1. What is a Solar Panel Unit Generation Calculator?

Definition: This calculator estimates the energy output (in kWh) of solar panels based on their power rating, sunlight exposure, and system efficiency.

Purpose: It helps homeowners and solar installers predict energy production for sizing solar systems and estimating savings.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( E \) — Energy generated (kWh)
• \( P \) — Panel power rating (kW)
• \( H \) — Daily sunlight hours (hours)
• \( \eta \) — System efficiency (0-1)

Explanation: The panel's rated power is multiplied by sunlight hours and system efficiency to account for real-world losses.

3. Importance of Solar Energy Calculation

Details: Accurate energy production estimates are crucial for system sizing, ROI calculations, and energy planning.

4. Using the Calculator

Tips: Enter panel power in kW, average daily sunlight hours (default 4.5), and system efficiency (default 0.75). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical system efficiency value?
A: Most residential systems have 70-80% efficiency (0.7-0.8) accounting for inverter losses, wiring, temperature, and dirt.

Q2: How do I find my sunlight hours?
A: Use solar maps or local weather data. The default 4.5 hours represents a typical US average.

Q3: Should I use panel kW or W?
A: This calculator uses kW (1 kW = 1000 W). Convert W to kW by dividing by 1000.

Q4: Is this daily or annual production?
A: This calculates daily kWh. Multiply by 365 for annual estimate.

Q5: Does this include seasonal variations?
A: No, use average values or calculate separately for different seasons.