1. What is a Solar Power Generation Calculator?

Definition: This calculator estimates the annual electricity generation of a solar PV system based on its size, local solar insolation, and system efficiency.

Purpose: It helps homeowners, businesses, and solar installers estimate potential solar energy production and system performance.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( G \) — Annual generation (kWh/year)
• \( S \) — System size (kW)
• \( I \) — Solar insolation (kWh/m² day)
• \( E \) — System efficiency (dimensionless, 0-1)
• \( 365 \) — Days per year

Explanation: The system size is multiplied by daily solar input and efficiency, then scaled to annual production.

3. Importance of Solar Generation Calculation

Details: Accurate generation estimates are crucial for system sizing, financial analysis, and understanding solar investment returns.

4. Using the Calculator

Tips: Enter the system size in kW, local solar insolation (default 4.5 kWh/m² day), and system efficiency (default 0.75). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is solar insolation?
A: The amount of solar radiation reaching a surface, typically measured in kWh per square meter per day.

Q2: How do I find my local solar insolation?
A: Use NASA's solar database or consult solar maps for your region (typically 3-6 kWh/m²/day).

Q3: What affects system efficiency?
A: Panel quality (15-22%), inverter efficiency (95-98%), temperature, shading, wiring losses, and soiling.

Q4: Should I use peak or average insolation?
A: Use annual average values for yearly production estimates.

Q5: Does this account for seasonal variations?
A: No, this gives annual average. For monthly breakdowns, use more detailed tools.