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Q CELLS solar panels: the complete review

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Q CELLS is one of the world’s largest solar panel manufacturers, and is headquartered in Germany. Q CELLS has a number of different product lines in the Q.PEAK DUO series: from the G5 up through the G7, and including a number of sleek, all-black panel options. The combination of aesthetically pleasing and high performing panels at a low cost has made Q CELLS an increasingly popular choice for solar shoppers comparing their options on the EnergySage Solar Marketplace.

NOTE: As of early 2020, Hanwha Q CELLS has rebranded to Q CELLS. We’ve updated this article to reflect their new branding.

The best way to be confident in your solar investment is to thoroughly review the product options available to you. To make your solar research process easier, EnergySage has developed Q CELLS reviews. As the leading online marketplace for homeowners considering solar, EnergySage is uniquely positioned to evaluate the technical specifications of Q CELLS solar panels and help you compare them to other manufacturers on the market.

How Q CELLS solar panels compare to other panel manufacturers

There are four key metrics that you should review as you evaluate solar panel quality: efficiency, performance, warranties, and price. EnergySage has developed Q CELLS reviews for each metric to help make your solar decision easier. We’ve also created a comparison of Q CELLS solar panels against other leading panel manufacturers that are frequently featured in offers to homeowners and businesses shopping for solar on the EnergySage Solar Marketplace.

Q CELLS efficiency

The term “solar panel efficiency” refers to how well a solar panel captures sunlight and converts it into useful electricity. In the same conditions, a high-efficiency solar panel will produce more electricity than a lower-efficiency panel of the same size. For this reason, a higher efficiency rating is generally preferable.

The efficiency of your Q CELLS solar panels will vary depending on the specific model that you choose for your system. Across the full Q CELLS product line, you can get solar panels with anywhere from 17.1% to 20.6% efficiency. Overall, most Q CELLS panels fall into the middle-of-the-road efficiency range for solar, but the panels that have 18% efficiency or higher can be considered “high efficiency.”

Q CELLS performance (temperature coefficient)

For this portion of EnergySage’s Q CELLS reviews, we use the temperature coefficient to evaluate solar panel performance. The temperature coefficient is an indicator of how well your solar panel can handle less-than-ideal conditions. Solar panels, like other electronic equipment, perform better when they are kept cool (ideally around 25° C/77° F). The temperature coefficient tells you how much your panel’s performance will change during hot sunny summer days.

For every degree above 25° C (77° F), your solar panel’s electricity production will decrease by its temperature coefficient. For example, the Q CELLS Q.PEAK DUO BLK-G6+ 340 panel has a temperature coefficient of -0.36%/°C. This means that, if the panel’s temperature increases by one degree from 25° C (77° F) to 26° C (79° F), its electricity production will decrease by 0.36%. If its temperature increases all the way to 35° C (95° F), electricity production will reduce by 3.6%.

Your solar panels will likely see more than a few hot and sunny days over the course of each year, so ideally, they will have the lowest temperature coefficient possible. Q CELLS panels offer a temperature coefficient ranging from -0.39 to -0.35.


Whether you’re buying a TV, a car, or solar panels, the manufacturer should stand behind their product with a strong warranty. A solar panel’s materials warranty (sometimes referred to as the product or equipment warranty) is a guarantee from the manufacturer that they will replace your panel if it fails as a result of manufacturing defects or environmental issues.

Most solar panel manufacturers offer a 10-year materials warranty, but some higher-end solar panels come with a 12, 15, 20, or even 25-year warranty. Q CELLS previously offered a 12-year warranty against any defects in their solar panels, but now offer an industry-leading 25 year-warranty on newer models.

Q CELLS solar prices: How much do Q CELLS solar panels cost?

For many homeowners, the final decision around the solar equipment you choose rests on cost. The total price you pay for a solar energy system with Q CELLS panels will vary depending on the other equipment (such as inverters and mounts) used in the installation, as well as the characteristics of your roof.

To identify the range of prices for Q CELLS systems, we analyzed quotes including Q CELLS solar panels that homeowners received from installers on the EnergySage Solar Marketplace. Most Q CELLS systems are typically priced between $2.32 and $3.08 per watt, which makes Q CELLS one of the best values on the market for home solar.

This means that, for a 6 kW system, your gross cost (before you subtract any tax credits or other incentives) would be anywhere from $13,920 to $18,480. Additionally, most homeowners end up paying much less than the total gross cost. With the 26 percent federal tax credit for solar, which everyone is eligible for, a 6 kW system with Q CELLS would cost anywhere from $10,301 to $13,675. There are plenty of state-level solar incentives and rebates that can help you reduce upfront costs even further. 

Q CELLS solar panels may not offer industry-leading efficiency or performance, but their price to quality ratio makes them a great value for many homeowners who are considering solar. Overall, there are plenty of compelling reasons to consider Q CELLS panels for your home solar installation.

How to find the best price on Q CELLS solar panels

The best way to determine whether Q CELLS solar panels are the best solar panels for your home is to review multiple quotes with different solar equipment options before making a decision. When you compare all of your options on the EnergySage Solar Marketplace, you’ll find the right combination of price and quality that meets your needs. Many of our qualified, pre-vetted solar installers offer solar panels in their quotes to EnergySage users. The more quotes you receive the more options you’ll have: you might have the choice between various series lines like Q Peak, Q Plus, Q Power and Q Prime. When registering, simply note in your profile that you’re interested in receiving quotes that include Q CELLS for your home.

13 thoughts on “Q CELLS solar panels: the complete review

  1. jax

    just look at ebay 25 panel for 200 dollar each… keep five for later use…

    still cheap.. get enphase 125 … 325 for 390 w panel is great..

  2. Robert

    I do Hanwha Q-cell systems all the time. The new G5.2 line is amazing, 72-cell size 380-390 watts. 19.4-19.6% efficiency. A bit more pricey but its wrong to say Hanwhas are less expensive than others. This line is higher priced.

  3. silvio fontana

    I am now finalising the installation of 14 additional Q Cell Q. Peak Duo G5 325w panels to my existing 5.4Kw enphase system.

    Total cost $8190, that $585 per 325 watt panel including IQ7 enphase micro Inverters

    Very Pleased with this system



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