How many solar panels do I need for 6.6 kW?

Assuming you have an average home in the U.S. that uses about 11,000 kWh of electricity per year and you want to cover 100% of your electricity usage with solar panels, you would need 29 solar panels that produce 340 watts each. The average cost of a 5kw solar panel system is $18,600 before installation and other associated costs.

What is 6.6 kW?

6.6 kW is a lot of power! It can easily run a small to medium sized home and all of its appliances. With that much power, you could even charge an electric car!


The following are some of the benefits of a 6.6 kW Solar system?

There are many benefits of 6.6 kW solar panels, including the following:

  1. They can significantly reduce your electricity bills.
  2. They can help you to become more energy independent.
  3. They can increase the value of your home.
  4. They are a great way to reduce your carbon footprint.
  5. They require very little maintenance once they are installed.

How Many Solar Panels Do I Need for 6.6 kW?

How Many Solar Panels Do I Need for 6.6 kW?

In order to generate 6.6 kW of power, you will need approximately 22 solar panels. This number can vary depending on the efficiency of the panels and the amount of sunlight available.

What Type of System Should You Use for 6.6 KW?

There are two types of solar PV systems: grid-tied and off-grid. Grid-tied systems are connected to the utility grid, and allow you to sell excess electricity back to the grid. Off-grid systems are not connected to the utility grid, and require batteries to store excess electricity.

For a 6.6 kW solar PV system, we recommend a grid-tied system. This system will be less expensive and easier to maintain than an off-grid system.

Different Types of Solar Panels

There are three types of solar panels: monocrystalline, polycrystalline, and thin-film. 

Monocrystalline solar panels are made from a single crystal of silicon. They are cut from larger crystals that have been grown in a lab. They are more efficient than polycrystalline solar panels and they perform better in low-light conditions. However, they are also more expensive.

Polycrystalline solar panels are made from multiple crystals of silicon. They are less efficient than monocrystalline solar panels but they cost less. They perform well in moderate light conditions but their performance declines in low-light conditions. 

Thin-film solar panels are made from layers of semiconductor materials such as cadmium telluride or amorphous silicon. They can be manufactured on flexible substrates so they are often used in portable applications such as calculators and watches. They have the lowest efficiency of the three types of solar panels but they are also the least expensive.

How Much Will It Cost to Install a 6.6 KW System?

The average cost of a 6.6 kilowatt (kW) solar panel system in the United States is $12,840 after claiming the federal solar tax credit, according to EnergySage data. 

The cost of a 6.6 kW solar system will vary depending on the factors below. Use the calculator tool to get tailored pricing for your home.

System size: A 6.6 kW system is made up of 30-33 solar panels and typically starts at around $16,200 before the federal solar tax credit. 

Solar panel costs: The price you pay per watt ($/W) for your solar panels decreases as you buy more panels in bulk. The average price of solar panels is currently $2.71 per watt. 

Inverter costs: Inverters convert direct current (DC) into alternating current (AC), so that your electricity can be used by appliances in your home. String inverters are the most common type for residential systems and usually start at around $500. 

Permitting and inspection fees: These fees charged by your local government ensure that your system is installed safely and up to code – typically adding $500-$1,000 to the total cost of installation. 

Sales tax: Depending on where you live, you may have to pay sales tax on the total cost of installation, which would add several hundred dollars to the price tag. 

Other Useful Information and Tips

If you’re thinking about installing solar panels, you probably want to know how many you need to power your home. The answer depends on a few factors, including the size of your home, your energy usage, and the amount of sunlight your area receives.

To get a general idea, most homes will need between 20 and 30 solar panels to produce enough electricity to cover their needs. If you have a small home or live in an area with lots of sun, you may be able to get by with fewer panels. If you have a large home or live in an area with less sun, you may need more panels.

There are a few other things to keep in mind when deciding how many solar panels to install:

  • The average solar panel produces about 200 watts of power. So, if you’re looking to produce 1 kilowatt (1,000 watts) of power, you’ll need 5-6 panels.
  • Solar panels typically come in sizes between 50 and 350 watts. So, if you know how much power you need, you can choose the right sized panel for your needs.
  • The efficiency of solar panels has been increasing in recent years. So, even if two different types of panels have the same wattage rating, one may be more efficient than the other and produce more power per square foot.
  • You’ll also need to factor in the cost of installation when deciding how many solar panels to use.


Finding the right number of solar panels for your 6.6 kW system can be daunting, but with a few simple calculations you can determine what size array is ideal for your home and energy needs. With the help of an experienced installer, you can ensure that you get the most out of your investment in renewable energy. Solar power provides clean, reliable electricity that will save money on monthly utility bills while helping to protect the environment. Investing in solar now will pay dividends over time and offer peace of mind knowing that you are doing your part to reduce emissions and create a more sustainable future.

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