0
= 31
In stock

GreenWatts 550W Solar Panel 144 Cell Bifacial HS72-18X-550W Wholesale 31 panels per pallet

$0.39 /W
$214.50 /panel
Authorized Distributor
(16 ratings)
1 PLT
(31 pcs)
Minimum order – 31 panels

We have changed the number of solar panels to comply with shipping terms.

More info
Return policy
How to get it33071
  • Shipping
  • Pickup
Free pickup on Mon, Nov 17 or later

Customer reviews & Questions

Verified buyer reviews
Customer Reviews
  • Reviews (16)
  • Questions (3)
Simon
02/08/2025
Good value and high efficiency 10 outta 10.
Hunter White
11/07/2024
Pretty solid quality so far Only had them up a month but good power output
Peter V.
05/10/2025
Can i tilt them flat
A1 SolarStore
You can, but a slight tilt helps shed water and increase output.
carl Roberts
05/02/2025
how much sunlight do i need?
A1 SolarStore
Ideally 4–6 peak sun hours per day for optimal performance.
cameron
01/27/2025
what does wholesale mean
A1 SolarStore
It means the panels are sold in bulk at a discounted rate for installers or large projects.

Specification

Length89.72in
Width44.65in
Rated Power Output 550 W
Voltage (VOC)49.8V
Maximum String Voltage 1500V
Number of cells144
Cell TypeMonocrystalline
Rated Efficiency21.3%
Connector TypeMC4-EVO2/MC4-compatible
Frame Colorsilver
Dimensions LxWxH89.72 x 44.65 x 1.38 in
Weight71.65 lbs
Pallet Qty31
ManufacturerGreenWatts
Manufacturer Part #HS72-18X-550W
Operating Temperatures −40°F to +185°F
Scope of ApplicationSolar Panels for Buildings
Use
  • Commercial
  • Grid-Tie
  • Off-Grid
  • Residential
Warranty25-year product warranty and 30-year warranty on power output

More GreenWatts products

FAQ

How much is shipping and how long is delivery?
Our standard shipping charge is $250 for up to 11 panels and it is increased by $25 for every 4 additional panels. In the event, the product is only available on East or West coast custom quote will be sent to you before the order is processed. Normally, we are able to deliver solar panels within 7 business days.
What is the difference between low price panels and top price panels?
With top tier solar panels, you pay for the brand name, proprietary new technology, higher energy output, and better warranty support.
What are the dimensions of the panel?
Please refer to the product datasheet on the product page. We have a datasheet for every product we sell.
How long is the warranty on the panel?
In general, manufacturers provide a 25 year-long performance warranty and a 10 year-long equipment guarantee. Some manufacturers offer 12-15 years of warranty. More information is available in our warranty support section.
Which panels do you recommend for RV, marine?
We recommend Panasonic and Mission Solar panels for smaller systems as their high energy output and excellent craftsmanship guarantee years of service.
Can this panel be used with a 12v system?
Any of our panels can be used for a 12v system with a properly selected inverter and charge controller.
Can I pick up this panel from your fulfillment center to save on shipping?
Yes, we can set up a pick up at a local distributor. Please call to discuss options and stock availability.
How do I connect these panels?
To achieve the best system efficiency, panels should be connected in series to create higher voltage.
How many panels do I need?
This number is determined by your average energy needs. Depending on the type of panels and energy consumption, you might need anywhere from 12 to 45 solar panels. Remember, the more panels you install the more energy you will get.Please use our solar calculator to estimate your energy consumption and plan on building a solar system that will exceed your energy needs by 25%.
How do I build a solar system?
Please use our solar calculator to estimate what equipment you need. Choose your panels, microinverters, inverters, and solar batteries if necessary.Please note that we do not offer solar system design or installation.
How do solar panels compare?
Solar panels differ by power output, voltage, connection type, size, efficiency, and weight. Some solar panels might be sold together with microinverters as a set.
Can I build a solar system by myself as a Do It Yourself project?
Yes, it is possible if you understand what solar equipment you need and how to connect it together. However, please be mindful that handling your own electrical work without having proper experience might cause life-threatening injuries. Please contact a certified electrician if you do not possess appropriate electrical skills.
Can I connect and charge my solar panel battery directly with the solar panel?
We do not recommend using the solar panel without the charge controller. Using solar panels without the charge controller might damage the batteries.
Can I drill holes into the aluminum frame for mounting?
We do not recommend drilling any new holes to the aluminum frame of the panel as it could damage the internal circuit and solar cells. (Also, any modification to the panel will void the warranty). We recommend only using the pre-drilled holes for mounting.
Do solar panels require maintenance? Can I wash my solar panel?
Solar panels generally require very little maintenance. We recommend cleaning the solar panel with water, glass cleaner (Windex) and microfiber cloth.
Will my panel produce power in an overcast condition?
While solar panels require sunlight to generate solar energy, they will still work in cloudy weather. Even on a cloudy day, solar panels will produce energy just not as much.
Will my panels produce power if covered with snow?
Solar panels cannot produce electricity if covered with snow.
What is the best direction for a solar panel to face?
The best direction for a solar panel to face is the South

