How Many Solar Panels Do I Need for a 2200 sq ft House?

On average, 28 to 32 solar panels are needed to power a home and cover 100% of the energy costs of a 2,500 square foot house. The exact number of panels you'll need will depend on the size of the house, the location of the panels, the geographical location, and the efficiency of the panels. Generally, a solar installation requires between 280 and 351 square feet of roof space. To calculate how much roof space your solar system needs, simply multiply the number of panels you need by 17.55 square feet, which is the area of most residential solar panels sold today.

When it comes to determining the number of solar panels needed for a home or building, size is not the only factor to consider. The amount of electricity consumed by a house with two people living in it is likely to be much less than that consumed by a house with two adults and two teenage children. Therefore, even if the size of the house is the same, a larger system will be required for a house with four people. The amount of direct sunlight your roof receives will also vary depending on where you live and the time of year.

Fortunately, there are tools like the U. S. NREL state solar resource map and extensive data from local weather stations, as well as other software to help calculate the amount of sunlight in your region. States in the Mid-Atlantic region have an average of 4.7 hours of peak sunshine each day.

Cheap solar panels can save you money, but they'll generate less electricity per panel. The least efficient panels on the market have a power of around 300 watts. That means that an average 2,500 square foot home using 1,023 kWh per month would need 26 to 40 inexpensive solar panels to supply all its electricity needs. The next step is to evaluate different options for solar kits and energy systems.

You can calculate how many solar panels you need with the three entries above, but if you go deeper, there are many more factors at play in determining the ideal size of your solar panel system. This table shows how much electricity an average household consumes in each region and how many solar panels in that climate are needed to generate that amount of electricity. You can calculate how many solar panels you have by dividing your annual electricity consumption by the production rate in your area and then dividing that number by the power output of your solar panels. While certain panels will have higher efficiency rates than others, investing in top-of-the-line solar equipment doesn't always result in greater savings on utility bills.

Solar panel systems in California are smaller than solar panel systems in Massachusetts, but they can produce the same amount of energy because they are exposed to more hours of sunlight each year. Installation costs have fallen more than 70% in the past ten years according to the Solar Energy Industries Association. Using their calculator only takes a minute, but if you simply want to know how many solar panels are needed to power a 2,500-square-foot home based on average electricity use across the country, it's 20 to 24 solar panels to cover 100 percent of its electricity consumption. Production rates vary by geographical location and a lower production ratio (due to lower amount of sunlight) means you'll need more solar panels to get the amount of energy production you need.

Also known as nominal power, panel power is the production of electricity from a specific solar panel under ideal conditions. If your home is small or has an unusually shaped roof, it can be very important to consider the size of the solar panels when calculating how many you need for your home or building.