Out of stock

Canadian Solar 345W Solar Panel 120 cell HiKu CS3L-345

price as of July 20
All Canadian Solar products All 345 Watt Panels


Rated Power Output 345 W
Voltage (VOC)39.8V
Number of cells120
Cell TypeMonocrystalline
Rated Efficiency18.7%
Connector TypeT4 - MC4 compatible
Backsheet Colorblack
Frame Colorblack
Dimensions LxWxH69.5" x 41.3" x 1.38"
Weight45.2 lbs
ManufacturerCanadian Solar
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
Warranty12-year warranty extendable 25 years
Delivery Time 5-7 business days

About product

Canadian Solar 345W Solar Panel is an all-black high density mono PERC module, which offers great power output. The module shows an efficiency of up to 18.7%, which is achieved due to higher light absorption and reduced energy loss in cable. Canadian Solar CS3L-345 HiKu is an optimal solution for residential rooftop installations.

  • 345W Power Output
  • 18.7% Module Efficiency
  • 120 Cell, Monocrystalline
  • MC4 or T4 series Connector
  • Half-cut Cell Technology
  • Better shading tolerance
  • Wide operating temperature range
  • Extreme weather resilience
  • Aesthetic appearance

Higher Efficiency of up to 18.7%

Canadian Solar CS3L-345 HiKu modules have a higher than average efficiency of 18.7%, which is achieved by a higher light absorption, innovative module design, and better shading tolerance. With a smaller cell size CS3L-345 HiKu panels are also less vulnerable to the energy losses associated with excessive heating.

Extreme Weather Resistance

Canadian Solar panels are designed to work well even under extreme weather conditions, being able to withstand heavy snow load of up to 5400 Pa and a wind load up to 3600 Pa. Operating temperature range is -40°F ~ 185°F.

Easy Mounting

Reserved mounting holes allow for easier installation. Cables are optimised to be just the right length.

High Reliability

Canadian Solar modules feature lower internal current and lower hot spot temperature, which adds to their outstanding reliability. Cell crack risk has been limited in small regions.

PID Resistant

A low annual degradation rate of 0.55% guarantees no less than 84.8% of power output by year 25.

12 Year Product and 25 Year Performance Warranty

Canadian Solar 345-watt Panel goes with an industry-leading 25-year performance warranty independently backed by Powerguard’s third-party insurance and a 12-year product warranty.


69.5” x 41.3” x 1.38“


45.2 lbs

Reviews & Questions

  • Reviews (3)
  • Questions (3)
I had a very smooth experience with a1solarstore — their staff helped picking the panels and gave some advice on the installation. I picked this model because it’s cloudy around here. They barely lose power even when it’s raining.
07/17/2021 09:07 pm
I used the calculator to plan the system for my home. panels arrived in four days. Two were broken, but I contacted the store and they replaced the panels for me, so we are cool. It’s three months, the panels are quite powerful and I'm satisfied.
06/18/2021 10:17 am
I like this model. The pallet arrived in 6 days, the installation was very easy. So far everything goes well.
05/21/2021 12:46 pm

Leave a review

What if i don’t like the panel? Can I return it as is?
07/20/2021, 02:51
Merchandise, except for products that were specially ordered and/or assembled for the customer, may be returned within 30 days of the receipt of the product. However, there is a 15% restock fee for domestic returns. We have the right to refuse a refund, if the items are returned in a non-resalable condition.
I’m a little confused, is this for residential or commercial systems?
Nick N
06/21/2021, 13:50
Canadian Solar 345W Panel is suited both for residential and commercial installations.
who does the shipping?
06/08/2021, 09:48
We cooperate with best carriers like XPO Logistics, FedEx Freight and FedEx Ground


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