Close-wattage solar panels

About product

HS72-18X-550W is part of the HT72-18X(PD)-F Double Glass Series — one of the most recent made by GreenWatts. These panels employ cutting-edge technologies to achieve superior efficiency and reliability. The Passivated Emitter Rear Contact (PERC) technology ensures excellent power output. This solar cell type employs an additional reflective layer to absorb more sunlight.

Half-cut cell technology adds a few more percent to the overall performance, making this model a great example of efficiency. GreenWatts made solar cells in HS72-18X-550W two times smaller than the standard size, thus reducing power loss and improving low-light behavior. Not surprisingly, the efficiency of this module is quite high – 21.3%. And while conventional panels use only one side to absorb photons, bifacial modules employ both sides at the same time. Thanks to the technology, this model can be up to 30% more efficient. GreenWatts offers a 25-year product warranty and guarantees 84.95% of original performance after 30 years of operation.

  • 550 W power output
  • 144 half-cut PERC cells
  • 21.3% efficiency
  • 1500 V DC maximum system voltage
  • MC4-EVO2/MC4-compatible connectors
  • 25-year product warranty and 30-year warranty on power output

More energy and efficiency

The PERC technology further improves an already excellent efficiency of 21.3 percent. A reliable PID resistance and a unique glass lamination were added by the maker, which ultimately produced a model that was effective and extremely durable. HS72-18X-550W produces 550 W of power under typical test settings.

Heat-resistant performance

The heat is less of a threat with this module: with one of the lowest temperature coefficients in the industry, HS72-18X-550W loses just -0.326% of efficiency for every 1.8°F above 77°F.

Quality and reliability

HS72-18X-550W undergoes various quality checks during the production process and is subjected to serious quality and reliability testing. Manufacturing facilities are highly automated, removing the possibility of human errors. GreenWatts is committed to quality, safety, and dependability to ensure you get the finest.

Reliability and degradation resistance

GreenWatts guarantees slow deterioration over the next 30 years. The performance will decline by no more than 2% during the first year and then by no more than 0.45% every year after that. After the 30 years are over, your modules will retain at least 84.95% of their original performance. This 550 W GreenWatts solar panel also comes with a substantial 25-year product warranty.

A panel that can handle hail, wind and snow

The 1.38" frame made from anodized aluminum alloy and a layer of protective tempered glass make this module resistant to the foulest of weather. The front side of the modules can resist a 5400 Pa load, and the back side 2400 Pa.

Size

89.72" x 44.65" x 1.38"

Weight

71.65 lb

More bifacial solar panels

Authorized GreenWatts Distributor

Authorized Distributor Certificate
  • Genuine Products: You’re getting the real deal, backed by the manufacturer’s warranty.
  • Exclusive Offers: You can access promotions, discounts, or bundles that are only available through authorized distributors.
  • Competitive Pricing: We offer the best prices because we source directly from the manufacturer, with no middlemen driving up costs.
  • Overview
  • FAQ

Power Your Future with GreenWatts Solar Panels

Founded in 2012, GreenWatts has become a key player in the solar energy market, thanks to its dedication to innovation and sustainability. Headquartered in the United States, GreenWatts operates a state-of-the-art manufacturing facility in Brazil with an impressive production capacity of 1.1 GW of solar panels annually. Over the past decade, GreenWatts has grown to become the only solar panel manufacturer in South America that exports panels to the USA. By leveraging cutting-edge photovoltaic technology, GreenWatts delivers efficient, reliable solar solutions that power homes and businesses, driving the global transition to renewable energy.

