Out of stock

REC 355W Solar Panel 120 cell Alpha Black

price as of July 14
All REC products All 355 Watt Panels


Rated Power Output 355 W
Voltage (VOC)44V
Number of cells120
Cell TypeMonocrystalline
Rated Efficiency20.3%
Connector TypeT4 - MC4 compatible
Backsheet Colorblack
Frame Colorblack
Dimensions LxWxH67.8 x 40 x 1.2 in
Weight43 lbs
Manufacturer Part #REC355AA
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
  • Commercial
  • Grid-Tie
  • Off-Grid
  • Residential
Warranty25 years Manufacture
Delivery Time 5-7 business days

About product

REC 355W Solar Panel 120 cell Alpha Black

REC Solar's REC 355W Solar Panel 120 cell Alpha Blackl is a revolutionary solar panel achieving incredible levels of efficiency, power, and strength. This reliable solar panel is ideal for homes or businesses requiring a very efficient, cost-effective solar panel that provides reliable power output with an aesthetically pleasing full black appearance.

Higher Efficiency

Higher module conversion efficiency up to 20.3%. Higher energy yield with lower operating temperatures.

Enhanced Frame Design

REC’s unique frame design: The 30 mm thin frame construction allows more panels per pallet, an easy installation and allows the Alpha to withstand snow loads of 7000Pa.

Quality and Reliability

REC’s pioneering and award-winning ‘Twin Panel’ design: Introduced in 2014, this delivers demonstrably better performance in shaded conditions.

Product warranty

25-year product warranty on installations by REC Solar Professionals (otherwise 20 years), and a 25-year power output warranty.

Product details

  • Open Circuit Voltage (V) 44
  • Shipping weight 43 lbs
  • Frame Color: black
  • Shipping dimensions: 67.8 x 40 x 1.2 in

Reviews & Questions

  • Reviews (5)
  • Questions (2)
A1 solar was a pleasure to do business with. The guys returned my emailed questions with a phone call or email back almost immediately every time!
01/24/2021 11:26 am
What can I say other than the best quality of product and even more important. The best support that one could wish for when choosing to take on a solar project of any size.
12/05/2020 08:13 pm
I just wanted to let you know how happy I am with the system that I bought from you . When it arrived, every single component was there. I recommend your company every chance I get.
Orion L.
12/02/2020 12:14 pm
My experience was amazing while working with this company and yours will be too! They put the SOUL in SOLAR……..
10/20/2020 09:05 am
If you want to work with a solar company that honestly wants to help you, A1 Solar store come with my highest recommendation.
Ger M.
10/18/2020 04:35 pm

Leave a review

What size solar energy system should I get?
12/17/2020, 10:47
You can use our solar system size calculator. https://a1solarstore.com/solar-calculator.html
Do my solar produce power when the sun isn't shining?
12/17/2020, 10:46
No. Solar panels are sun depended.No. Solar panels are sun depended.


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