Out of stock

REC 400W Solar Panel 132 cell REC400AA-PURE

price as of June 20
All REC products All 400 Watt Panels


Rated Power Output 400 W
Voltage (VOC)48.8 V
Number of cells132
Cell TypeMonocrystalline
Rated Efficiency21.6%
Connector TypeMC4 or MC4 compatible
Backsheet Colorblack
Frame Colorblack
Dimensions LxWxH71.7” x 40” x 1.2”
Weight45 lbs
Pallet Qty33
Manufacturer Part #REC400AA-PURE
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
Warranty20/25 Years See warranty details
Delivery Time 5-7 business days

About product

REC Alpha Pure Black is one of the most advanced and modern panels in the product line of the Norwegian manufacturer. It is a great option for commercial and industrial-scope installations, though you can put it on your residential roof as well. The panel has outstanding design and is protected by strong warranties.


  • 400W output
  • 132 half-cut heterojunction cells
  • Maximum system voltage: 1000V
  • 21.6% efficiency
  • Open circuit voltage: 46.0V
  • MC4 connectors

Great efficiency for reasonable space usage

REC Alpha Pure Black shows 21.6% energy conversion rate — it’s among the highest numbers in the industry for monocrystalline panels at the moment. High efficiency means that you need less space and less modules to build a system to match your energy needs.

Superb performance at high temperatures

Alpha Pure Black is an example of heterojunction cells technology usage: by adding a layer of amorphous silicon to a cell, REC engineers improved the performance of a module at high temperatures. This makes this panel a great choice for hot areas, like Arizona or Texas. The panel loses only 0.26% of its power for every degree after 77°F.

Improved extreme weather and shading tolerance

The REC panel is ready for all kinds of extreme weather conditions. The module can withstand 7000 Pa of the front load and 4000 Pa of the rear load. Half-cut design gives a module better shading tolerance. The module is equipped with 3 bypass diodes to decrease the impact of shading.

Comes with REC ProTrust 25 year warranty

The panel is protected by the triple 25 year warranty for labor, product and performance if it was installed by REC professionals. Otherwise, you still get a 25 year performance warranty and 20 year product warranty. Alpha Pure Black has one of the lowest degradation rates in the industry: only 0.25%. By the end of year 25 you will still have over 92% of initial power output.


71.7 x 40 x 1.2 in (1821 x 1016 x 30 mm)


45 lbs (20.5 kg)

Reviews & Questions

  • Reviews (3)
  • Questions (4)
I’ve been thinking about installing panels for a while now but was worried about my limited space these panels have been a good choice they are really powerful for their compact size.
08/28/2021 05:28 pm
Really worth the price on these panels the power output is really great and completely cut out my power bill.
08/19/2021 07:44 pm
A1 team is really easy to get ahold of and quickly responded to my emails Thank you guys
08/06/2021 03:14 pm

Leave a review

Is this just one solar panel, or two in series?Thanks,N.
02/11/2022, 15:50
It's one panel, yes.
If I order 6 panels how are they shipped? In a wood crate? Does it require signature on delivery?
11/17/2021, 08:48
^ panels will be strapped to wood pallet and covered with carton. Yes signature and inspection is required on delivery.
Do solar panels need servicing?
08/25/2021, 11:07
Solar panels are actually low maintenance just make sure to keep them clean so they harvest the maximum sunlight. Rain will also wash away the dust if your panels are installed at an angle.
Can solar panels be different colors?
08/09/2021, 11:16
Normally solar panels are black with a blue hue to them and the frame colors are usually silver or black.


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