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This is a current list of solar manufacturers in the United States that produce solar panels for the traditional residential, commercial and utility-scale markets. This data was collected by Solar Power World editors and will be continually updated as facilities are started and/or expanded. If there is a American facility update related to solar panels not included on these lists, please contact editor Kelly Pickerel at


The United States is growing its domestic polysilicon solar manufacturing abilities. A traditional silicon solar panel requires polysilicon, which is then shaped into silicon ingots, which are then cut into silicon wafers, which turn into silicon solar cells that are finally assembled into silicon solar panels. As new facilities start through every step of the silicon solar manufacturing process, they will be added here.

It will also decrease the dependence of the U.S. on foreign energy supply, which improves U.S. energy security, and also increases the export of renewable generation equipment from the U.S. Focusing on improvements in domestic solar manufacturing will help the U.S. Department of Energy (DOE) Solar Energy Technologies Office (SETO) reach its goals.

SolarReviews, a US-based independent comparison website for solar panel brands and installations, has released its first solar manufacturer ranking system. Here are the top 10 solar panel manufacturers in 2021.

The Solar Panel Manufacturer Scoring System analyzed hundreds of data points drawn from solar panel spec sheets, company financial statements, and state-level government statistics to score each solar panel brand. The rankings take the following factors into account:

Financial visibility and strength (20%). The financial health of the solar panel manufacturer serves as the best indicator of whether the company will be in existence to honor warranty claims that may arise.

The US solar market is made up of hundreds of solar panel brands of varying price points and value. Consumers are often faced with the challenging task of balancing the upfront cost of panels and the longevity of the solar system to ensure long-term savings are realized.

SolarReviews is independent, and putting solar panels on your roof is a smart yet big investment. So this guide is extremely helpful for those folks who are sitting down with their installer rep and deciding on which solar panels to choose.

When choosing a solar panel brand, there are a number of factors to consider, from efficiency, to temperature coefficient, to warranties. As more homeowners are looking to use renewable energy, a growing number of people also care about where their solar panels are manufactured, especially as supply chain constraints lead to solar panel installation delays. So, who are the biggest solar companies in the world and in the U.S.? We reviewed global shipping data and solar panel specifications to determine who comes out on top to help you find the best and most energy-efficient option for going solar and saving money on your electric bill.

Founded in 2009, Tongwei Solar is one of the largest crystalline silicon solar cell production companies in the world. Tongwei Solar has four locations in China and is a subsidiary of the large agricultural product company Tongwei Group. They manufacture both polycrystalline and monocrystalline solar cells and panels, shipping 12.1 GW in 2020.

Aiko Solar specializes in the manufacturing of PERC solar cells. Based in China, Aiko makes three primary products: a 210 millimeter (mm), 182mm, and 166mm PERC cell, with the 210mm product being the newest, coming to market in 2020.

JinkoSolar produces a wide range of solar and storage products for use across solar projects of all sizes. Recently, JinkoSolar opened a manufacturing location in Jacksonville, FL to help meet U.S. demand for their products.

Its name gives it away, but Canadian Solar is a solar manufacturer originally founded (and still headquartered) in Ontario, Canada. Aside from a wide range of home solar modules, Canadian Solar also produces and sells inverters, and home energy storage solutions as well as partnerships with Enphase micro-inverters. They also offer a workmanship warranty.

Zhongli is a Chinese technology conglomerate that owns Talesun Solar (founded in 2010), a leading photovoltaic manufacturer worldwide. Zhongli/Talesun produces both bifacial and monofacial solar modules.

SunTech (or SunTech Power) is a Chinese solar services provider with 21 years of experience in solar manufacturing. They produce mainly high-powered solar modules designed for large commercial, industrial, and utility-scale installation projects.

The lone U.S. company on our list, First Solar is also unique in that they produce thin-film solar panels (as opposed to the crystalline panels most other major manufacturers focus on). First Solar uses cadmium telluride (CdTe) as their semiconductor in their modules.

