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Out of stock

Silfab 420W Solar Panel 66 Cell SIL-420-BG Assembled in USA

(107 ratings)
Q&A

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Customer reviews & Questions

Verified buyer reviews
Customer Reviews
  • Reviews (107)
  • Questions (2)
aaron
04/11/2025
installed 12 of these myself. mounting holes lined up perfect.
customer\_jake
01/08/2025
love the warranty time will tell but they’re cranking out power now
Tony Hall
11/04/2024
They look real nice all black n slick. Had em hooked up in a day.
tommy
08/01/2025
anti reflective glass?
A1 SolarStore
Yes, high-transmittance tempered glass with anti-reflective coating.
michael p.
07/27/2025
mounting holes count
A1 SolarStore
The panel uses 4 mounting holes and includes dedicated grounding holes; follow the pattern shown in the mech drawing.

Specification

Length73.39in
Width40.51in
Rated Power Output 420 W
Voltage (VOC)46.36V
Maximum String Voltage 1000V
Number of cells66
Cell TypeMonocrystalline
Rated Efficiency21.9%
Connector TypeMC4 from Staubli
Backsheet Colorblack
Frame Colorblack
Dimensions LxWxH73.39 x 40.51 x 1.38 in
Weight45.86 lbs
Pallet Qty27
ManufacturerSilfab
Manufacturer Part #SIL-420-BG
Operating Temperatures −40°F to +185°F
Scope of Application
  • Solar Panels for Boats
  • Solar Panels for Home
  • Solar Panels for RV
Use
  • Commercial
  • Grid-Tie
  • Off-Grid
  • Residential
Warranty25-year product workmanship warranty and 30-year linear power performance guarantee

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FAQ

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%.
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

About product

Among the newest offerings of Silfab, SIL-420-BG is part of the Silfab Elite series. These panels use state-of-the-art technology to achieve high efficiency and dependability. The Passivated Emitter Rear Contact (PERC) technology ensures excellent power output. This solar cell type employs an additional reflective layer to absorb more sunlight.

The efficiency of this model reaches 21.9% — well above the market’s average. Silfab provides a 25-year product workmanship warranty. Stable power output is also guaranteed —linear power performance guarantee will protect you for 30 years.

  • 420 W power output
  • 66 PERC cells
  • 21.9% efficiency
  • 1000 V DC maximum system voltage
  • MC4 from Staubli connectors
  • 25-year product workmanship warranty and 30-year linear power performance guarantee

Increased power and efficiency

PERC technology improves on an already high efficiency of 21.9 percent. The manufacturer created an efficient and highly durable model by adding a robust PID resistance and unique glass lamination on top. SIL-420-BG produces 420 W of power under standard test conditions.

Heat-resistant performance

This module makes the heat less dangerous since it has one of the lowest temperature coefficients in the market, losing just -0.377% of efficiency for every 1.8°F over 77°F.

Quality and reliability

SIL-420-BG receives multiple quality checks throughout the manufacturing process and is subject to stringent quality and reliability testing. The manufacturing facilities are highly automated, eliminating the risk of human error. Silfab is dedicated to quality, safety and reliability to ensure you get the very best.

Low degradation for increased lifespan

The amount of power output loss experienced by these panels during the first year of operation will not exceed 2%. The average yearly power drop from the second to the 30th year will not surpass 0.3%. After 30 years, the module will still produce more than 89.3% of its initial output.

A panel that can handle hail, wind, and snow

The 1.38" frame, built of black anodised aluminium and a layer of protective tempered glass, makes this module weather-resistant. Both the front and the back sides of the modules can withstand a 5400 Pa load.

Size

73.39" x 40.51" x 1.38"

Weight

45.86 lb

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