Complete review of Tesla solar panels: are they worth it?


complete review of tesla solar panels
Tesla offers some of the lowest prices in solar. Long story short, you get what you pay for. Image source: Tesla

If you’ve been considering installing solar panels, chances are you’ve come across Tesla. And while their website makes it seem like going solar with Tesla is the best way to have a high-tech home of the future while simultaneously lowering your electric bill, that actually might not be the case. 

So, what’s making the switch to solar with Elon Musk really like? Is Tesla’s low pricing too good to be true? 

In this article, we break down everything you need to know about buying Tesla’s solar panels, from Tesla’s approved financing options to whether or not buying them is the best choice for your roof. 

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    How much do Tesla solar panels cost?

    Tesla solar panels cost $2.01 per watt before the federal solar tax credit, which is cheaper than the national average cost of solar. After the solar tax credit, the cost per watt falls to about $1.48 per watt. 

    Tesla has made buying solar panels as easy as buying a new shirt by offering standardized solar system sizes: small, medium, large, and extra large. 

    The following table lists the system sizes and their costs: 

    Tesla solar system sizes and costs before incentives
    System size Cost before incentives
    4.08 kW $8,200
    8.16 kW $16,400
    12.24 kW $24,600
    16.32 kW $32,800

    To order Tesla solar panels, all you have to do is go to their website, enter your address, and Tesla recommends what system size is best for you based on your energy usage. You can also pick one of their other sizing options if you don’t think their recommendation works for you.

    How are Tesla’s solar panels so cheap?

    Tesla’s easy ordering process is one of the reasons they have such low prices. 

    By offering four standard system sizes and having the whole process online, they’ve cut out the need for salespeople to go over specifications and detailed information with homeowners. 

    Their brand name recognition helps, too. Tesla doesn’t have to do a whole lot of work to get people to their website. People know Tesla - so they go right to it. This, plus the online ordering process practically eliminates overhead costs that many other solar companies face. 

    Not to mention, Tesla is a large company - they can afford to undercharge for their panels and take a slight loss at the front end of the deal. 

    Tesla’s solar financing

    Tesla solar installations may be cheap in comparison to its competitors, but not everyone has thousands of dollars laying around to pay in cash. Tesla offers homeowners the ability to take out a loan directly with Tesla. 

    Tesla solar loan 

    Tesla’s solar loan works like any other regular solar loan. You take out a loan with Tesla and make monthly loan payments back to them over a specified term. With Tesla’s loan, you are the owner of the system, so you get the benefits of the solar tax credit and other solar incentives, like SRECs

    The following table outlines the estimated monthly payments for Tesla’s different solar system sizes: 

    Estimated monthly payments by system size
    System size Down payment Monthly payment
    4.08 kW $1,870 $147/month
    8.16 kW $2,690 $212/month
    12.24 kW $3,510 $277/month
    16.32 kW $4,980 $392/month

    Tesla’s solar loan has a 10-year term and 0.99% APR.

    Is it worth installing Tesla solar panels in your area?

    Features of Tesla solar panel systems

    By just reading through Tesla’s website, you might think that they are offering some sort of exclusive-to-Tesla product. In reality, however, Tesla doesn’t manufacture their own solar panels. 

    Tesla solar installations use Hanwha Q CELLS’ Peak Duo Black solar panels, more specifically the Q.Peak Duo Blk-G6+ modules, which are not exclusive to Tesla. In fact, multiple solar installers throughout the U.S. offer these solar panels.

    Don’t get us wrong - Hanwha makes great solar panels. But Tesla tries to make it seem like they’re providing a Tesla-only product, and that’s just not the case. 

    Let's take a look at what these panels offer in terms of performance: 

    Tesla solar panel performance
    Spec Q.PEAK DUO BLK-G6+
    Type Monocrystalline
    Wattage 340 W
    Efficiency ≥19.0%
    Power tolerance +5 W / - 0 W
    Temperature coefficient -0.36%
    Dimensions (with framing) 68.5" X 40.6" X 1.57"
    Warranty 25-year performance warranty, 10-year comprehensive warranty

    Don’t get us wrong - Q CELLS are great Tier 1 solar panels. They’re a reliable brand with a high quality product. They have a high efficiency rating, but not the highest on the market. The power tolerance and temperature coefficients are in line with other Tier 1 solar panels that suggest they will operate well under real-world conditions. 

    The only thing we’re unsure of is the performance warranty. According to the QCELLS’ website, the panels will operate at at least 85% of their original capacity after 25 years. This is great, but Tesla’s website gives different information. 

