How Many Solar Panels For A 1800 Sq Ft House?

People frequently inquire about the number of solar panels they will require dependent on the size of their property. However, for solar electric system design, the amount of electricity you use is more significant than the size of your home. This is primarily due to the wide range of ways in which people consume power.

Let’s imagine two family dwell in 2,000 square foot houses next door to each other. A young man and his fiance live in Home A; they both work long hours and frequently go out with friends in the evenings. As a result, they use very little electricity and only pay around $40 each month.

Two parents and their two teenage children live in Home B. They are either using power to filter their pool or operating the heater or air conditioner, while the teenagers are always on their iPads, opening the refrigerator, or watching TV. Because there are more people living in the residence and their lifestyle necessitates more energy, their monthly electricity expenses are around $325.

Despite the fact that they live in identical homes, the family in Home B would most likely need to invest in more solar panels to reduce their electricity consumption than the couple in Home A.

Even if the residences consumed the same amount of electricity, one may have better solar exposure or less shade than the other, resulting in more or less panels.

The quantity of energy you use now is also significant because most utility companies in Los Angeles and Orange County limit the size of your solar system based on how much energy you use now. This figure is usually calculated by looking at how much electricity you used in the previous year.

There are, of course, certain exceptions to the rule. If you’ve just been in your home for a few months or want to put solar panels on a property that’s still being built, most utility companies will let us estimate your usage based on the square footage of your home.

The Los Angeles Department of Water and Power, for example, calculates this type of average as 2 watts per square foot. A 4,000-watt solar array would be authorized for a 2,000-square-foot residence. A system of this size could range from 12 to 18 solar panels, depending on the type of panel you choose. Keep in mind that the formula for estimating usage differs based on your electrical provider.

Another exception is sometimes allowed for persons who anticipate an increase in their electricity consumption. We can estimate the additional demand and put it into the solar panel design and cost if you plan to buy an EV (electric car) or install central air, for example. The utilities, on the other hand, are finicky! They’ll require proof of purchase in addition to the solar system application.

For a 1500 square foot house, how many solar panels do I need?

In the United States, the typical residence is 1500 square feet. The average electric expense for a home of this size is roughly $100 per month. It is predicted that 15-18 solar panels would be required to cover the home’s electrical needs.

A normal refrigerator, for example, may be rated at 250 watts and run for 4 hours every day. 250 watts multiplied by four equals 1000 watts. A kilowatt equals one kilowatt-hour of energy in a day.

This is, of course, a rough estimate, and the amount can vary depending on a variety of factors such as usage, sunlight hours, location, and panel type.

How many solar panels are required to power an entire home?

Solar panels are currently one of the more widely available kinds of renewable energy. People are drawn to solar energy for a variety of reasons, including considerable reductions in greenhouse gas emissions and an average increase in home value of $15,000. Solar panels mounted to the rooftops of both homes and businesses are becoming more widespread, with enough panels installed in Texas to power over 350,000 households.

This growth is also attributed to the decreasing cost of solar energy generation. Between 2014 and 2019, solar prices in Texas dropped by 34%. Solar panel installation costs in the United States plummeted by 70% from 2009 to 2019, which is much more significant over a longer time frame. As a result, demand for home solar panels, as well as solar electricity in general, has skyrocketed.

How Many Solar Panels Are Needed to Power My Home?

The average American household consumes 10,400 kWh of electricity each year. You’d need roughly 28-34 solar panels to generate enough energy to power your complete home if you installed the average 250-watt solar panel.

Solar panel installation, on the other hand, is a highly personalized process, which drives its price, unlike the typical utility grid, which is automatically connected to your home during building. To see if solar panels are a suitable fit for you, we recommend following these three steps:

  • Calculate your electricity usage in kWh. This information can be found on your electric bill, or you can estimate it here.
  • Subtract that amount from the estimated solar panel production. Depending on your area and property, the actual estimate will vary (e.g. tree coverage and regional sunshine). Using 1.31 (Arizona) and 1.61 (Maine), the highest and lowest production ratios in the US, as references, you can get a fair range.
  • Divide that figure by 250, the typical solar panel’s wattage, to get an estimate of how many solar panels you’ll need to provide 100% of your home’s electricity consumption.

Let’s have a look at some fundamental math:

  • Annual electricity usage of 11,000 kWh / 1.31 (since we live in Texas) = 8,396.9
  • The total number of panels is 8,396.9 / 250 = 33.5834.

While this estimate should not be used in place of a professional review, it can give you a good indication of whether solar panels are feasible for your home.

How Much Will It Cost to Install Solar Panels at My Home?

Despite the fact that installation costs are decreasing, the average installation will cost you upwards of $10,000, even after a 30% federal tax credit. For many people, the expense of installing solar panels to totally power their homes is prohibitive. That’s before you consider the fact that Texas Retail Electricity Providers produce electricity at a lower cost than their residential counterparts.

Solar panels will undoubtedly continue to decrease in price and increase in productive capacity in the future. However, the vast majority of homes who have solar panels do not use them as their sole source of energy. Instead, through a procedure known as net metering, they are connected to the electric grid (NEM). Net metering is a good alternative for folks who want to save money on their electric bill while also being more environmentally conscious.

