Solenso NRJ--W120SS  390
Solenso NRJ--W120SS  390
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Solenso NRJ--W120SS 390

Solenso NRJ--W120SS 390

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9+ sold

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Unlimited lifetime support, always available.

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Solenso NRJ-W120SS 390W Bifacial HJT Monocrystalline Solar Panel

Model NRJ-W120SS 390 | HJT Bifacial | 120 Half-Cut Cells | Bifacial | 1500V System Voltage

390 Wp
Max Power Output
21.4%
Module Efficiency
120
N-Type TOPCon

Product Overview

The Solenso NRJ-W120SS 390W bifacial HJT monocrystalline solar panel is designed for high efficiency rooftop and commercial systems. This advanced module uses heterojunction half-cut cells and bifacial technology to deliver more energy from the same surface area. With module efficiency up to 21.4 percent, it suits projects where space is limited and performance is critical. The panel operates reliably across a wide temperature range, from minus 40 to plus 85 degrees Celsius. Its low temperature coefficient supports strong output in hot climates and on bright summer days. Bifaciality above 90 percent allows the rear side to capture reflected light for higher yields. The NRJ-W120SS 390W solar panel is an excellent choice for installers and project owners seeking stable long term production. It combines premium materials, robust mechanical design, and extended performance warranties for dependable clean energy.

Key Benefits

High power density for tight spaces: With a rated power of 390 Wp and efficiency of 21.4 percent, this module delivers strong output even on compact roofs or constrained commercial arrays. Systems can reach target capacity with fewer panels and lower mounting hardware needs.

Bifacial HJT technology for higher yields: Heterojunction cells with bifacial design capture light from the front and rear sides. This boosts energy generation on bright surfaces such as white roofs, concrete, snow, or reflective ground coverings. Bifaciality above 90 percent supports excellent backside performance.

Outstanding performance in heat and low light: A low power temperature coefficient of -0.26 percent per degree Celsius limits output losses on hot days. The module also provides strong weak light performance, producing energy during early mornings, cloudy conditions, and late afternoons.

Durable construction for demanding sites: The panel uses 2 millimeter anti reflection coated front glass and robust anodized aluminium framing. An IP67 junction box and high quality POE encapsulant help protect cells against moisture, dust, and potential induced degradation over time.

Long term reliability and extended warranties: The NRJ-W120SS series offers 20 years product workmanship warranty and 30 years linear power warranty. Degradation is tightly controlled, with 99 percent output in year one and only 0.37 percent annual decline through year thirty.

How It Works

This Solenso NRJ-W120SS 390W bifacial HJT monocrystalline solar panel converts sunlight into usable DC electricity through high efficiency silicon cells. Each 166 by 83 millimeter cell combines crystalline silicon with thin amorphous silicon layers to reduce losses and enhance voltage. The cells are arranged in a 120 half cut layout to lower resistive losses and improve shade tolerance. When sunlight hits the front glass, photons energize electrons within the cells and create an electric current that flows through the busbars and output cables. At the same time, the bifacial rear side captures reflected light from the ground or roof surface, adding extra energy production. The generated DC power is then sent to a compatible inverter, which converts it into AC electricity for homes, businesses, or export to the grid.

HJT bifacial cell structure: Heterojunction technology combines crystalline wafers with thin amorphous silicon layers on both sides of the cell. This structure reduces recombination losses and helps maintain higher voltages under real operating conditions. Because both sides are active, the panel can harvest energy from direct and reflected light.

Half-cut 120 cell configuration: The module uses 120 half cut cells instead of 60 full size cells to lower current in each string. Reduced current decreases resistive losses in the cell fingers and ribbons, improving efficiency and power output. The layout also enhances performance under partial shading because separate sections of the module can continue working.

Optimized thermal and electrical behavior: With a nominal operating cell temperature of 44 degrees Celsius plus or minus two, the panel remains stable in typical field conditions. Low temperature coefficients for Pmax, Voc, and Isc help preserve performance as temperatures rise. When paired with a quality MPPT inverter, the system continually tracks the maximum power point around 37.91 volts and 10.3 amps at STC.

