Updated 3 days ago
How much does a 6kW solar power system cost and how much electricity does it produce?
Written by
Andy Sendy
How many solar panels do you need?
As the cost of solar panels continues to decline, 6 kilowatt (kW) solar PV systems are becoming a more popular option for homeowners.
In many states, a 6kW PV system will be enough to power an entire house, but it depends on your location and energy needs. We will walk you through the cost, size, and practicality of a 6kW system before you decide to buy.
How much does an average 6kW solar system cost?
Based on the average cost of solar in 2025, a 6 kW solar system in the U.S. will cost about $18,000 With the 30% federal tax credit, the solar system price drops down to about $12,000.
Depending on where you live, you can benefit from additional state or utility-based solar rebates and incentives that may reduce the price even more.
The system design and parts can also change the price, like inverters and ground mount racking, among other things. In the chart below, we break down what you can expect to pay around the country.
State | Avg. cost of 6kW solar system | Avg. cost of 6kW solar system after tax credit |
|---|---|---|
$16,080 | $11,256 | |
$15,480 | $10,836 | |
$15,600 | $10,920 | |
$14,940 | $10,458 | |
$15,840 | $11,088 | |
$16,620 | $11,634 | |
$17,220 | $12,054 | |
$13,980 | $9,786 | |
$17,160 | $12,012 |
Can you finance a 6kW system?
Just because 6kW systems are becoming cheaper, that doesn’t mean that everyone can pay cash upfront to own one. Luckily, there are many financing options available.
If you qualify, a zero-down solar loan is a great way to finance your solar system.
In some states, you can opt for solar leases or solar power purchase agreements (PPAs) from solar companies. Solar loans and solar leases allow you to pay the full cost over time while still benefiting from solar savings. PPAs are a bit different - the solar company owns the solar panels on your roof, and you pay them a monthly payment for the solar energy the system produces.
Solar leases and solar PPAs have lower long-term utility bill savings than purchasing a system outright. Though financing solar panels will still deliver long-term electric bill savings, paying in full upfront is the best choice.
How many solar panels are in a 6kW solar power system?
A 6kW energy system has 15 solar panels.
Depending on the wattage of the solar panels you choose to go with, the actual number of solar panels for your 6kW system will vary. Most solar panels today have a wattage of about 400 watts.
For example, if you install 350-watt solar panels, you’ll need about 17 panels to make a 6kW system. But if you use more powerful 400-watt panels, you’ll only need 15 panels to reach a 6kW system size.
How much roof space do you need for a 6kW solar system?
A 6kW solar panel system will require about 265 square feet of space on your rooftop.
It’s important to note that the actual square footage required will depend on the wattage and the dimensions of the panels you install.
High-efficiency solar panels will create more energy, increasing actual power output in a smaller area. That means if you do not have 265 square feet, higher efficiency panels can help you reach a 6kW solar array.
How much power does a 6kW system produce?
A 6kW system will produce about 400 to 900 kWh of electricity a month, meaning the amount of energy produced ranges between 4,800 to 10,800 kWh per year. The amount of energy solar panels produce will vary depending on where you live, so a 6kW system in sunny Arizona will generate more electricity than if you live in rainy Washington.
Because the average U.S. home’s monthly electricity usage is 875 kWh, a 6kW system might be too small for the power consumption of many homes.
How much can I save with a 6kW solar system?
Because every state has different rates for electricity, your savings will vary. If you live in a state with high electricity costs, your solar system will save you more money. Your power bill savings will also be affected by the amount of energy your solar system produces.
For example, if a 6kW solar system generates 900 kWh a month in California, it will save you about $265 a month. A system installed in Texas, where electricity is cheaper that produces 900 kWh would save a homeowner $130 a month. The bottom line is - no matter where you live, solar will save you money on electricity.
The following table shows estimates of how much a 6kW system can save in different states:
State | Estimated yearly savings from 6kW solar system |
|---|---|
$3,200 - $4,800 | |
$1,600 - $1,900 | |
$,200 - $2,400 | |
$1,300 - $1,611 | |
$2,200 - $2,500 | |
$1,500 - $1,700 | |
$2,700 - $3,000 | |
$1,300 - $1,500 | |
$1,900 - $2,200 |
A utilities net metering policy will also play a large role in how much a 6kW solar panel system saves.
The combination of electricity prices, net metering rules, incentives, and the local cost of solar installation will impact your solar payback period. Areas with high electricity prices and strong net metering programs will have the shortest payback period.
How do I find the right installer for a 6kW solar system?
If you are interested in off-grid solar panel options or want to install solar panels yourself, it is possible to buy a DIY solar kit to install a 6kW system. A DIY kit costs about $10,000, making it slightly cheaper than the installed price you will get with a solar company.
Although it is technically cheaper to buy a DIY kit, many times you will need the help of a solar installer or a licensed electrician. After solar installation, electricians will ensure that the system will pass inspections.
All of that extra work can cost more than having a licensed solar installer install your panels. Also, when you work with licensed professionals, you can benefit from a 25-year warranty on your panels, a perk you do not get with DIY.
To really be sure if a 6kW system is right for you, it makes sense to work with trusted solar installers to determine the number of solar panels your home needs. Find out what local incentives you can qualify for and if a 6kW system is right for your home’s energy needs!
Andy Sendy is a well-known and trusted figure within the solar industry with more than 15 years of experience. His video reviews of the leading brands of solar panels and home energy storage batteries are a must-watch each year for both homeowners and solar industry professionals alike. In 2021, an article he wrote about a clause in the Tesla solar panel rental contract caused Tesla to change this clause within days. He was the founder of Sola...
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