Out of stock

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

price as of June 23
All Canadian Solar products All 320 Watt Panels



Rated Power Output 320 W
Voltage (VOC)37.7 М
Number of cells120
Cell TypeMonocrystalline
Rated Efficiency19.26%
Connector TypeMC4 or MC4 compatible
Backsheet Colorblack
Frame Colorblack
Dimensions LxWxH65.9" x 39.1" x 1.38"
Weight40.8 lbs
ManufacturerCanadian Solar
Manufacturer Part #CS3K-320MS
Operating Temperatures -40 °F to +185 °F
Scope of Application
  • Solar Panels for Boats
  • Solar Panels for Commercial
  • Solar Panels for Home
  • Solar Panels for RV
  • Grid-Tie
  • Off-Grid
Warranty10/25 years see manufacturer

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.
06/17/2020 08:34 pm
I am satisfied with my purchase. The solar panels are efficient, durable, and very easy to clean.
06/08/2020 02:11 pm
Excellent solar modules at a great price. They are very efficient and very durable.
05/02/2020 06:30 pm
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.
04/30/2020 01:16 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.
04/06/2020 07:09 am

Leave a review


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%.
Do you offer discounts?
We do offer discounts for orders of over 50 units. Please contact us for details.
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