Technical Specifications

Technology Bifacial HJT monocrystalline, half-cut solar module
Power range (series) 375 Wp to 400 Wp NRJ-W120SS series
Rated power Pmax (STC) 390 Wp
Power tolerance 0 to +1 percent, factory positive sorting
Module efficiency 21.4 percent at STC
Maximum power voltage Vmpp 37.91 V (STC)
Maximum power current Impp 10.3 A (STC)
Open circuit voltage Voc 44.48 V (STC)
Short circuit current Isc 10.62 A (STC)
Bifaciality 90 percent ± 5 percent
Nominal operating cell temperature (NOCT) 44 °C ± 2 °C
Operating temperature range -40 °C to +85 °C
Temperature coefficient of Pmax -0.26 percent per °C
Temperature coefficient of Voc -0.24 percent per °C
Temperature coefficient of Isc +0.04 percent per °C
Maximum system voltage 1500 V DC (IEC)
Maximum series fuse rating 20 A
Module dimensions (H × W × D) 1755 × 1038 × 30 mm
Weight 23.5 kg
Cell type and size 120 HJT cells, 166 × 83 mm
Front glass 2.0 mm anti reflection coated solar glass
Back glass 2.0 mm white ceramic patterned PV glass
Encapsulant POE (polyolefin elastomer)
Frame material Anodized aluminium alloy frame
Junction box protection IP67 rated junction box
Connector type MC4 compatible connectors
Output cable 4 mm², 200 mm length, customizable on request
Mechanical load capacity 5400 Pa front snow load, 2400 Pa rear wind load
Safety class and fire rating Safety Class II, Fire Rating Class A

Certifications & Compliance

Certifications: Certified for high mechanical loads up to 5400 Pa snow and 2400 Pa wind, designed to meet international IEC safety and performance standards for crystalline PV modules.
Inverter Compatibility: Suitable for modern grid tied inverters and hybrid inverters with 1500 V DC string designs, using MC4 compatible connectors and standard IV characteristics.
Environmental: Engineered for -40 °C to +85 °C environments with IP67 junction box, durable dual glass construction, and strong resistance to PID and moisture ingress.
Warranty: 20 year product workmanship warranty plus 30 year linear performance warranty with 99 percent output in year one and only 0.37 percent annual degradation thereafter.

Documentation

Product Datasheet (PDF)

● Available | Contact us for lead time and pricing

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Customer Success Stories

Troy P

EG4 off-grid base kit, Happy with my purchase.

This is the first stage of my three planned purches. I got the eg4 inverter 6000 XP base kit with six 400 watt panels and the two server rack batteries. Did a little online research and followed the instructions and it got set up without any issues. Right now I'm just running it in my garage on a single outlet and have been running dual 750 watt water distillers with it. Once I get the second inverter and a bunch more panels and batteries, I plan on attaching it to my subpanel in my house that has my lights and outlets and appliances on it. Then I'll get a soft start for my AC and blower and run it on my main panel.

Jacob B

Easy Process, Genuine Support

Trying to pick the correct solar system for your needs can be very technical and frustrating. I wanted to thank Yvhan and the Portlandia Electric supply team for their patience and helpful attitudes through multiple calls. I feel like we were able to narrow it down to what worked for me and my family. My system works great and I couldn't be happier to have picked Portlandia Electric Supply.

Patrick B

Off Grid Solar Purchase

I wanted to get an offgrid solar system for years but didn’t know where to start. I found Portlandia Electric Supply on Facebook and decided to submit a quote. Within 24 hours I had a custom proposal that was almost half the price of the companies I had previously got quotes from. My wife and I decided to order online and the kit came in a timely manner and it was an easy install. Great company to work with!

James Martin

Highly Recommend

I would like to take the time to express the outstanding service that I was provided with by Portlandia Electric Supply. They provided me with all the answers to my questions, and after reviewing our quote over the phone I felt comfortable proceeding to order my kit. It’s exactly what I needed and they were there to help us over the phone when we had questions installing it. I highly recommend others in need to choose Portlandia Electric Supply.

