1. What is a Solar Panel kWh Calculator?

Definition: This calculator estimates the daily energy production of a solar panel system based on its size and peak sun hours.

Purpose: It helps homeowners and solar professionals determine how much electricity a solar system will generate.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( \text{kWh} \) — Energy production (kilowatt-hours per day)
• \( \text{Size} \) — Solar system size (kilowatts)
• \( \text{Peak Hours} \) — Equivalent hours of full sun per day

Explanation: The system size is multiplied by peak sun hours to estimate daily energy production.

3. Importance of Solar Energy Calculation

Details: Accurate energy production estimates help with system sizing, financial analysis, and energy savings projections.

4. Using the Calculator

Tips: Enter the system size in kW and peak sun hours (default 4.5 hours). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What are peak sun hours?
A: Peak sun hours represent the equivalent number of hours per day when solar irradiance averages 1,000 W/m².

Q2: What's a typical peak sun hours value?
A: Most locations in the U.S. range between 3-6 peak sun hours per day, with 4.5 being a common average.

Q3: How do I find my system size?
A: System size is the rated capacity of your solar panels (e.g., 20 panels × 300W each = 6 kW system).

Q4: Does this account for system losses?
A: No, actual production will be about 10-20% less due to temperature, wiring, and inverter losses.

Q5: How can I estimate monthly production?
A: Multiply daily kWh by 30, or use monthly peak sun hour data for greater accuracy.