1. What is a Solar Power System Size Calculator?

Definition: This calculator estimates the size of a solar power system needed based on your daily energy consumption and local peak sun hours.

Purpose: It helps homeowners and businesses determine the appropriate solar panel system size for their energy needs.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The daily energy requirement is divided by peak sun hours to determine the system size needed to generate that energy.

3. Importance of System Size Calculation

Details: Proper sizing ensures your solar system meets your energy needs while optimizing cost and efficiency.

4. Using the Calculator

Tips: Enter your average daily kWh usage and local 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 days.

Q2: What are peak sun hours?
A: The equivalent number of hours per day when solar irradiance averages 1,000 W/m². Varies by location.

Q3: Should I add a buffer to the calculated size?
A: Yes, consider adding 10-20% to account for system inefficiencies and future energy needs.

Q4: Does this account for battery storage?
A: No, this calculates grid-tied system size. For off-grid systems, you'll need additional calculations.

Q5: How does panel efficiency factor in?
A: This calculation assumes standard efficiency. Higher efficiency panels would require slightly less area.