How many solar panels do I need to power my house?

If you've considered solar, you've probably wondered, "how many solar panels do I need to power my house?" And the answer is… it depends. The number of panels needed for your home may be completely different than the number needed for your neighbor's home, even if both homes are the same size. Let us explain.

Energy usage

To start calculating how many solar panels you need to power your house, we want to know how much energy you use annually. We do this by looking at your past electric bills. As a rule of thumb, the more energy you use, the more solar panels you will need installed. So even if two homes are the exact same size, the home with two residents and a $50 electric bill will probably require fewer panels than the home with four residents and a $300 electric bill.

Sun exposure 

We also consider sun exposure to calculate the number of solar panels you need. The number of sun hours your roof gets each day depends on your location, layout and orientation of your roof, and the time of year it is. It's likely that if you live in an area with a lot of sunshine, your roof probably gets enough sun each day that you only need a few solar panels for your home. On the other hand, if you live in an overcast climate, you may need more solar panels to generate the same amount of power.

how many solar panels to power house

Designing

Once we have a clear understanding of your energy usage and potential sun hours, our home solar sizing objective is to design a system that can meet your energy needs based on how you purchase power from your utility, how you want the system to look, and how much energy you want it to produce.

Of course, there are some constraints that can affect your system design. These may include:

When it comes to constraints, don't worry -- our team of experts can suggest solutions or alternatives for most of these issues. 

The best way to find out how many solar panels you need to power your house is with a free consultation. To get started, call us or fill out a quick form. We'll look at your energy usage and sun exposure to give you an estimate, free of charge.

How to Go Solar

Vivint Solar makes renewable energy a simple and affordable alternative. We take care of everything from solar system design, to paperwork and permitting, to installation and maintenance.

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