Out of stock

Trina 390W Solar Panel 144 cell Bifacial TSM-390DEG15HC.20(II) Portrait Cables Wholesale

$0 /panel
price as of December 10
$0.000 /pw
Solar Loan from 6.99%
All Trina Solar products All 390 Watt Panels



Rated Power Output 390 W
Voltage (VOC)49.6 V
Maximum String Voltage 1500V
Number of cells144
Cell TypeMonocrystalline
Rated Efficiency19 %
Connector TypeMC4 EVO2/TS4
Frame Colorsilver
Dimensions LxWxH79.96. × 39.80 × 1.18 in
Weight69.2 lb
Pallet Qty32
ManufacturerTrina Solar
Manufacturer Part #TSM-390DEG15HC.20(II)
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
Warranty10 year Product Workmanship Warranty / 30 year Linear Power Warranty
Delivery Time 5-7 business days

About product

Trina Solar 390W Duomax Twin is a 144-cell bifacial module for residential and commercial systems. The backside gain reaches up to 25%, depending on the albedo. Half-cut cell design ensures better shading tolerance and improves reliability of a panel.


  • 390W frontside power output
  • 144 cell bifacial monocrystalline module
  • Bifacial gain up to 25%
  • up to 23.8% efficiency with the active backside
  • MC4 EVO2/TS4 Connectors
  • 1500V Maximum system Voltage

Active backside provides high efficiency

The frontside of Duomax Twin puts out 390 Watts of power with 19% energy conversion rate. However, you can get up to 25% more energy from the backside. When it’s working at full capacity, the output of a module reaches up to 488 Watts with 23.8% efficiency.

Half-cut cell technology reduces power losses

Trina Solar engineers use half-cut cell design to reduce the power losses and increase the reliability of a module. Cells become more durable and the risk of hot spots development is lower. What is more, it increases the shading tolerance of a panel.

Ready for harsh weather conditions

Trina Solar panel is resistant to acid and alkaline. It is made to survive harsh weather conditions: wind, rain, hail, tornadoes and hurricanes. The module can withstand 2400 Pa load which is equivalent to 140 mph wind.

Comes with strong warranties

Duomax Twin comes with a 10-year product and workmanship warranty. What is more, there is a 30-year performance warranty. The panel loses no more than 2.5% of its power in the first year and no more than 0.5% in the subsequent years. After 30 years it retains over 83% of its output.


79.96 × 39.80 × 1.18 inches


69.2 lb

Reviews & Questions

  • Reviews (2)
  • Questions (3)
Thank you for all the advice and help along the way!
04/21/2022 12:33 pm
honestly, i found these bifacial panels to be really effective. I’d say that they are a bit more expensive and take a bit more effort to set up, but you really feel the gain in power and they look nicer imo
04/13/2022 09:01 am

Leave a review

the datasheet says 72 cells, but the description says 144??
04/17/2022, 14:58
It’s a 72-cell layout, but the cells are half-cut, so there are 144 of them. The size of a panel is the same as a 72-cell one.
is it chinese?
04/02/2022, 17:11
It is Chinese, yes.
Can i pair 10 of those with 5000W inverter?
04/02/2022, 11:04
Yes, you can