    According to Tesla, the panels will only operate at at least 80% of their original capacity by Year 25. This isn’t a huge difference, and it’s still in line with industry standards, but having conflicting information doesn’t really look great for Tesla. 

    How do Tesla solar panels work?

    Tesla solar energy systems are made of three basic components: 

    • Solar panels
    • Tesla’s new solar inverter
    • Tesla’s Gateway monitoring system

    The solar panels take sunlight and convert it into electricity. The electricity then travels from the solar panels to the Tesla solar inverter, where it is converted into AC electricity that your home appliances can use. 

    When you use the electricity your solar panels make, you use less energy from the grid, thereby lowering your power bill. 

    The solar panels will produce the most electricity in the middle of the day, when the sun is highest in the sky. Any energy that your solar panels produce that your home doesn’t use will be sent to your Tesla Powerwall solar battery. 

    At night, when your home’s energy usage is higher than what your panels are producing, you will take electricity from your battery or the grid, depending on how much power you have stored. 

    The Gateway monitoring system keeps track of this process and how your solar power system is performing, which you can keep an eye on with the Tesla app. 

    Do you need to install a Tesla Powerwall with Tesla solar panels?

    Yes, you have to install a Tesla Powerwall with Tesla solar panels. Tesla now requires all of their solar panel and solar roof systems to be paired with a Powerwall battery. 

    This can be beneficial if you were already considering battery storage for your solar panel system. However, if you live in an area with full-retail net metering this will just increase your installation costs without providing you with that much more in additional savings. 

    The savings may play out better in states with battery storage incentives, like in California where the SGIP battery incentive can cover over $2,000 of the total cost of a Powerwall. 

    Overall, Tesla now requiring their solar systems to be paired with Powerwalls won’t make financial sense for most homeowners

    What is the difference between Tesla’s solar roof and Tesla solar panels?

    Tesla solar panels look like the solar panels you’re used to seeing on roofs. They are installed on top of your existing roof and generate electricity for your home to use. 

    Tesla’s solar shingles are designed to look like traditional roofing materials, so you can’t tell that there is solar installed on the roof. 

    Tesla solar shingles require a full new roof replacement, so the solar roof tiles don't stand out from the rest of your shingles. Unlike their traditional rooftop solar panels, Tesla manufactures their solar shingles themselves at their Buffalo, New York gigafactory. 

    You can read more about how Tesla’s solar roof compares to conventional solar panels here

    Tesla’s customer service comes up short

    It’s true that you’ll probably get the lowest price for going solar when you go with Tesla. But the price of solar also includes the cost of the long-term relationship that you get with your solar installer, and that seems to be where Tesla cuts costs. 

    Unfortunately, Tesla has historically been known for having pretty shoddy long-term customer service - which you can read about in customer reviews here on SolarReviews. Because they are such a large company, they don't have the ability to give you the type of one-on-one service that you need when going solar. 

    Tesla’s customers have reported that it’s hard to get ahold of them if there’s a problem with their system, and it can take even longer to get someone out to check on the issues. This can actually cause you to lose a substantial amount of money

    If your solar panels aren’t producing energy properly, you have less electricity to power your home, and thus a higher electric bill. The longer it takes for someone to fix your system, the more money you lose.

    Are Tesla solar panels worth it?

    At first glance, a Tesla solar panel installation seems like a no-brainer. They have an easy ordering process and they offer good-quality solar panels at an insanely low price. All we can say is that if it seems too good to be true, it probably is. 

    When it comes to solar, the communication between you and your solar company is key. You’ll be dealing with them for 25 years, at least! Tesla’s track record shows that they might not be the ones you want to rely on if something goes wrong. Cutting costs won’t be worth the potential headache you could incur after the solar installation.

    We recommend getting quotes from a few local solar installers before you decide to go solar with Tesla. A local installer’s prices will most definitely be higher than Tesla’s, but the cost includes the value of a long-term customer relationship, and to us, that’s priceless. 

    Find out how much you can save this year by installing solar 

    Key takeaways

    • Tesla solar panels cost $2.01 per watt before the federal solar tax credit is applied.
    • Tesla does not manufacture their own solar panels, instead they use Hanwha QCELLS Q.Peak DUO panels.
    • You are now required to pair your Tesla solar panel system with a Tesla Powerwall battery.
    • While Tesla may offer a low price for solar, they don’t offer great customer service, which is pertinent for a 25-year investment like solar panels.
     - Author of Solar Reviews

    Catherine Lane

    SolarReviews Blog Author

    Catherine is a researcher and content specialist at SolarReviews. She has strong interests in issues related to climate and sustainability which led her to pursue a degree in environmental science at Ramapo College of New Jersey.

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