1. What is a Solar Energy Calculator?

Definition: This calculator estimates the daily energy production of solar panels based on the number of panels, their wattage, and daily sunlight hours.

Purpose: It helps homeowners and solar installers estimate potential energy generation from solar panel systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( E \) — Energy production (kilowatt-hours)
• \( P \) — Number of solar panels
• \( W \) — Wattage of each panel (watts)
• \( H \) — Daily sunlight hours

Explanation: The formula multiplies panel count by their wattage and sun hours, then divides by 1000 to convert to kWh.

3. Importance of Solar Energy Calculation

Details: Accurate energy estimates help size solar systems properly, calculate return on investment, and meet energy needs.

4. Using the Calculator

Tips: Enter the number of panels, their wattage (default 300W), and average daily sun hours (default 5h). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical panel wattage?
A: Most residential panels range from 250-400 watts, with 300W being common for standard installations.

Q2: How do I determine daily sun hours?
A: Check solar insolation maps for your location or use historical weather data (average 4-6 hours in most areas).

Q3: Does this account for system losses?
A: No, actual production may be 10-25% less due to inverter efficiency, temperature, and other factors.

Q4: How many panels do I need for my home?
A: First calculate your daily kWh usage, then divide by the daily production of one panel (wattage × sun hours ÷ 1000).

Q5: What's the difference between kW and kWh?
A: kW is power capacity (how much energy can be produced at once), kWh is energy production over time.