Create app.py

app.py

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+# Install required libraries
+# !pip install streamlit
+
+import streamlit as st
+import numpy as np
+
+# Constants
+SOLAR_PANEL_WATTAGE = 600  # Mono-facial solar panel rating in Watts
+INVERTER_EXTRA_FACTOR = 1.3
+
+def calculate_solar_system(load_watts, battery_ah_rating, battery_voltage, backup_hours):
+    # Calculate the number of solar panels
+    num_solar_panels = np.ceil(load_watts / SOLAR_PANEL_WATTAGE)
+    
+    # Calculate inverter capacity
+    inverter_capacity = load_watts * INVERTER_EXTRA_FACTOR
+
+    # Battery calculations
+    total_watt_hours_per_battery = battery_voltage * battery_ah_rating
+    backup_time_per_battery = total_watt_hours_per_battery / load_watts
+    num_batteries = np.ceil(backup_hours / backup_time_per_battery)
+
+    return {
+        "num_solar_panels": int(num_solar_panels),
+        "inverter_capacity": round(inverter_capacity, 2),
+        "num_batteries": int(num_batteries),
+    }
+
+# Streamlit app
+st.title("Solar System Sizing Calculator")
+st.header("Enter Your System Details")
+
+# User inputs
+load_watts = st.number_input("Enter total load in watts:", min_value=1, step=1, value=1000)
+battery_ah_rating = st.number_input("Enter battery ampere-hours (Ah) rating:", min_value=1, step=1, value=200)
+battery_voltage = st.selectbox("Select battery system voltage (V):", [12, 24, 48], index=1)
+backup_hours = st.number_input("Enter desired backup time in hours:", min_value=1, step=1, value=4)
+
+# Calculate and display results
+if st.button("Calculate Solar Sizing"):
+    result = calculate_solar_system(load_watts, battery_ah_rating, battery_voltage, backup_hours)
+
+    st.subheader("Sizing Results")
+    st.write(f"**Number of Solar Panels (600W each):** {result['num_solar_panels']}")
+    st.write(f"**Inverter Capacity (W):** {result['inverter_capacity']}")
+    st.write(f"**Number of Batteries:** {result['num_batteries']}")
+st.caption("Designed for solar sizing in regions with seasonal sunlight variations.")