G Solar GSM 305-380W BF framed
G Solar GSM 305-380W BF framed
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SKU  PES-SPS-SOL-5953

G Solar GSM 305-380W BF framed

G Solar GSM 305-380W BF framed

OEM Authorized Dealer BABA Compliant Full OEM Warranty 7-10 Business Day Delivery

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In Stock

Get yours today!

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9+ sold

In the last 7 days

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Flat Rate Shipping - Calculated at Checkout

Delivery timeframe shown above at checkout

Lifetime Customer Support

Unlimited lifetime support, always available.

In High Demand! Order Now To Secure Your Items

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Specifications

Power Rating 380W

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What is your return policy?

Returns are free in the first 30 days with no restocking or processing fees, although the customer may be responsible for paying return shipping. See our complete return policy on our Shipping, Delivery, and Returns page linked in the footer of this website.

What’s covered by your return policy?

Our returns policy covers all purchases made through Portlandia Electric Supply. For warranty issues, as authorized distributors, we honor the full manufacturer warranty of ALL the brands on our website. See our complete returns and warranty policies on our Shipping, Deliver, and Returns page.

How long will it take to receive my order?

All orders are processed within 72 hours and you can expect delivery on most orders within 5-7 business days. You will receive access to our customer portal after ordering, where it is easy to track all your shipments. See our Shipping, Delivery and Returns page for more details.

What are your financing and payment options?

We offer several ways to pay to make getting your solar kit simple:

Credit Card: if the purchase is greater than your card’s limit, you can split the cost onto multiple cards as well as Paypal, financing through Affirm, and ACH/bank transfer

You can arrange financing during the checkout process, or scroll further down this page for more details. Please note, if you'd like to finance your order, you can do so instantly, right at checkout.

How does your Lifetime Customer Support work?

Our legendary lifetime customer support has helped make us the #1 online solar retailer! We have a dedicated team of solar professionals standing by to help you navigate the world of solar with ease. From selecting the perfect solar kit to installation and beyond, we provide support and expertise at every step of the journey.If you need help with ordering, shipping, troubleshooting, expanding your system, warranty issues, or anything else you have questions about for as long as you own your Portlandia Electric Supply equipment, we’ve got you covered: we’re always only a phone call or email away.

G-Solar GSM 305–380W Bifacial Framed Monocrystalline Solar Panel

Model GSM 305-380W BF Framed | Mono-crystalline Bifacial | 60 Full-Cell Mono | Bifacial | 1500V System Voltage

380 W
Max Power Output
18.8%
Module Efficiency
60
N-Type TOPCon

Product Overview

The G-Solar GSM 305–380W bifacial framed monocrystalline solar panel is designed for high-yield rooftop and ground-mounted systems. This premium bifacial module captures energy from both the front and rear sides, using reflected light to boost total generation by approximately 10–30% under suitable conditions. German engineering and mono-crystalline cell technology deliver stable performance and reliable output for residential, commercial, and light industrial projects. The module achieves up to 18.8% front-side efficiency, with strong production even at low irradiance levels. Durable tempered glass, an anodized aluminium frame, and IP68 junction boxes ensure long-term operation in demanding climates. With extended power warranties and robust mechanical strength, this panel is built to provide dependable clean energy for decades.

Key Benefits

Higher energy yield from bifacial design: Rear-side generation increases output by around 10–30% when sufficient reflected light is available.

Reliable long-term performance: Zero light induced degradation and a low annual degradation rate support stable production over the lifetime.

Strong mechanical resilience: The module withstands high wind and snow loads and resists sand, dust, salt mist, and ammonia exposure.

High efficiency mono-crystalline cells: Advanced cell texturing improves light capture, supporting up to 18.8% module efficiency on the front side.

Bankable, safety-focused solution: CE, IEC, TÜV, and UL compliance, combined with excellent fire resistance, enhance project bankability and safety.

How It Works

This bifacial mono-crystalline solar panel converts sunlight into electricity using high-efficiency silicon cells laminated between tempered glass layers. The front side captures direct solar radiation, while the transparent back side uses reflected and diffused light from surfaces such as roofs, ground coverings, or snow. Electricity produced by the 60 series-connected cells is delivered through MC4 compatible connectors and integrated output cables. When connected to a suitable inverter, the generated DC power is converted into AC power for building loads or grid export. Temperature-optimized cell characteristics and low-loss materials help maintain reliable output in real-world conditions across a wide temperature range.

