1. What is a Solar Panel Power Calculator?

Definition: This calculator estimates the power output from solar panels based on panel area, efficiency, solar irradiation, and performance ratio.

Purpose: It helps homeowners, engineers, and solar installers determine potential power generation from solar panel systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P \) — Power output (watts)
• \( A \) — Solar panel area (square meters)
• \( r \) — Panel efficiency (decimal, 0-1)
• \( H \) — Solar irradiation (watts per square meter)
• \( PR \) — Performance ratio (decimal, 0-1)

Explanation: The formula multiplies panel area by its efficiency, then by available sunlight, and adjusts for real-world performance factors.

3. Importance of Solar Power Calculation

Details: Accurate power estimation helps in system sizing, energy production forecasting, and financial analysis of solar investments.

4. Using the Calculator

Tips: Enter panel area in m², efficiency (default 0.15 for 15%), irradiation (default 1000 W/m² for full sun), and performance ratio (default 0.75). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is solar panel efficiency?
A: It's the percentage of sunlight converted to electricity. Typical panels range from 15-22% efficiency.

Q2: What's standard solar irradiation?
A: 1000 W/m² is the standard test condition, but actual values vary by location and weather.

Q3: What affects performance ratio?
A: Factors like temperature, wiring losses, inverter efficiency, and soiling reduce performance.

Q4: How do I find my panel area?
A: Measure length × width of panels, or check manufacturer specifications.

Q5: Does this calculate daily energy production?
A: No, this gives instantaneous power. Multiply by peak sun hours for daily energy.