Key takeaways

  • A Decade of Leadership: GreenWatts has over 10 years of proven reliability and cutting-edge innovation in the solar industry.
  • All-in-One Solar Solutions: Offering more than just panels—GreenWatts provides inverters, racking, and storage for a complete solar setup
  • Built for the Long Haul: With up to 30-year warranties, GreenWatts ensures consistent energy production and durability you can trust.
  • A1 SolarStore Advantage: Enjoy personalized consultations, competitive pricing and expert support for a smooth transition to solar power
Why is GreenWatts a Trusted Leader in the Solar Industry?
GreenWatts has earned its reputation through its commitment to quality and innovation. With over 10 years of experience in the industry, the company has consistently delivered high-performance products to a broad range of customers. GreenWatts stands out by offering CEC-listed, UL, CSA, ISO, and IEC-certified products, ensuring the highest industry standards.

The GreenWatts Advantage: Unmatched Solar Performance

GreenWatts delivers solar solutions that are designed to perform in the real world. Here’s why customers trust GreenWatts for their energy needs:

  • Proven Expertise: With over 10 years of experience in the solar energy industry, GreenWatts has built a strong portfolio of successful projects and satisfied clients
  • Long-Term Warranties: GreenWatts panels come with warranties that extend up to 30 years, providing peace of mind and long-term reliability.
  • Integrated Solutions: GreenWatts goes beyond solar panels, offering a full suite of products, including inverters, racking, energy storage systems, and EV charging stations, making it a one-stop solution for solar energy needs.
  • Certified Quality: The company's Bloomberg Tier 1 status, along with multiple industry certifications, ensures that GreenWatts products meet the highest performance and durability standards.

Top GreenWatts Solar Panels: High-Efficiency Models

GreenWatts offers a range of solar panels designed to meet diverse energy requirements. Here’s an overview of two of their best-performing models:

1. GreenWatts 450W Solar Panel (120 Cell) The GreenWatts 450W panel, with 120 high-efficiency monocrystalline cells, is perfect for residential and commercial installations. Its robust construction and high energy output ensure reliable performance, even in low-light conditions.

SpecificationDetails
Power Output
450W
Cell TypeMonocrystalline, 120 cells
Efficiency
High efficiency, low-light performance
Warranty25-year product warranty

2. GreenWatts 550W Solar Panel (144 Cell) Designed for utility-scale projects, the 550W panel offers unmatched power output and efficiency. It features 144 monocrystalline cells, making it ideal for large-scale energy needs with enhanced durability and long-term performance.

SpecificationDetails
Power Output
550W
Cell TypeMonocrystalline, 144 cells
Efficiency
Optimized for large installations
Warranty30-year product warranty
How can GreenWatts panels help reduce energy bills?
By converting sunlight into efficient, clean energy, GreenWatts panels can significantly reduce your reliance on traditional energy sources, leading to lower energy bills over time.

Why Buy GreenWatts Panels from A1 SolarStore

At A1 SolarStore, we don’t just offer high-quality GreenWatts solar panels—we provide an unparalleled customer experience. When you choose to purchase through us, you benefit from personalized consultation to ensure that the solar panels you select align perfectly with your energy requirements. Our experts assess your needs and guide you to the best solution for your project. Additionally, our close partnership with GreenWatts enables us to offer competitive pricing that fits your budget, alongside flexible financing options that make solar power more accessible to a wider audience.

At A1 SolarStore, we are committed to long-term customer support. We ensure that your solar panels operates at its highest potential by offering ongoing technical assistance, from installation to maintenance.

Where are GreenWatts solar panels manufactured?
GreenWatts operates a production facility in Brazil, combining advanced technology with skilled craftsmanship to produce high-quality solar modules. They have experience in exporting globally, ensuring their products meet international standards.
What is the lifespan of GreenWatts solar panels?
GreenWatts solar panels are designed to last 25+ years, with a linear power output warranty ensuring at least 80-85% efficiency after 25-30 years. Their corrosion-resistant aluminum frame and tempered glass enhance durability against extreme weather conditions.
Do GreenWatts solar panels qualify for federal and state incentives?
Yes, GreenWatts solar panels are eligible for the U.S. Federal Solar Investment Tax Credit (ITC), which provides up to 30% tax credit on installation costs. They also qualify for various state rebates and net metering programs, depending on local policies.
Are GreenWatts solar panels suitable for extreme weather conditions?
Yes, GreenWatts solar panels are designed to withstand harsh environmental conditions. For example, their 450-Watt Monocrystalline Solar Panel is encased in an anodized aluminum alloy frame with high-transmittance coated tempered glass, allowing it to endure temperatures ranging from -40°C to +85°C.
What is the efficiency of GreenWatts solar panels?
GreenWatts' solar panels offer high efficiency rates. For instance, their 550W bifacial solar panel achieves a maximum efficiency of up to 21.3%, making them suitable for utility-scale projects.

More Wholesale Solar Panels

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