n_occupants, test_case["n_occupants"])
+
+        appliance_consumption = AnnualBillSavings.estimate_electrical_appliances(
+            n_occupants, test_case["total_floor_area"]
+        )
+        assert np.isclose(appliance_consumption, test_case["consumption"])
diff --git a/etl/customers/vander_elliot/non_intrusives.py b/etl/customers/vander_elliot/non_intrusives.py
new file mode 100644
index 00000000..e11bc3f8
--- /dev/null
+++ b/etl/customers/vander_elliot/non_intrusives.py
@@ -0,0 +1,17 @@
+from etl.non_intrusive_surveys.upload.UploadNonIntrusives import UploadNonIntrusives
+
+
+def app():
+    """
+    This script handles the creation of the portfolio for the non-intrusive surveys
+    :return:
+    """
+
+    non_intrusive_s3_filename = (
+        "customers/Vander Elliot/Non-intrusive survey template V2 - Amazon Management Services.xlsx"
+    )
+
+    non_intrusive = UploadNonIntrusives(
+        s3_template_location=non_intrusive_s3_filename,
+        s3_bucket="retrofit-datalake-dev",
+    )
diff --git a/etl/non_intrusive_surveys/photos/README.md b/etl/non_intrusive_surveys/photos/README.md
index 9dbe951f..a58603b4 100644
--- a/etl/non_intrusive_surveys/photos/README.md
+++ b/etl/non_intrusive_surveys/photos/README.md
@@ -15,5 +15,5 @@ pip install -r requirements.txt
 The main application is found in the app.py file. To run the application, use the following command:
 
 ```bash
-python app.py
+python UploadNonIntrusives.py
 ```
\ No newline at end of file
diff --git a/etl/non_intrusive_surveys/upload/UploadNonIntrusives.py b/etl/non_intrusive_surveys/upload/UploadNonIntrusives.py
new file mode 100644
index 00000000..00f707e9
--- /dev/null
+++ b/etl/non_intrusive_surveys/upload/UploadNonIntrusives.py
@@ -0,0 +1,18 @@
+from utils.s3 import read_excel_from_s3
+
+
+class UploadNonIntrusives:
+    """
+    This class handles the upload of findings from the non-intrusive surveys, to the database
+    """
+
+    def __init__(self, s3_template_location, s3_bucket):
+        self.s3_template_location = s3_template_location
+        self.s3_bucket = s3_bucket
+        self.template = self.read_template()
+
+    def read_template(self):
+        """
+        This method reads the template from S3
+        """
+        return read_excel_from_s3(file_key=self.s3_template_location, bucket_name=self.s3_bucket, header_row=0)
diff --git a/etl/non_intrusive_surveys/upload/__init__.py b/etl/non_intrusive_surveys/upload/__init__.py
new file mode 100644
index 00000000..e69de29b