1. What is a Solar Calculator Online Estimate?

Definition: This calculator estimates the size of solar panel system needed based on your electricity bill, local rates, and sun exposure.

Purpose: It helps homeowners and businesses determine the appropriate solar system size to offset their electricity consumption.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• Estimate — Solar system size in kilowatts (kW)
• Home Bill — Monthly electricity bill in dollars
• Rate — Cost per kilowatt-hour ($/kWh)
• Peak Hours — Average daily peak sunlight hours

Explanation: The formula converts your monthly bill to kWh usage, then accounts for solar production based on local sun exposure.

3. Importance of Solar System Sizing

Details: Proper sizing ensures optimal energy production, maximizes return on investment, and meets your energy needs without over- or under-sizing.

4. Using the Calculator

Tips: Enter your monthly electricity bill in dollars, local electricity rate (default $0.12/kWh), and average daily peak sun hours (default 4.5 hours). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What are peak sun hours?
A: The equivalent number of hours per day when solar irradiance averages 1,000 W/m². This varies by location.

Q2: How accurate is this estimate?
A: It provides a rough estimate. Actual system size may vary based on roof orientation, shading, panel efficiency, and other factors.

Q3: What's a typical electricity rate?
A: U.S. average is $0.12-$0.15/kWh, but check your utility bill for exact rates.

Q4: Should I size for 100% of my bill?
A: Most homeowners size for 70-90% offset to optimize cost-effectiveness.

Q5: Does this include battery storage?
A: No, this calculates grid-tied system size only. Battery systems require additional capacity.