Update app.py

app.py

@@ -1,44 +1,51 @@
 import streamlit as st
 
 # Function for calculations
-def calculate_solar_requirements(total_load, sun_hours, panel_wattage, efficiency_loss, battery_backup):
-    # Energy needs per day (in kWh)
-    daily_energy = total_load * efficiency_loss / 1000
+def calculate_solar_requirements(monthly_usage, roof_direction, inclination_angle, panel_efficiency, peak_factor):
+    # Constants
+    SUN_HOURS = 5  # Average daily sun hours (adjustable)
+    LOSS_FACTOR = 0.85  # 15% loss due to shading, weather, etc.
     
-    # Required solar generation (kW)
-    solar_capacity_needed = daily_energy / sun_hours
+    # Annual and daily energy calculations
+    annual_energy = monthly_usage * 12
+    daily_energy = annual_energy / 365
     
-    # Number of panels
-    num_panels = solar_capacity_needed * 1000 / panel_wattage
+    # Panel output adjustment based on direction and inclination
+    if roof_direction in ["south", "southeast", "southwest"]:
+        direction_factor = 1.0
+    else:
+        direction_factor = 0.8  # Example: less optimal directions
     
-    # Battery capacity (kWh)
-    battery_capacity = 0
-    if battery_backup > 0:
-        battery_capacity = daily_energy * battery_backup
+    inclination_factor = max(0.9 - abs(inclination_angle - 30) * 0.01, 0.5)  # Ideal angle ~30 degrees
     
-    return daily_energy, solar_capacity_needed, num_panels, battery_capacity
+    panel_output_per_day = SUN_HOURS * (panel_efficiency / 100) * LOSS_FACTOR * direction_factor * inclination_factor
+    
+    # Total panels required
+    num_panels = (daily_energy * peak_factor) / panel_output_per_day
+    
+    return annual_energy, daily_energy, panel_output_per_day, num_panels
 
 # Streamlit App
 st.title("Solar Panel Calculator")
 st.sidebar.header("User Input")
 
 # User Inputs
-total_load = st.sidebar.number_input("Total Load (W)", min_value=100, max_value=100000, value=5000)
-sun_hours = st.sidebar.number_input("Sun Hours (Hours/day)", min_value=1.0, max_value=12.0, value=5.0)
-panel_wattage = st.sidebar.number_input("Panel Wattage (W)", min_value=100, max_value=1000, value=300)
-efficiency_loss = st.sidebar.slider("Efficiency Loss (%)", min_value=0, max_value=30, value=15)
-battery_backup = st.sidebar.number_input("Battery Backup Hours (optional)", min_value=0, max_value=24, value=0)
+monthly_usage = st.sidebar.number_input("Average Monthly Usage (kWh)", min_value=100, max_value=5000, value=500)
+roof_direction = st.sidebar.selectbox("Roof Direction", ["south", "southeast", "southwest", "east", "west", "north"])
+inclination_angle = st.sidebar.number_input("Roof Inclination Angle (degrees)", min_value=0, max_value=90, value=30)
+panel_efficiency = st.sidebar.slider("Solar Panel Efficiency (%)", min_value=10, max_value=25, value=20)
+peak_factor = st.sidebar.slider("Peak Usage Factor (e.g., summer demand multiplier)", min_value=1.0, max_value=2.0, value=1.2)
 
 # Calculate
 if st.sidebar.button("Calculate"):
-    daily_energy, solar_capacity_needed, num_panels, battery_capacity = calculate_solar_requirements(
-        total_load, sun_hours, panel_wattage, efficiency_loss, battery_backup
+    annual_energy, daily_energy, panel_output_per_day, num_panels = calculate_solar_requirements(
+        monthly_usage, roof_direction, inclination_angle, panel_efficiency, peak_factor
     )
     
     # Display Results
     st.subheader("Results")
-    st.write(f"Daily Energy Consumption: {daily_energy:.2f} kWh")
-    st.write(f"Solar Capacity Needed: {solar_capacity_needed:.2f} kW")
-    st.write(f"Number of Panels Required: {num_panels:.0f}")
-    if battery_backup > 0:
-        st.write(f"Battery Capacity Required: {battery_capacity:.2f} kWh")
+    st.write(f"**Annual Energy Consumption:** {annual_energy:.2f} kWh")
+    st.write(f"**Daily Energy Requirement:** {daily_energy:.2f} kWh")
+    st.write(f"**Solar Panel Output (per panel/day):** {panel_output_per_day:.2f} kWh")
+    st.write(f"**Number of Panels Required:** {num_panels:.0f}")
+    st.write("Note: These estimates account for real-world losses and adjustments for roof orientation and angle.")