1. What is a Solar Panel Power Calculator?

Definition: This calculator estimates the total power output from solar panels based on the number of panels, their wattage, and system efficiency.

Purpose: It helps solar installers and homeowners determine the expected power generation from a solar panel array.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P \) — Total power output (watts)
• \( N \) — Number of solar panels
• \( W \) — Wattage of each panel (watts)
• \( E \) — System efficiency (0-1)

Explanation: The number of panels multiplied by their individual wattage gives theoretical maximum output, which is then adjusted by the system efficiency factor.

3. Importance of Solar Power Calculation

Details: Accurate power estimation ensures proper system sizing, meets energy needs, and helps evaluate return on investment for solar installations.

4. Using the Calculator

Tips: Enter the number of panels, each panel's wattage (typically 250-400W), and system efficiency (default 0.85). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What affects solar panel efficiency?
A: Factors include panel quality, temperature, shading, orientation, and inverter efficiency.

Q2: Why is system efficiency less than 1?
A: Real-world conditions like wiring losses, inverter efficiency, and environmental factors reduce output below theoretical maximum.

Q3: How do I find my panel's wattage?
A: Check the manufacturer's specifications - it's typically labeled as "rated power" or "Pmax" on the panel.

Q4: Should I use peak or average wattage?
A: Use the panel's rated (peak) wattage - this calculator already accounts for average conditions via the efficiency factor.

Q5: How can I estimate daily energy production?
A: Multiply the result by your location's average peak sun hours (typically 3-6 hours/day).