Brian H

Solar Kit for Mobile Work Van

As a professional videographer, I needed reliable power on the go.Portlandia Electric Supply Delta Pro and roof-mounted panels were the perfect solution. Setup was easy, and the kit included everything needed. The Delta Pro powers my cameras, lights, laptop, and a small fridge with impressive battery capacity.

Keith S

Best Tech Support

You folks have been wonderful guiding me through the ins and outs of going solar. Plus your tech guys Rod and Nelson are the absolute best. They explained all the different aspects of inverters, batteries and how to keep them in top condition. Too much more to put here… but no other company has the 100% tech support you provide for your customers!

Coll A

Great Experience

My experience with Portlandia Electric Supply has been excellent. Before the sales, they answered all my questions to assure that I got what I needed. After the sales they continued to support me with answers and help. I had a warranty issue with a unit, and it was handled as well as possible. I would recommend them to anyone looking to go solar.

Troy P

EG4 off-grid base kit, Happy with my purchase.

This is the first stage of my three planned purches. I got the eg4 inverter 6000 XP base kit with six 400 watt panels and the two server rack batteries. Did a little online research and followed the instructions and it got set up without any issues. Right now I'm just running it in my garage on a single outlet and have been running dual 750 watt water distillers with it. Once I get the second inverter and a bunch more panels and batteries, I plan on attaching it to my subpanel in my house that has my lights and outlets and appliances on it. Then I'll get a soft start for my AC and blower and run it on my main panel.

Jacob B

Easy Process, Genuine Support

Trying to pick the correct solar system for your needs can be very technical and frustrating. I wanted to thank Yvhan and the Portlandia Electric supply team for their patience and helpful attitudes through multiple calls. I feel like we were able to narrow it down to what worked for me and my family. My system works great and I couldn't be happier to have picked Portlandia Electric Supply.

Patrick B

Off Grid Solar Purchase

I wanted to get an offgrid solar system for years but didn’t know where to start. I found Portlandia Electric Supply on Facebook and decided to submit a quote. Within 24 hours I had a custom proposal that was almost half the price of the companies I had previously got quotes from. My wife and I decided to order online and the kit came in a timely manner and it was an easy install. Great company to work with!

James Martin

Highly Recommend

I would like to take the time to express the outstanding service that I was provided with by Portlandia Electric Supply. They provided me with all the answers to my questions, and after reviewing our quote over the phone I felt comfortable proceeding to order my kit. It’s exactly what I needed and they were there to help us over the phone when we had questions installing it. I highly recommend others in need to choose Portlandia Electric Supply.

Brian H

Solar Kit for Mobile Work Van

As a professional videographer, I needed reliable power on the go.Portlandia Electric Supply Delta Pro and roof-mounted panels were the perfect solution. Setup was easy, and the kit included everything needed. The Delta Pro powers my cameras, lights, laptop, and a small fridge with impressive battery capacity.

Keith S

Best Tech Support

You folks have been wonderful guiding me through the ins and outs of going solar. Plus your tech guys Rod and Nelson are the absolute best. They explained all the different aspects of inverters, batteries and how to keep them in top condition. Too much more to put here… but no other company has the 100% tech support you provide for your customers!

Coll A

Great Experience

My experience with Portlandia Electric Supply has been excellent. Before the sales, they answered all my questions to assure that I got what I needed. After the sales they continued to support me with answers and help. I had a warranty issue with a unit, and it was handled as well as possible. I would recommend them to anyone looking to go solar.

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Manufacturer Warranty, Exceptional Service

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Be Smart, Buy From an Authorized Dealer

When you choose Portlandia Electric Supply, you’re buying real products from a trusted company with established supplier relationships. Enjoy peace of mind with 100% manufacturer warranty coverage and lifetime customer support. In an age where online shopping is fraught with risks, it’s crucial to avoid fly-by-night websites that skirt regulations. Shop with confidence, knowing you’re getting genuine quality and reliable service.

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