1. What is a Solar Panel Size Calculator?

Definition: This calculator estimates the required solar panel system size based on your daily energy consumption and local peak sun hours.

Purpose: It helps homeowners and businesses determine the appropriate solar panel capacity needed to meet their energy requirements.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( \text{Size} \) — Solar panel system size (kilowatts)
• \( \text{Daily kWh} \) — Your average daily energy consumption (kilowatt-hours)
• \( \text{Peak Hours} \) — Average daily peak sunlight hours in your location

Explanation: The daily energy requirement is divided by the peak sun hours to determine the solar panel capacity needed to generate that amount of energy.

3. Importance of Solar Panel Sizing

Details: Proper sizing ensures your solar system meets your energy needs, maximizes return on investment, and complies with local regulations.

4. Using the Calculator

Tips: Enter your average daily kWh usage (from your electricity bill) and your location's peak sun hours (default 4.5 hours). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: How do I find my daily kWh usage?
A: Check your electricity bill for monthly kWh usage and divide by 30 for a daily average.

Q2: What are typical peak sun hours?
A: Most locations get 3-6 peak sun hours daily. Southern areas typically get more than northern regions.

Q3: Does this account for system inefficiencies?
A: No, consider adding 10-20% to the calculated size to account for real-world conditions.

Q4: How does panel orientation affect this calculation?
A: South-facing panels (in northern hemisphere) at optimal tilt will perform closest to these calculations.

Q5: Should I consider battery storage?
A: This calculation is for grid-tied systems. Add battery storage if you need backup power.