This one-of-a-kind charging arrangement follows the following pattern:

  • The amount of electricity consumed by the family and the amount of electricity generated by the solar panels are both monitored by a household utility meter.
  • That household is solely liable for paying its net consumptionits power consumption beyond what was generated by the home’s solar panels on a monthly or yearly basis.
  • As a result, the most energy-conscious households may be eligible for compensation from their utility company.

This configuration, however, is quite uncommon. Though a self-sufficient, off-grid solar panel system remains a difficult task, there are other options to power your home with green energy.

Why are solar panels a waste of money?

Because solar panels cannot store electricity, their production will be reduced in overcast conditions and will be nil at night. As a result, most home solar systems necessitate the usage of a solar battery. When evaluating if solar panels are worth it for you, keep this additional expense in mind.

What is the average amount of electricity used in a 2000 square foot home?

“The average 2,000 sq. ft. U.S. home uses roughly 1,000 kWh of energy each month, or about 32 kWh per day,” according to Home Professionals. But, once again, the picture isn’t so clear. According to the US Energy Information Administration, the average household used 914 kWh of energy per month.


The cost of purchasing a solar system is relatively expensive at first. Solar panels, inverters, batteries, wiring, and installation are all included in this cost. Nonetheless, because solar technology is continually improving, it’s realistic to predict that prices will continue to fall in the future.


Although solar energy can be collected during overcast and rainy days, the solar system’s efficiency is reduced. Solar panels must be exposed to sunlight in order to collect solar energy. As a result, a couple of overcast, rainy days can have a significant impact on the energy system. It’s also important to remember that solar energy cannot be collected at night.

Thermodynamic panels, on the other hand, are an option to consider if you need your water heating solution to work at night or during the winter.

Check out our video for a breakdown of how effective solar panels are in the winter:

What is the amount of the solar tax credit in 2022?

Congress extended the ITC in December 2020, providing a 26 percent tax credit for systems installed in 2020-2022 and a 22 percent credit for systems installed in 2023. (A 30 percent tax credit was available for systems installed before December 31, 2019.) Unless Congress extends the tax credit, it will expire in 2024.

Is it possible to run a house solely on solar energy?

You can definitely run a whole house entirely on solar power with a contemporary solar energy system that includes power storage. With today’s high-efficiency solar panels and solar batteries, powering a full home solely with solar energy is now more affordable than ever.

Since the widespread use of solar energy for domestic and commercial purposes two decades ago, the cost of solar panel systems and installation has continued to fall. This is despite the fact that local and federal government rebates and tax credits, as well as utility company incentives, are all declining year after year. The significant reduction in solar costs is due in part to the widespread adoption of solar energy on a national and global scale, and in part to quick developments in solar energy system technology.

Start with these fundamental analyses to determine the cost-effectiveness and other viability elements of maintaining a totally solar-powered home:

Calculate how much electricity you use per month.

To begin, calculate how much solar energy you’ll need to power your complete home entirely using solar energy. You’ll need to know how much electricity you use on a monthly basis to do so. This will allow your solar contractor to estimate how much energy your panels will need to generate each month to power your entire home.

Of course, monthly usage and solar power production potential are projected to fluctuate throughout the year. The reserve capacity of today’s state-of-the-art domestic solar battery storage is the solution to maintaining a consistent power supply for your home. Your solar batteries allow you to store the excess electricity generated by your solar panels on longer, sunnier days for use at a later time when the weather is less sunny.

Solar batteries ensure you have enough electricity to run your complete home during periods of less direct, bright sunlight, without the system automatically drawing from the public power grid.

Evaluate your climate region’s solar energy production capacity.

Whether you can expect to generate enough solar energy to power your entire house year-round depends entirely on the environment you reside in. Examine whether the climate in your area has the ability to produce enough solar energy to power your entire home on a continual basis.

Running a house fully on solar throughout the winter months may be more difficult for homeowners in colder, cloudier climates, such as those along the northwest Pacific coast. Residents may go weeks without seeing direct sunlight, while residents in the southwest may go weeks without seeing a gloomy day.

These climatic changes, combined with circumstances unique to your home and lifestyle, can mean the difference between being able to operate fully off the grid or continuing to rely on your utility company for at least some electricity.

Assess your solar production environment based on your home’s surroundings.

Consider the number and location of huge trees growing around and near your property, as well as the heights of nearby houses and other structures. Large trees and tall homes that are close enough to your home to create heavy shade across your roof for more than a third of the bright hours might impair the efficiency of your solar energy system significantly.

To get off the grid, how big of a solar system do I need?

As you shop, you’ll see that panels and inverters are often available in 12, 24, or 48 volt configurations. Because most RVs and boats have 12V battery banks, 12V panels are commonly used. Many bigger household systems are now rated at 24v or 48v, whereas 12 volt systems were once the norm.

RVs/motorhomes/vans, camper trailers, and small cottages or tiny homes are all suitable candidates for 12v solar systems. Choose a 24 volt system if your energy needs are between 1,000 and 5,000 watts. If you need more than 3,000 watts of power, a 48 volt system is the way to go. 48 volt systems are commonly used in large off-grid homes.

Calculator, how big of a solar system do I need?

Minimum System Size: Subtract the Minimum System Size watts from the wattage of the solar panel you’re interested in. To generate 3000 watts, for example, 24 Mitsubishi 125-watt solar panels would be required. 3000 divided by 130 is a total of 23 solar panels.