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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.") |