1. What is the Solar System Size Calculator?

The Solar System Size Calculator helps determine the appropriate solar panel system size (in kilowatts) needed for new construction projects based on estimated energy consumption, available sunlight hours, and system efficiency.

2. How Does the Calculator Work?

The calculator uses the solar system size formula:

Where:

• \( Estimated\ kWh \) — Estimated kilowatt-hours of energy consumption
• \( Hours\ of\ Sun \) — Annual hours of sunlight available
• \( Efficiency \) — System efficiency as a decimal (e.g., 0.85 for 85% efficiency)

Explanation: The equation calculates the required solar system size by dividing the estimated energy consumption by the product of available sunlight hours and system efficiency.

3. Importance of System Size Calculation

Details: Accurate system size calculation is crucial for optimizing solar energy production, ensuring adequate power supply, and maximizing return on investment for new construction projects.

4. Using the Calculator

Tips: Enter estimated kWh consumption, annual hours of sunlight available in your location, and system efficiency as a decimal. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: How do I estimate my kWh consumption?
A: Review past electricity bills or use energy consumption calculators based on your appliances and usage patterns.

Q2: Where can I find hours of sun data for my location?
A: Consult solar radiation maps or contact local meteorological departments for accurate sunlight hour data.

Q3: What is typical solar system efficiency?
A: Most grid-tied solar systems operate at 75-85% efficiency when accounting for inverter losses and other factors.

Q4: Should I consider future energy needs?
A: Yes, it's recommended to factor in potential future energy consumption increases when sizing your solar system.

Q5: Are there other factors to consider?
A: Yes, roof orientation, shading, panel technology, and local regulations should also be considered in system design.