After reading through the options to find the most high-quality manufacturer and installer in your area, you will find that there are also many different ways to purchase solar panels. Depending on your needs and financial situation, you can choose to buy or lease a solar panel system. If you go with a solar lease, you will be able to acquire a solar energy system for little or no money down. Solar leases and power purchase agreements (PPA) mean that the panels on your roof are owned by a third party. You can also take out a solar loan which is a way to finance your solar panel or solar battery installation cost. Buying panels outright with cash is another option that can be expensive upfront but may save you money in the long run.

For any homeowner in the early stage of shopping for solar that would just like a ballpark estimate for the solar installation process, try our Solar Calculator that offers upfront cost and long-term savings estimates based on your location and roof type. For those looking to get quotes from local contractors today, check out our quote comparison platform.

Jacob is an EnergySage writer with expertise in solar, electrification, and renewable energy. With over five years of experience researching and writing about the home energy industry (plus a degree in Geological Sciences from Tufts University), he brings a unique scientific approach to writing and investigating all things energy.

The United States solar industry employs around 250,000 people as of 2022 and is expected to see continued job growth year over year. Additionally, those who prioritize clean energy adoption and supporting U.S. manufacturing are driving the industry.

Finding 100% American-made solar panels can be complex. Whereas many American solar companies manufacture their solar panels overseas, even those that manufacture solar panels may not source all of the solar panel components from the U.S. To complicate matters, solar companies that are based in the United States may not manufacture their solar panels in the U.S., and companies that manufacture solar panels in America may have headquarters abroad.

Many NREL manufacturing cost analyses use a bottom-up modeling approach. The costs of materials, equipment, facilities, energy, and labor associated with each step in the production process are individually modeled. Input data for this analysis method are collected through primary interviews with PV manufacturers and material and equipment suppliers.

Currently, the solar cells being used can meet commercial and homes electricity demand. Solar panels are also being installed to generate electricity to power business and manufacturing operations. As further research continues on solar energy, it could emerge as the preferred source to run economies.

The first crucial component required to make solar cells is pure silicon. However, silicon is not pure in its natural state. It is derived from quartz sand in a furnace requiring very high temperatures. Natural beach sand is the main component in making pure silicon. Though it is an abundant resource in the world, the process of getting pure silicon comes at a cost and requires a lot of energy.

The first process in solar panel manufacturing is purifying the silicon from quartz sand. Once silicon is purified, it is collected into solid rocks. These rocks are then molten together, forming cylindrical ingots. A steel and cylindrical furnace is utilized to achieve the desired shape. When manufacturing is underway, there is a keen attention to have all atoms align in desired orientation and structure.

To give the silicon positive electrical polarity, boron is included in the process. To make monocrystalline cells, the manufacturer only uses one silicon crystal. As a result, such solar panels have high efficiency. However, they come at a higher cost.

For polycrystalline cells, the manufacturers melt several silicon crystals together. These panels have a shattering glass appearance derived from the various silicon crystals. Once the formed ingot cools, it is shinned and polished to leave flat sides.

The next step in solar panel manufacturing after making ingots. To make wafers, the cylindrical ingot is thinly sliced into thin disks. It is done so one at a time using a cylindrical saw. Manufacturers can also use a multiwire saw to cut many at a time.

Manufacturers follow several steps to convert the silicon wafers into usable solar cells. They treat each wafers and add metal conductors on the surface. The added conductors result in a grid-like matrix appearance on the surface. They ensure sunlight is converted into electricity.

Once the solar cells are made, the manufacturers connect them using metal connectors. Solar panels are a combination of solar cells in a matrix-like structure. The market standard of solar panels are:

After the manufacturers combine the solar cells, thin glass casing is placed on the side to face the sun. They also use highly durable polymer-based material to make the back sheet. This prevents things such as water, soil, and others from getting to the solar cells. 041b061a72


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