1. What is a Sun Hours Calculator for Solar Panels?

Definition: This calculator estimates the equivalent peak sun hours (PSH) based on the total solar insolation received at a location.

Purpose: It helps solar energy system designers and homeowners determine the effective sunlight hours for solar panel performance calculations.

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 insolation is divided by 1000 W/m² (standard test condition for solar panels) to get equivalent peak sun hours.

3. Importance of Peak Sun Hours Calculation

Details: Accurate PSH calculation helps in sizing solar power systems correctly, estimating energy production, and optimizing panel placement.

4. Using the Calculator

Tips: Enter the total solar insolation value for your location (available from solar maps or weather stations). The value must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is considered a good PSH value?
A: Generally, 4-6 PSH is good, with values above 6 being excellent for solar energy production.

Q2: Where can I find insolation data for my area?
A: Check NASA's solar database, local weather stations, or solar potential maps from energy agencies.

Q3: Why divide by 1000?
A: Solar panels are rated at 1000 W/m² under standard test conditions, so this normalizes the calculation.

Q4: Does this account for seasonal variations?
A: No, use monthly average insolation values for more accurate seasonal calculations.

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).