Solar Power Calculator

How Much Solar Power Do You Need?

Have you ever wondered exactly how much solar power you need to offset your electric bill? Use our solar power calculator below to get a better idea of what kind of solar energy system would suit your needs the best!

Please note that this is just a rough estimate. The exact type of solar array and system wattage you will need will vary based on a whole host of other factors such as your roof pitch, shading, property location and orientation, incentives and rebates, and more.

To get exact pricing for your property in New Hampshire from one of our expert team members, contact us today to schedule your FREE inspection!

*Disclaimer: This is a generic estimate that doesn’t take more complex factors into account. For a more accurate solar estimate book a consultation with our team today.

Solar Power Calculator

Interested in Getting Solar for Your Property in New Hampshire? Let's Talk!

Solar Power Calculator: Factors That Affect Cost

Site Orientation

Your roof’s pitch, orientation to the sun, and level of shading all affect the size and complexity of your system and installation. When you’re using the residential solar power calculator, keep in mind that you won’t know how much solar you need until a professional takes a look at your property.

Labor & Design

With a more complicated installation, your costs may go up. This is because you may incur more costs for labor, design, and materials. Local labor costs are another factor that depends on your specific region.

Tax Incentives, Financing

You may opt for financing, which affects the cost of your solar panels as well. In addition, tax incentives like the federal solar tax credit greatly affect the upfront cost of installation in a positive way. Currently, you can get 30% of your installation cost back if you install between 2022-2032.

The System You Choose

You’ll need a corresponding solar energy system depending on your power needs. This affects the size and efficiency of the system you’ll want or need and the cost significantly. The price also depends on the brand and quality of panels you end up with.

"How Much Solar Do I Need" Calculator FAQs

When you use our solar array calculator, feel free to play around with different bill offset percentages. This way, you’ll be able to see different potential sizes of solar energy systems.

It’s not always possible to completely offset your bills due to different home orientations, shading levels, power needs, and more. To fully determine what level of energy savings you might realistically see, take the next step and chat with us today.

To offset your bill by 150% means you offset your bill and then some- you’re producing more energy than you’re using. People who do this in tandem with a net metering program sell their excess energy to the grid and receive credits to further offset their future bills. More energy savings all around!

Whether or not this is possible greatly depends on your home’s orientation and your panel size and efficiency. Get in touch with us to learn more!

So you’ve got your New Hampshire solar calculator result- now what?

Your solar roof calculator result is meant to roughly guide you towards a clearer answer of how much solar you’ll need to power your home. The calculator is meant to help you gain some perspective on what a realistic size system might be for you.

When you’re ready to start on the path to clean solar energy for your home, fill out our contact form above for a more in-depth, free estimate and solar consultation. We at Energy Shield will provide you with more information and help you make your bill-offsetting goals a reality!

Solar Installation: Our Process


You can use our solar calculator to see what size system could be appropriate for you before digging in. Following that, we provide a no-cost consultation to discuss your interest in solar panels. Our professionals will meet with you to discuss your solar roofing objectives at the start. The next step will be a site evaluation, during which we’ll take measurements, analyze the shade, and assess your electrical systems.


The next step is designing the optimal solar energy system for your home. We’ll put together a tailored plan for you that covers the system’s parts and design, projected energy output, and a complete financial breakdown that takes into account incentives and your long-term return on investment.


We’ll complete the design of your solar roofing system, arrange for the necessary town/city permits, submit the utility hookup paperwork, and then schedule and install your solar system. Typically, this entire process takes 30 to 60 days.


When the work is finished, we’ll give it a close inspection to make sure it lives up to our high standards. Once everything is finished and turned on, a special app will let you keep an eye on your systems in real-time.

The Energy Shield Advantage

Whatever the size or scope of your solar, roofing, or electrical project, our qualified and experienced team will make every effort to ensure its longevity. We will provide a free inspection and estimate with no hidden costs. When it comes time to do maintenance on your solar panels, we will provide you with great customer service and use the best materials to get the job done. To schedule a FREE solar consultation, get in touch with us right away!