Canadian Solar 305W CS6K-305MS Solar Panel is available online at a low price at A1 Solar Store
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Canadian Solar CS6K-305MS 305W Solar Panel

Cell number  —  60 cell
Price per Watt  —  $0.61
Rated Power Output  —  305 W
Voltage (VOC)  —  39.9V
Cell Type  —  Monocrystalline
Warranty  —  10/25 years see manufacturer

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Canadian Solar CS6K-305MS 305W Module

Canadian Solar's newest 60 cell Mono-PERC SuperPower CS6K-305MS module has a power output of 305W and a 5 bus bar cell design. The Mono-PERC cells in this module, significantly improve efficiency and reliability. PERC stands for Passivated Emitter Rear Contact. This refers to the dielectric layer on the back of a PERC solar cell which helps to reflect light that passes through the cell and then back into the cell to generate more electrons. This process is also known as backside passivation. The new technology also offers superior low irradiance performance in the morning, evening and even on cloudy days, increasing the energy output of the panel and the overall yield of the solar system.

Higher Efficiency 18.63%

Great power output and greater energy yields. Produces 11% more power than conventional modules. Excellent performance at low irradiance of up to 97.5%.

High Efficiency at High Temperatures

This module features a lower temperature coefficient improving the module's per watt actual power output compared to standard mono solar panels, reducing Light Induced Degradation (LID) by over 30%. Also, the module provides a high energy yield at low NOCT = 45°C.

Quality and Reliability

Canadian Solar’s many tests guarantee extreme quality assurance. This module received 359 Quality Control Points.

  • Electroluminescence testing: A 100% EL screen test to eliminate cell or module defects
  • Testing and analysis: Performance reliability, mechanical and chemical tests of raw materials and components
  • Machine testing: Advanced automatic equipment in testing and manufacturing process
  • Lab testing: The first module manufacturer-owned photovoltaic reliability testing laboratory to meet ISO/IEC 17025 standards
  • Cleaning: 100% module visual inspection and clean before packing
  • Increased System Reliability

Low Degradation

Low 0.7% annual degradation rate after an initial first-year degradation of 3% that results in a performance guarantee no less than 80% of the nominated power by year 25.

Enhanced Frame Design

Strong 35mm robust frame increases durability and strength and being able to hold a heavy snow load up to 6000 Pa and wind load up to 4000 Pa. Added ammonia, salt mist and blowing sand resistance makes this module an excellent choice for installations at seaside, farms and desert environments.

10 Year Product and 25 Year Performance Warranty

This module comes with a 10 year product warranty on materials and workmanship and a 25-year performance warranty.


Condition New
Cell number
  • 60 cell
Connector Type T4 series
Dimensions LxWxH 65" x 39.1" x 1.38"
Manufacturer Canadian Solar
Manufacturer Part # CS6K-305MS
Model Canadian Solar 305W CS6K-305MS
Operating temperatures -40 °F to +185 °F
Rated Efficiencies 97.5%
  • Grid-Tie
  • Off-Grid
Weight 40.1 lbs
Price per Watt 0.61
Rated Power Output 305
Voltage (VOC) 39.9V
Cell Type Monocrystalline
Warranty 10/25 years see manufacturer


These panels not only power efficient but also very cost efficient. I was able to get fewer panels to provide me with energy I needed thus saving a lot.
I live in California, in the high desert, and it gets very hot here. i was concerned about my power generation during heat waves but, fortunately, the modules do not seem to be affected by high temperatures. I am very pleased with the power production.
The installer recommended Canadian Solar to me, mainly because they combine affordable price and high quality. I am glad I listen and got them. Very nice looking panels that seem very durable.
I trusted my installer that these panels would work for us and I am so glad I did. I am impressed how efficient they are.
This was an easy choice for me. Canadian Solar is known for their highly efficient, durable and quality panels. I found a good deal on this website and saved some money too.
These modules have been performing great since the day I had hem installed. No complaints.
I wanted brand name solar panels but did not want to spend more than I had to. Canadian Solar was a perfect choice for me. Great panels that work and look perfect.
It has been almost a year since I installed these modules. I love them. Great energy output, no maintenance and no pollution!
Write a review



Alisha 0 03/17/2020
Do solar panels require maintenance? Can I wash my solar panel?
Thomas Klein 0 03/07/2020
How many panels do I need?
Riley B. 0 02/19/2020
Can I connect and charge my solar panel battery directly with the solar panel?


Canadian Solar 305W CS6K-305MS Solar Panel (CS6K-305MS.pdf, 1,159 Kb) [Download]


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