Residential Solar Calculator

Plan Your Solar Future with Precision

Welcome to Sun Supply PV’s Residential Solar Calculator—your first step toward energy independence. Whether you’re tired of rising utility bills or eager to reduce your carbon footprint, this tool empowers you to design a solar system tailored to your home’s unique needs. Let’s explore why this calculator is a must-use and how it helps determine the perfect number of solar panels for you.

Why Should I Use This?

Switching to solar is a big decision, and getting it right matters. Our calculator takes the guesswork out of the process by analyzing your monthly electricity usage (kWh), bill amount, desired solar coverage, and local sun hours. Unlike generic online tools, it provides a personalized estimate of the system size (in kilowatts) you’ll need, translating raw data into actionable insights. You’ll discover not just how much power you can generate, but also how much you could save—making it easier to justify the investment. Plus, it’s built by Sun Supply PV, a trusted wholesale solar distributor, so you’re starting with expertise you can rely on.

How Many Solar Panels Do I Need?

Once you input your details, the calculator estimates your required system size based on your kWh usage and sun hours. For example, if you use 900 kWh monthly and aim to cover 100% with 5 peak sun hours, you might need a 6 kW system. Most residential solar panels range from 300–400 watts, so a 6 kW system could mean 15–20 panels. The exact number depends on your location and panel efficiency—our tool crunches these numbers for you, delivering a clear starting point. After calculating, explore our best-selling panels below to find the perfect fit.

Frequently Asked Questions

Q: Can I trust the results? Yes! Our calculator uses real-world variables like your local sun hours and usage patterns for accuracy—though a professional site assessment is recommended for final planning.

Q: What if I only want partial solar coverage? Adjust the percentage field! Covering 50% of your usage halves the system size, making solar affordable on any budget.

Q: How do sun hours affect my system? More sun hours mean fewer panels to achieve the same output. In sunny regions (e.g., 6 hours), you’ll need less than in cloudier areas (e.g., 4 hours).