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Canadian Solar 320W PV Module 120 cell CS3K-320MS

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Canadian Solar 320W PV Module 120 cell CS3K-320MS

Name: Canadian Solar 320W PV Module 120 cell CS3K-320MS
Brand: Canadian Solar
SKU: 110-1239
Availability: OutOfStock
Rating: 5.00 (5 reviews)

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(5)

Q&A

SpecificationCompare
Rated Power Output 320 W
Voltage (VOC)37.7V
Number of cells120
Cell TypeMonocrystalline

All Canadian Solar products All 320 Watt Panels

Attachments

CS3K-320MS .PDF

Specification

Length	65.9in
Width	39.1in
Rated Power Output	320 W
Voltage (VOC)	37.7V
Number of cells	120
Cell Type	Monocrystalline
Rated Efficiency	19.26%
Connector Type	MC4 or MC4 compatible
Backsheet Color	black
Frame Color	black
Dimensions LxWxH	65.9 x 39.1 x 1.38 in
Manufacturer	Canadian Solar
Manufacturer Part #	CS3K-320MS
Operating Temperatures	-40 °F to +185 °F
Scope of Application	Solar Panels for Boats Solar Panels for Home Solar Panels for RV
Use	Grid-Tie Off-Grid
Warranty	10/25 years see manufacturer
Delivery Time	WEST COAST SHIPPING ONLY

About product

Canadian Solar's KuPower CS3K 320W solar panels are 120 monocrystalline PERC half cells modules. Ku CS3K 320W module features efficiency of up to 19.26% and shows excellent performance in low irradiance conditions such as early morning, evenings and overcast conditions. The anodized aluminum frame comes in black color and the back sheet comes in white for a striking aesthetics of the Canadian Solar 320w module.

Main Features:

High module efficiency up to 19.26%
Low power loss in cell connection
Low power loss in cell connection
Better shading tolerance
More power output thanks to low NMOT (Nominal Module Operating Temperature): 43 ± 3°C

High efficiency helps to save space

Canadian Solar 320 watt panel efficiency reaches 19.26%. High conversion rate helps homeowners to save roof space when building a powerful system.

Great performance in any weather conditions

Canadian Solar 320 watt panels are famous for doing extremely well on cloudy days. The panels have a low temperature coefficient (Pmax): -0.37%/°C, which shows they have lose little power at high temperatures as well

Reliable and long-longlasting

The module is made to withstand 6000 Pa snow loads and 4000 Pa wind load, according to the Canadian Solar 320 spec sheet. Shingle cell design lowers risk of microcracks

Comes with solid warranties

Canadian Solar panels are UL1703 certified, CEC Listed and are fully complying to IEC, TUV, UL testing standards. Canadian CS3K panels come with a 25-year linear power output warranty and a 10-year product warranty on materials and workmanship.

Canadian Solar, 320W PV Module, PV Wire, T-4-MC-4 comparable, 35mm Black Frame on White Backsheet, BoW, 120 ½ Cells, 5BB Mono-PERC, 20A Fuse, 1000VDC, 298.1 PTC, CS3K-320MS

Reviews & Questions

Reviews (5)
Questions (0)

It was a good value for the money for me. The panels are much cheaper than some of the same Tier competitors' modules but much more efficient.

Marc

06/17/2020 08:34 pm

I am satisfied with my purchase. The solar panels are efficient, durable, and very easy to clean.

Vince

06/08/2020 02:11 pm

Excellent solar modules at a great price. They are very efficient and very durable.

David

05/02/2020 06:30 pm

Canadian Solar is one of the best solar manufactures and that is why I choose their panels. So far they are performing very well and cause no problems at all.

Loyd

04/06/2020 07:09 am

These panels exceeded my expectations on cloudy days. It seems they try to make electricity with any amount of sunlight. I am very impressed with their performance.

Patrick

02/20/2020 01:16 pm

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Overview
Articles
FAQ

Canadian Solar Panels for Sale

Canadian Solar is one of the most recognized names in the global solar panel market. Known for its impressive mix of affordability, efficiency, and long-term reliability, Canadian Solar panels have earned their place as one of the most popular choices for homeowners and businesses alike. From 400W to 550W models, these panels offer solid power outputs and are backed by excellent warranties.

Founded in 2001, Canadian Solar Inc. (NASDAQ: CSIQ) has grown to become one of the world's largest solar technology companies with over 87 GW of solar modules shipped globally. With manufacturing facilities across Asia and a strong presence in North America, the company has established itself as a leading Tier 1 manufacturer serving residential, commercial, and utility-scale markets in over 160 countries worldwide.

Why Choose Canadian Solar Panels?

🏆 Tier 1 Manufacturer

Leading global solar manufacturer with over 25 GW production capacity across multiple facilities, exporting to 160+ countries with proven financial stability and bankability

⚡ Advanced Technology

Half-cell PERC technology with up to 21.6% efficiency and excellent low-light performance with <0.5% annual power degradation ensuring long-term reliability

💰 Cost Advantage

Industry-leading price-to-performance ratio at $0.45-$0.85/W with excellent value proposition and competitive system pricing at $2.50-$3.50/W installed

🛡️ Superior Warranty

25-year linear power warranty + 25-year product warranty exceeding industry standards with comprehensive coverage and global support network

"Canadian Solar's 400W panel gives us exceptional value at $0.58/W—customers love the Tier 1 quality and proven reliability, and we appreciate the advanced PERC technology and robust build quality."

