diff --git a/examples/example.py b/examples/example.py
index ab0687cf..d52fe0fb 100644
--- a/examples/example.py
+++ b/examples/example.py
@@ -8,10 +8,10 @@ def main():
     site = PVSite(latitude=51.75, longitude=-1.25, capacity_kwp=1.25)
 
     # run model
-    predications_df = run_forecast(site=site, ts='2023-10-30')
+    predictions_df = run_forecast(site=site, ts="2023-10-30")
 
-    print(predications_df)
-    print(f"Max: {predications_df['power_wh'].max()}")
+    print(predictions_df)
+    print(f"Max: {predictions_df['power_wh'].max()}")
 
 
 if __name__ == "__main__":
diff --git a/quartz_solar_forecast/data.py b/quartz_solar_forecast/data.py
index 86919b64..4a368a3c 100644
--- a/quartz_solar_forecast/data.py
+++ b/quartz_solar_forecast/data.py
@@ -125,7 +125,6 @@ def make_pv_data(site: PVSite, ts) -> xr.Dataset:
     timestamp = [ts]
     pv_id = [1]
 
-    # would be nice to not use ss_id, should be pv_id
     da = xr.DataArray(
         data=generation_wh,
         dims=["pv_id", "timestamp"],
@@ -135,8 +134,8 @@ def make_pv_data(site: PVSite, ts) -> xr.Dataset:
             timestamp=timestamp,
             pv_id=pv_id,
             kwp=(["pv_id"], [site.capacity_kwp]),
-            tilt=(["pv_id"], [0]),
-            orientation=(["pv_id"], [0]),
+            tilt=(["pv_id"], [site.tilt]),
+            orientation=(["pv_id"], [site.orientation]),
         ),
     )
     da = da.to_dataset(name="generation_wh")
diff --git a/quartz_solar_forecast/pydantic_models.py b/quartz_solar_forecast/pydantic_models.py
index 83e5d76a..4e626bfb 100644
--- a/quartz_solar_forecast/pydantic_models.py
+++ b/quartz_solar_forecast/pydantic_models.py
@@ -2,7 +2,18 @@
 
 
 class PVSite(BaseModel):
-
     latitude: float = Field(..., description="the latitude of the site", ge=-90, le=90)
     longitude: float = Field(..., description="the longitude of the site", ge=-180, le=180)
     capacity_kwp: float = Field(..., description="the capacity [kwp] of the site", ge=0)
+    tilt: float = Field(
+        default=35,
+        description="the tilt of the site [degrees], the panels' angle relative to horizontal ground",
+        ge=0,
+        le=90,
+    )
+    orientation: float = Field(
+        default=180,
+        description="the orientation of the site [degrees], the angle between north and the direction the panels face, measured on the horizontal plane.",
+        ge=0,
+        le=360,
+    )