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Canadian Solar 445W Solar Panel CS3W-445MS

price as of February 01
All Canadian Solar products All 445 Watt Panels


Rated Power Output 445 W
Voltage (VOC)48.9 V
Cell number
  • 144 cell
Cell TypeMonocrystalline
Rated Efficiency20.1%
Connector TypeMC4 or MC4 comparable
Backsheet Color
  • white
Frame Color
  • silver
Dimensions LxWxH83.0 X 41.3 X 1.57 in
Weight54.9 lbs
ManufacturerCanadian Solar
Manufacturer Part #CS3W-445MS
Operating Temperatures -40℃ to + 85℃
Scope of Application
  • Solar Panels for Boats
  • Solar Panels for Commercial
  • Solar Panels for Home
  • Solar Panels for RV
  • Grid-Tie
  • Off-Grid
Warranty12-year warranty extendable 25 years
Delivery Time 5-7 business days

About product

The HiKu PV module is a new solar panel from Canadian Solar. It features improved cell design and better energy harvest from a square foot. It’s a high-output module for commercial and industrial projects. 


  • 445W power output
  • 20.1% efficiency
  • 144 half-cut cells
  • MC4 connectors
  • 1000V or 1500V max. system voltage

Over 20% efficiency with PERC and half-cut cell design

The HiKu panel gives out 445 watts of power with a 20.1% conversion rate. High efficiency was achieved by implementing Passivated Emitter Rear Cell technology and half-cut cell design which both contributed to increasing the amount of sunlight that a solar cell gets. High power makes this panel a good choice for building installations of a greater scale. 

Better durability and shading tolerance

The Canadian Solar panel has 144 half-cut cells: half-cut cell design increases mechanical tolerance of a panel, prevents hot spots development and decreases the impact of microcracks. The shading tolerance of a panel also rises, because the module is split in two independent halves. The shading of a cell in one half doesn’t affect the other one.

Ready for any weather conditions

Canadian Solar panels are known to perform well in low-light conditions: on cloudy days and in the winter and the fall. They aren’t afraid of strong winds, tornadoes and hurricanes. The panels are capable of withstanding 5400 Pa snow load up and 3600 Pa wind load.

Comes protected by warranties

The Canadian manufacturer provides strong warranties to ensure that their customers have a good solar experience throughout the years. The HiKu comes with a 12-year warranty on materials and workmanship and a 25-year performance warranty. 


83.0 X 41.3 X 1.57 in


54.9 lbs

Reviews & Questions

  • Reviews (3)
  • Questions (3)
Was waiting for that to arrive on the market!
01/18/2022 05:27 pm
I was a bit discouraged when I discovered that the panels are actually made in China, but maybe I was prejudiced! They are top quality to me, do really well and have really decreased my expenses in these trying times.
01/12/2022 09:06 am
I’m having a good time with these panels. The output is great and weather is not much of an issue. The installer did a great job getting all the papers and so far i’m really happy with the investment.
12/23/2021 01:25 pm

Leave a review

what papers do i need to install these
Requirements differ from state to state. Your installer should know all the details.
will they work in an off-grid setting?
These panels can be used in off-grid systems, yes.
If i get 3 of these, how much for a delivery?
Unfortunately, the minimum order size is 6 modules.

Ask a question


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