Selfa SV120M.3.2-370
Selfa SV120M.3.2-370
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Selfa SV120M.3.2-370

Selfa SV120M.3.2-370

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9+ sold

In the last 7 days

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Lifetime Customer Support

Unlimited lifetime support, always available.

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Length 120 m

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Selfa SV120M.3.2-370 370W Monocrystalline Half-Cut Solar Panel

Model SV120M.3.2-370 | Monocrystalline PERC Half-Cut | 120 Half-Cut Cells | Monofacial | 1000V System Voltage

370 W
Max Power Output
20.3%
Module Efficiency
120
N-Type TOPCon

Product Overview

The Selfa SV120M.3.2-370 370W monocrystalline half-cut solar panel is designed for reliable, high-yield power generation in residential and commercial systems. This premium module from Polish manufacturer Selfa GE S.A. combines advanced PERC cell technology with a half-cut design for higher efficiency and lower electrical losses. With up to 20.3% panel efficiency, a robust mechanical structure, and a long-term linear power warranty, it delivers stable performance across a wide range of European climates. The panel features a durable 3.2 mm tempered glass with anti-reflection coating and an IP68 junction box for long-lasting field operation. It suits grid-tied rooftops, ground mounts, and small commercial installations that demand consistent output and dependable quality.

Key Benefits

High power density for limited roof space: The 370 W nominal power and up to 20.3% efficiency deliver strong output even on compact roofs, allowing more energy from fewer modules and helping projects meet ambitious yield targets.

Half-cut cell design for better performance: Half-cut PERC cells reduce resistive losses and improve shade tolerance on real rooftops. This design supports more stable generation during partial shading and less energy loss along the string over time.

Durable construction for harsh weather: The module withstands wind loads up to 3800 Pa and snow loads up to 5400 Pa, supporting installations in demanding climates with heavy snow or strong gusts. Its tempered, anti-reflective glass further protects the cells from impact and abrasion.

Extended warranties and low degradation: A 12-year product warranty and a 25-year linear power warranty provide long-term investment security. Degradation is controlled, with an expected 91.8% power after 10 years and around 83% after 25 years under standard conditions.

Easy integration with modern systems: A maximum system voltage of 1000 V DC, standard MC4-compatible connectors, and 4 mm² cables make the panel simple to incorporate with common string inverters and mounting systems, streamlining design and installation work.

How It Works

This Selfa monocrystalline half-cut solar panel converts sunlight into usable DC electricity through high-efficiency PERC cells arranged in 120 half-cut segments. When sunlight reaches the anti-reflective tempered glass, more light is transmitted into the silicon cells thanks to the specialized surface treatment. The PERC architecture and half-cut layout reduce resistive pathways and improve current flow inside the module. The generated DC power is guided through three bypass diodes inside the IP68 junction box, limiting losses when partial shading occurs on the module surface. From there, pre-installed 4 mm² cables and MC4-compatible connectors carry the power to your inverter, where it is converted into AC electricity for on-site consumption or export to the grid. The module maintains performance across a broad operating temperature range, supported by low temperature coefficients for both voltage and power.

Monocrystalline PERC half-cut cells: Each module uses high-grade monocrystalline PERC cells, cut into half-size units to lower internal resistance and reduce power losses under operating conditions. This architecture supports higher conversion efficiency compared with many conventional full-cell designs and helps sustain strong output as the system ages.

Optimized electrical design with bypass diodes: Three integrated bypass diodes divide the module into multiple electrical sections, allowing unaffected cell strings to continue producing power during partial shading or soiling. This design minimizes hotspot risk and improves real-world yield on rooftops with chimneys, dormers, or nearby obstacles that cast shadows.

Robust thermal and mechanical performance: The panel operates reliably from -40°C to +85°C, supported by stable temperature coefficients of -0.36%/°C for power and -0.31%/°C for open-circuit voltage. Its tempered glass, reinforced frame, and certified load ratings protect the solar cells against wind, snow, and environmental stress, helping maintain output over the full warranty period.

Technical Specifications

Module Type Selfa SV120M.3.2-370 monocrystalline half-cut solar panel
Power Range 360 Wp / 365 Wp / 370 Wp nominal module options
Nominal Power at STC (Pmax) 370 Wp (tolerance -0 W / +5 W)
Module Efficiency (STC) Up to 20.3% (range 19.7% to 20.3% across series)
Open-Circuit Voltage Voc (STC) 40.9 V for SV120M.3.2-370
Voltage at Maximum Power Vmpp (STC) 34.3 V for SV120M.3.2-370
Short-Circuit Current Isc (STC) 11.49 A for SV120M.3.2-370
Current at Maximum Power Impp (STC) 10.79 A for SV120M.3.2-370
Nominal Power at NOCT (Pmax) 278.2 Wp for SV120M.3.2-370 at NOCT conditions
Open-Circuit Voltage Voc (NOCT) 38.7 V for SV120M.3.2-370 at NOCT
Voltage at Maximum Power Vmpp (NOCT) 32.0 V for SV120M.3.2-370 at NOCT
Short-Circuit Current Isc (NOCT) 9.17 A for SV120M.3.2-370 at NOCT
Current at Maximum Power Impp (NOCT) 8.69 A for SV120M.3.2-370 at NOCT
Power Tolerance 0 to +1.5% positive tolerance, with factory-controlled output
Nominal Operating Cell Temperature (NOCT) 42 ± 2 °C under NOCT test conditions
Temperature Coefficient of Pmax -0.36 % per °C change in module temperature
Temperature Coefficient of Voc -0.31 % per °C change in module temperature
Temperature Coefficient of Isc +0.06 % per °C change in module temperature
Operating Temperature Range -40 °C to +85 °C module operating range
Maximum System Voltage 1000 V DC maximum system voltage rating
Module Dimensions (H × W × D) 1756 mm × 1039 mm × 35 mm overall panel size
Weight 20.3 kg total module weight
Cell Count and Layout 120 monocrystalline PERC half-cut cells per module
Front Glass Type 3.2 mm prismatic tempered glass with integrated anti-reflection structure
Junction Box Protection IP68 rated junction box with three bypass diodes installed
Connector and Cable 4 mm² solar cable, 2 × 1200 mm length, MC4-compatible connectors
Mechanical Load Resistance Wind load up to 3800 Pa and snow load up to 5400 Pa tested
Environmental Resistance Tested for salt mist and ammonia exposure according to IEC standards
Degradation Rate and Power Retention Approximately 0.68% annual degradation, 91.8% at 10 years and 83% at 25 years
Manufacturer and Origin Selfa GE S.A., photovoltaic module producer based in Poland

Certifications & Compliance

Certifications: Designed and tested in line with core IEC photovoltaic module standards, including resistance to wind, snow, salt mist, and ammonia exposure for long-term reliability in European climates.
Inverter Compatibility: Compatible with most modern 1000 V string inverters that support monocrystalline PERC modules using standard MC4-type connectors and similar current ratings per string.
Environmental: Module components are engineered for outdoor use, featuring IP68 junction box protection, robust framing, and tempered glass to maintain safety and performance in varied weather conditions.
Warranty: 12-year product warranty backed by Selfa and a 25-year linear power warranty, guaranteeing 91.8% output at year ten and approximately 83% output at year twenty-five under standard operating conditions.

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

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