1. What is a Solar Energy Calculator for Home?

Definition: This calculator estimates the annual energy production of a solar panel system based on its size and local sunlight conditions.

Purpose: It helps homeowners and solar installers predict energy generation for planning and return-on-investment calculations.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Energy \) — Annual energy production (kWh/year)
• \( Size \) — Solar system size (kW)
• \( Peak\ Hours \) — Average daily peak sun hours (h)

Explanation: The system size is multiplied by daily peak sun hours and then by 365 days to get annual production.

3. Importance of Solar Energy Calculation

Details: Accurate energy estimation helps determine system sizing, financial returns, and environmental impact of solar installations.

4. Using the Calculator

Tips: Enter the system size in kW and average peak sun hours (default 4.5 h). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What are peak sun hours?
A: The equivalent number of hours per day when solar irradiance averages 1,000 W/m². This accounts for varying sunlight intensity throughout the day.

Q2: How do I find my peak sun hours?
A: Check solar maps for your location or consult local solar installers. Typical values range from 3-6 hours daily.

Q3: Does this account for system losses?
A: No, this is theoretical maximum. Real-world systems typically produce 75-85% of this value due to various inefficiencies.

Q4: What's a typical residential system size?
A: Most home systems range between 3-10 kW, depending on energy needs and roof space.

Q5: How does this relate to my electricity bill?
A: Compare the calculated kWh/year with your annual electricity consumption to estimate how much solar can offset your bills.