Bifacial energy capture: The front of the module absorbs direct sunlight, delivering the rated front-side power under standard test conditions. The rear side simultaneously uses light reflected from the installation surface, increasing total system yield without additional roof area.

Mono-crystalline cell conversion: Each mono-crystalline cell generates a direct current when photons free electrons inside the silicon structure. Cells are wired in series to create useful system voltage, while careful busbar and layout design reduce resistive losses.

System integration and protection: The IP68 junction box safeguards electrical connections against moisture and dust in demanding environments. Standard MC4 compatible connectors allow quick, secure integration with inverters and balance-of-system components.

Technical Specifications

Brand G-Solar
Model Series GSM 300–385W BF Framed (focus on GSM 305–380W BF)
Cell Technology Mono-crystalline, 5 bus bars
Cell Count and Layout 60 cells (6 × 10), framed module
Technology Type Bifacial mono-crystalline module
Power Range (Front Side, STC) 305 Wp to 380 Wp depending on exact configuration
Maximum Power (Front / Rear, STC) – GSM 305–380W BF reference 305 W / 259 W front / rear at STC
Module Efficiency (Front / Rear, STC) 18.5% front / 15.7% rear for GSM 305–380W BF; up to 18.8% front in series
Voltage at Maximum Power Vmpp (STC) 32.5 V front side, 32.4 V rear side for GSM 305–380W BF
Current at Maximum Power Impp (STC) 9.39 A front side, 8.01 A rear side for GSM 305–380W BF
Open-Circuit Voltage Voc (STC) 39.4 V front side, 39.1 V rear side for GSM 305–380W BF
Short-Circuit Current Isc (STC) 9.90 A front side, 8.47 A rear side for GSM 305–380W BF
Maximum Power at NOCT (Front / Rear) 224 W / 191 W at 800 W/m² and 20°C for GSM 305–380W BF
Vmpp at NOCT 29.8 V front side, 29.7 V rear side for GSM 305–380W BF
Impp at NOCT 7.51 A front side, 6.41 A rear side for GSM 305–380W BF
Voc at NOCT 36.4 V front side, 36.2 V rear side for GSM 305–380W BF
Isc at NOCT 7.98 A front side, 6.83 A rear side for GSM 305–380W BF
Power Tolerance 0 / +5 W positive power tolerance for the series
Maximum System Voltage 1500 V DC (IEC), 1000 V DC (UL)
Series Fuse Rating 15 A maximum series fuse
Nominal Operating Cell Temperature (NOCT) 42 ± 2 °C
Operating Temperature Range -40 °C to +85 °C
Temperature Coefficient of Pmax -0.38 % per °C
Temperature Coefficient of Voc -0.30 % per °C
Temperature Coefficient of Isc +0.048 % per °C
Module Dimensions (H × W × D) 1974 × 992 × 35 mm framed module
Weight 21.7 kg per module
Front / Back Glass 2.0 mm tempered glass on both sides
Frame Material Anodized aluminium alloy frame
Junction Box Rating IP68 distributed junction box design
Connector Type MC4 compatible connectors
Output Cables 4.0 mm² cables, (-) 350 mm and (+) 160 mm lengths
Mechanical Load Capacity Up to 5400 Pa snow load and 3800 Pa wind load

Certifications & Compliance

Certifications: CE compliant, IEC 61215 application, TÜV Safety Class II, UL 1703, triple 100% EL tested, excellent fire resistance.
Inverter Compatibility: Compatible with most modern grid-tied and off-grid inverters that accept 1500 V DC strings and MC4 connections.
Environmental: Resistant to sand and dust abrasion, suitable for salt mist and ammonia environments, designed for harsh climates and high latitude sites.
Warranty: 15-year manufacturing warranty, 12 years at 90% power output, and 30 years at 80% power output under standard conditions.

Documentation

Product Datasheet (PDF)

● Available | Contact us for lead time and tailored project pricing

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From hurricanes to blackouts, reliable solar power ensures you're able to keep your home & family safe no matter what comes your way.

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Making one-click solar solutions simple since 2018. Whether you’re powering a cabin, charging devices, or backing up your home.

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Secure Your Independence

Say goodbye to reliance on the energy companies. Enjoy the same freedom that 50,000+ customers have with their own solar power system.

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.

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

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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