Panasonic solar panels review

Panasonic solar panels: the complete review

Panasonic is one of the world’s largest manufacturers of consumer electronics and an increasingly popular choice for U.S. homeowners installing solar. Panasonic’s heteroinjuction technology (or HIT) is included across their product lines, providing a unique take on the solar cell. Their HIT, HIT+ and HIT AC series are all high performers on EnergySage, with Panasonic the most quoted solar panel brand on EnergySage in 2019. They announced in 2021 that they would no longer be manufacturing their own panels. Their panels will now be manufactured by a third party but still sold under the Panasonic name. Panasonic will also no longer be working with Tesla to manufacture panels.

Whether you’re trying to decide between SunPower and Panasonic solar panels or simply evaluating your solar PV options, thoroughly reviewing the product options available to you is the best way to be confident in your solar investment. EnergySage’s Panasonic reviews take a look at the technical specifications of Panasonic solar panels to evaluate how they compare to other manufacturers on the market.

This is an unbiased review: EnergySage is not paid to review brands or products, nor do we earn money from affiliate advertising in this article. The content of this blog is based on research and information available at the time of writing. Learn more about our mission and how we make money as a company.


Key takeaways


  • Panasonic’s solar panels range in efficiency from 19.1% to 21.7%, and they have a materials warranty lasting for 25 years.
  • Panasonic solar panels cost between $2.44 and $3.10/W on the EnergySage Marketplace – that’s $14,640 to $18,600 for a 6 kW system, before the federal solar tax credit.
  • As of 2021, Panasonic will stop manufacturing their own panels but will continue to sell modules made by a 3rd party.
  • Shop for Panasonic solar panels (and many other brands!) today on the EnergySage Marketplace.

What’s in this article?

How Panasonic HIT 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 Panasonic reviews for each metric to help make your solar decision easier. We’ve also created a comparison of Panasonic 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.

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 Panasonic solar panels will vary depending on the specific model that you choose for your system. While the majority of solar panels fall in the 14% to 18% range, Panasonic panel efficiency can range anywhere from 19.1% to 21.7%.

Performance of Panasonic HIT panels (Temperature Coefficient)

For this portion of EnergySage’s Panasonic 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, Panasonic’s VBHN330SA17 panel has a temperature coefficient of -0.258%/°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 0.26%. If its temperature increases all the way to 35° C (95° F), electricity production will reduce by 2.6%.

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. Panasonic’s solar panels offer some of the lowest temperature coefficients in the industry at -0.26.

Panasonic’s HIT™ technology is what gives their products high solar panel efficiency and low temperature coefficient, both of which result in higher electricity production. While conventional solar panels use a single layer of monocrystalline or polycrystalline silicon, HIT™ panels use a combination of monocrystalline and ultra-thin amorphous silicon layers to reduce power loss. The surface of Panasonic’s panels also has a pyramid structure that can reduce reflection and direct more sunlight into the solar cells, which also maximizes electricity output.

Warranties

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 or 12-year materials warranty, but some higher-end solar panels come with a 12, 15, or even 25-year warranty. Panasonic offers a remarkable 25-year warranty against any defects in their solar panels.

Check out our in-depth review of Panasonic’s warranty.

How much do Panasonic HIT 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 Panasonic 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 Panasonic systems, we analyzed quotes from installers on the EnergySage Solar Marketplace that included Panasonic solar panels. Most Panasonic systems are typically priced between $2.44 and $3.10 per watt – comfortably in the mid-range for 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 $14,640 to $18,600. Additionally, most homeowners end up paying much less than the total gross cost. There are plenty of solar incentives and rebates to help you reduce upfront costs, including the 26 percent federal tax credit for solar.

Panasonic solar panels are some of the most competitively priced panels offered to solar shoppers on the EnergySage Solar Marketplace. They offer some of the highest efficiency products on the market for a very competitive price, especially when compared to other high-efficiency products like SunPower. Additionally, they have an industry-leading warranty of 25 years. Overall, there are plenty of compelling reasons to consider Panasonic panels for your home solar installation.

Advantages & disadvantages of Panasonic solar panels

As with any product that is such a significant investment, Panasonic panels have their advantages and disadvantages to keep in mind before deciding to make a purchase.

Pros of Panasonic solar panels

  • Superior product warranty- at 25 years, Panasonic solar panels come with one of the longest and most comprehensive warranties available. 
  • Excellent customer service- as one of the largest electronics manufacturers in the world, Panasonic offers a quality of customer service that many smaller brands cannot.
  • Quality specifications- with a high temperature coefficient, these panels work well in higher temperatures 

Cons of Panasonic solar panels

  • Cost- While Panasonic has slightly cheaper options than brands like SunPower, there are still some less expensive (if lower quality) options available on the market.
  • Manufacturing- Though this isn’t a direct disadvantage, Panasonic panels are no longer manufactured by the same company so some things remain to be seen about how well these newer panels will hold up to those manufactured by Panasonic.

How to find the best price on Panasonic solar panels

The best way to determine whether Panasonic 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 Panasonic solar panels in their quotes to EnergySage users. When registering, simply note in your profile that you’re interested in receiving quotes that include Panasonic solar panels for your home.


14 thoughts on “Panasonic solar panels: the complete review

  1. Rick

    I invented a sealed bimetal spring in back of a solar panel it takes few electrons during daytime to wind up the spring. The motor generator on the spring goes into generating mode at night unwinding the bimetal spring producing a fraction of daytime power.

    Reply
  2. Mary

    Christina Hammond, Tesla was never involved with walmart. The walmart installs happened when the company was called SolarCity, prior to Tesla purchasing them.

    Reply
  3. Christina Hammond

    I have heard that many commercial projects using the solar panels that “Tesla,” was involved with have had to be completely taken off and replaced. IE Wal-Mart Stores

    Reply

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