— Terry Shin, Mountain West Solar (UT, 2025)

Canadian Solar Panel Models: Powering Homes & Businesses

Canadian Solar 400W Solar Panel

Efficiency: Up to 21.1%
Ideal for: Residential systems and rooftops with limited space
Warranty: 25 years product and performance
Features: Enhanced durability and excellent low-light performance

→ Check 400W Panels

Canadian Solar 450W Solar Panel

Efficiency: Up to 21.6%
Ideal for: Larger homes, small businesses, and commercial setups
Warranty: 25 years product and performance
Features: Durable and high-performing, ideal for locations with consistent sunlight.

→ Check 450W Panels

Canadian Solar 550W Solar Panel

Efficiency: Up to 21.0%
Ideal for: Commercial installations and large residential solar setups
Warranty: 25 years product and performance
Features: Designed to produce more power with fewer panels, making it perfect for large-scale energy generation needs.

→ Check 550W Panels

Canadian Solar 700W Solar Panel

Efficiency: Up to 20.8%
Ideal for: Commercial and industrial-scale solar power projects
Warranty: 25 years product and performance
Features: Maximizes power output while reducing system complexity by needing fewer modules.

→ Check 700W Panels

Series	Power	Efficiency	Warranty	Ideal use-case
400W	400W	21.1%	25 years	Space-limited roofs
450W	450W	21.6%	25 years	Larger homes, businesses
550W	550W	21.0%	25 years	Commercial & large homes
700W	700W	20.8%	25 years	Commercial & industrial

Certifications & Testing

Feature	Certification/Standard	Benefit
PID-free design	TÜV Rheinland IEC 62804	1% annual degradation cap
Safety & construction	IEC 61215/61730 (2023 ed.)	Global code compliance
Quality system	ISO 9001/14001/45001	Robust QA/HSE culture
Bifacial energy modeling	NREL bifacial PV performance study	Predictable rear-side gain

"We have a customer who saved 20% over competing brands by going with Canadian Solar 400W panels for their home system. The performance is exceptional, and the savings speak for themselves."

— John T., Solar Installations Inc.

CertainTeed Solar vs. Canadian Solar: Which is Better for Your Project?

Feature	Canadian Solar	CertainTeed Solar
Efficiency	Up to 21.6%	Up to 20.5%
Price per Watt	$0.45 - $0.85	$0.70 - $0.75
Warranty	25 years	25 years
Made In	China/Canada/Vietnam	USA

Customer Reviews of Canadian Solar Panels

"After comparing several brands, I decided on Canadian Solar for my 8 kW residential system. The panels were easy to install, and I've seen a steady return on my energy savings over the past year."

— Mark J., Homeowner, Texas

"We installed Canadian Solar's 550W panels for a commercial warehouse. The energy output has been fantastic, and the warranty gives us peace of mind. Highly recommend them for large-scale systems."

— Sarah W., Business Owner, Florida

Frequently Asked Questions

Are Canadian Solar panels Tier 1?

Yes, Canadian Solar is recognized as a Tier 1 manufacturer by Bloomberg New Energy Finance, indicating strong financial stability and proven bankability in the solar industry.

Where are Canadian Solar modules made?

Canadian Solar panels are manufactured in China, Canada, and Vietnam, with stringent quality standards at each facility.

What is the Canadian Solar warranty?

Canadian Solar offers a 25-year linear power warranty and a 25-year product warranty on their panels.

Can I buy Canadian Solar panels in the USA?

Yes, Canadian Solar panels are available throughout the USA and are eligible for domestic content incentives when installed with other U.S.-made components.

Ready to Power Your Project?

Get premium Canadian Solar panels with Tier 1 quality at competitive prices. Advanced PERC technology, 25-year warranty, and proven reliability.

Shop Canadian Solar Panels

What makes Canadian Solar panels a good choice?

Canadian Solar is a Tier 1 solar panel manufacturer known for its high efficiency, durability, and affordability. The company offers a wide range of monocrystalline, polycrystalline, and bifacial panels, making them suitable for residential, commercial, and utility-scale projects.

What is the warranty on Canadian Solar panels?

Canadian Solar provides a 12- to 25-year product warranty, depending on the model. Additionally, their linear performance warranty guarantees at least 84.8% of the original output after 25 years for most of their modules.

Where are Canadian Solar panels manufactured?

Despite the name, Canadian Solar is a global company headquartered in Canada, but its panels are manufactured in China, Canada, Vietnam, and other locations. The company follows strict quality control and testing standards to ensure durability and performance.

What types of solar panels does Canadian Solar offer?

Canadian Solar produces a variety of high-efficiency monocrystalline (HiKu, HiDM) and polycrystalline solar panels. Their bifacial modules can generate power from both sides, increasing total energy production. They also offer TOPCon and Heterojunction Technology (HJT) panels for even greater efficiency.

Are Canadian Solar panels good for extreme weather conditions?

Yes, Canadian Solar panels are designed to withstand high wind and snow loads (up to 5400 Pa for snow and 4000 Pa for wind). They are also resistant to salt mist, ammonia, and PID degradation, making them ideal for various climates, including coastal and desert environments.

Are Canadian Solar panels compatible with battery storage systems?

Yes, Canadian Solar panels work well with most solar battery storage systems, including lithium-ion and lead-acid batteries. They can be integrated into off-grid and hybrid solar setups when paired with a compatible inverter.

Are Canadian Solar panels Tier 1?

Yes, Canadian Solar is a Tier 1 manufacturer, meaning it has a strong financial background and a proven track record of producing high-quality, reliable solar panels. The company has been a leader in the solar industry for over 20 years and is consistently ranked among the world's top solar panel manufacturers.

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

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