1. What is a Solar System for House Calculator?

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

Purpose: It helps homeowners determine how large a solar system they need to offset their electricity consumption.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• Size — Solar system size in kilowatts (kW)
• Electricity Bill — Your monthly electricity cost in dollars
• Rate — Cost per kilowatt-hour in your area
• Peak Hours — Average daily peak sunlight hours at your location

Explanation: The formula converts your monthly electricity cost into the solar capacity needed to generate that amount of power.

3. Importance of Proper Solar Sizing

Details: Correct sizing ensures your solar system meets your energy needs without overpaying for unnecessary capacity.

4. Using the Calculator

Tips: Enter your monthly electricity bill, local electricity rate (default $0.12/kWh), 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: The equivalent number of hours per day when solar irradiance averages 1,000 watts per square meter.

Q2: How do I find my local peak sun hours?
A: Check solar maps or contact local solar installers for your area's average.

Q3: Does this include system inefficiencies?
A: No, consider adding 10-20% to the calculated size to account for real-world losses.

Q4: What if my electricity rate varies?
A: Use your average rate or the rate from your most recent bill.

Q5: Does this account for seasonal variations?
A: No, it provides an average estimate. For year-round coverage, size for your highest-usage season.