1. What is a Solar Sun Hours Calculator?

Definition: This calculator estimates the Peak Sun Hours (PSH) based on the total solar insolation received at a location.

Purpose: It helps solar energy system designers and enthusiasts determine the equivalent hours of peak sunlight available for solar power generation.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( PSH \) — Peak Sun Hours (hours)
• \( Total\ Insolation \) — Total solar radiation received (Wh/m²/day)

Explanation: The total solar energy is divided by 1000 W/m² (standard solar irradiance) to convert it into equivalent peak sun hours.

3. Importance of Peak Sun Hours Calculation

Details: Accurate PSH estimation is crucial for sizing solar power systems, predicting energy output, and optimizing system performance.

4. Using the Calculator

Tips: Enter the total solar insolation value in Wh/m²/day (available from solar maps or weather stations). Value must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is considered a good PSH value?
A: Values above 4 PSH are considered good, while values below 3 PSH indicate lower solar potential.

Q2: Where can I find insolation data for my location?
A: Use NASA's SSE database, PVWatts calculator, or local meteorological data sources.

Q3: Why divide by 1000?
A: 1000 W/m² is the standard test condition for solar panels, representing peak sunlight intensity.

Q4: Does this account for seasonal variations?
A: No, use monthly insolation data for seasonal analysis or annual average for yearly estimates.

Q5: How does PSH relate to solar panel output?
A: Multiply PSH by panel wattage to estimate daily energy production (e.g., 5 PSH × 300W panel = 1500Wh/day).