How much does a 7.5 kW solar system produce?

If we are to answer your question, how much does a 7.5 kW solar system produce? The short answer would be 7.5 kilowatts of energy at any given period of time. However, if you have installed a 7.5 kW solar system and it is not producing the same amount of energy it is supposed to, then know that there are various factors that can influence the energy production of your solar system. 

Generally speaking, if you are a resident of the United States and you have installed a solar system in your home then on average you can expect around 2 kilowatt-hours (kWh) of energy every day from a single solar panel. Furthermore, the 2 kilowatt-hours (kWh) will save you around $0.36 on electricity costs every day.

Although $0.36 may not seem like a lot of money, having multiple solar panels will offer you more savings (since a solar system does not generally consist of a single solar panel). On average, the American household saves almost $130 a month or more depending on the capacity of their solar system.

In this article, we will discuss how much does a 7.5 kW solar system produce and other associated details regarding the installation of a 7.5 kW solar system so that we have a complete understanding of what to expect from your solar system. 

What kind of power can a 7.5 kW solar system generate?

7.5 kW solar system can produce around 28 kWh to 38 kWh of energy every single day

In case you have conducted a little research on solar systems and solar panels then you must have come across the fact that your geographical location, the amount of sunlight you receive every day, etc. are the most important factors when it comes to the production of electricity through solar panels.  

For example, two friends from two different states namely Massachusetts and Arizona have decided to install solar panels. The energy output received by these two friends will be different and the person who is living in Arizona will be able to produce more solar energy than the person who is living in Massachusetts. 

However, this does not imply that you need to stay or move to Arizona in order to produce the maximum amount of electricity. The aim of installing solar panels is to take advantage of solar energy to become energy efficient, save your utility bills and contribute to the environment. 

According to the research data released by the Clean Energy Council a 7.5 kW solar system can produce around 28 kWh to 38 kWh of energy every single day. An average United States household consumes around 893 kilowatt-hours (kWh) a month which amounts to 10,715 kWh per year. 

Although this estimation is generated by reading the data from normal solar panels and solar systems. If you utilize higher-quality solar equipment and solar panels then the energy output will be significantly higher. For example, if you use solar equipment made by Hanwha Qcells, Solaria, Silfab Solar, Mission Solar, etc. then you can expect an energy output of at least 38 to 43 kWh while using a 7.5 kWh solar system. 

If the produced energy surpasses your daily household usage it is recommended to use a storage system so that you can save up the excess energy and use it in the time of emergencies or during the evening when sunlight is unavailable. 

The total number of solar panels required for a 7.5 kW solar system

When it comes to the installation of solar panels or a solar system, maintaining quality is an extremely important factor. Especially if you are using a comparatively large system for your residential or commercial property then better quality solar panels will ensure better output along with endurance. 

For example, if you are using 330 W solar panels then you need to install at least 23 solar panels in order to produce (23*330) W = 7590 W or 7.59 kW electricity. Similarly, for every kind of solar panel, the number will be different. In case you want to use the least amount of solar panels (a total of 15 solar panels) then you will need to install 500 W solar panels. 

For any other solar panel options, you can refer to the list below:

  • 350 W solar panels – 21 pieces
  • 390 W solar panels – 19 pieces
  • 420 W solar panels – 18 pieces
  • 450 W solar panels – 17 pieces

Roof space required for installation of a 7.5 kW solar system

As mentioned earlier, if you are using 330 W solar panels then you will have to install at least 23 solar panels for a 7.5 kW solar system. The size of residential solar panels tends to be 5 feet tall by 3 feet wide which means their total dimensions are 15 square feet. Therefore, 23 solar panels will require 345 square feet of space. 

On the other hand, if you use a 500W solar panel then these panels come with a dimension of 27.5 square feet. The total number of solar panels needed for a 7.5 kW solar system is 15 which means it will take 412.5 square feet of space on your rooftop. 

Before analyzing which solar panel would be proficient for your roof, you should get in touch with a professional installer who will help you out with the measurements and assist you in understanding which solar panels would be ideal for your roof. 

How much can you save through a 7.5 kW solar system?

Before discussing this topic you need to know that utility companies generally pay less money for transferring electricity from your solar system to their grid. Therefore, your savings on utility bills will depend on your daily electricity usage. 

For example, if we consider the fact that you are receiving around 12 cents on every kWh of electricity transferred to the grid from your home you can save at least $750 on your quarterly electricity bill. 

Here you need to note that we have simply assumed 12 cents is the rate offered by the utility company. If the utility company in your region provides better rates then you will be able to save a lot more money. 

Solar Panel TypeNumber of PanelsTotal Space Required (sq ft)Estimated Savings ($)
330 W23345$750
500 W15412.5$750

Final words

By now you must have received the answer to your question: how much does a 7.5 kW solar system produce? However, if you are thinking about installing a 7.5 kW solar system at your residence you need to consider the intensity of the sunlight in your area, your daily electricity consumption, etc. before you finalize the deal. 

More importantly, if you have less space but still want to continue with the 7.5 kW solar system you may have to invest more money in solar panels. If the quality of the solar panels is better then they will be able to generate more electricity while consuming less space. 

Frequently Asked Questions

How many solar panels are needed for 7.5 kW?

Usually, households in the United States of America need almost 30 kWh of electricity every day which amounts to 900 kWh of energy per month. A normal residential solar panel has the capacity to produce 120 watts of energy or 0.12 kW energy at an optimal condition which means you will require around 62 solar panels for a 7.5 kW solar system. 

How long do solar batteries last?

Depending on the brand quality and usage a solar battery has the ability to last between 5 years to 25 years. Generally, lithium-ion batteries are used in the storage system of solar panels, and their general lifespan of 15 years. However, with proper usage, maintenance, depth of discharge, etc. it can definitely last longer. 

Can solar work without a battery?

Yes, you can definitely install a solar panel at your home with a storage system or a battery. In this case, the solar panels are generally connected to a nearby electrical grid, and the excess energy produced by the solar panel is transferred to the connected grid.

However, you also need to note that if you are using this kind of solar system during a blackout your solar system will be turned off to prevent any kind of accidents or harm to the utility workers.

Do solar batteries last all night?

Depending on your storage capacity, energy production rate, and usage requirements solar batteries can efficiently support your nighttime electricity usage. While you are installing the solar system you need to know about your daily electricity usage and install a battery that would be sufficient to offer you uninterrupted energy distribution throughout the night.

How long do solar panels last?

Generally, solar panels can last at least 25 years and if you have installed better quality solar panels with proper maintenance they can last up to 35 years. After 35 years, the solar panels would still continue to generate electricity but their output will be significantly less and a lot of sunlight will get wasted during the conversion process.

In this article, we have mentioned how much energy a 7.5 kW solar system can generate annually and every day. Moreover, we have discussed what are the factors that can influence energy production, how many solar panels you will require, how much roof space you will need, and the amount of money you will be able to save by using a 7.5 kW solar system.

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