G Solar GSM 310-385W BF framed
G Solar GSM 310-385W BF framed
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G Solar GSM 310-385W BF framed

G Solar GSM 310-385W BF framed

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In Stock

Get yours today!

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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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Power Rating 385W

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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 310–385W Monocrystalline Bifacial Framed Solar Panel

Model GSM 310-385W BF framed | Mono-crystalline Bifacial | 60 Full-Cell | Bifacial | 1500V System Voltage

310–385 Wp
Max Power Output
Up to 18.8%
Module Efficiency
60 Cells
Mono-Crystalline

Product Overview

The G-Solar GSM 310-385W BF framed monocrystalline bifacial solar panel delivers high performance, long life and reliable energy production for residential and commercial installations. This premium bifacial module captures light from both sides, enabling a power generation gain of approximately 10–30% from reflected light, depending on installation conditions and surface albedo. The panel uses 60 mono-crystalline cells with advanced surface texturing to maximize light absorption and boost efficiency up to 18.8% on the front side. With zero light induced degradation and strong resistance to potential induced degradation, the module maintains stable energy yield over decades. A robust tempered glass on both sides, an anodized aluminium frame and IP68 rated junction boxes ensure dependable operation even in harsh environments. The GSM 310-385W BF framed module is ideal for sandy, snowy or high latitude regions where bifacial gain and mechanical strength are essential.

Key Benefits

Higher energy yield with bifacial design: The module increases power generation by approximately 10–30% using reflected light on the rear side. This gain helps systems reach target production with fewer modules and optimizes roof or ground space.

Proven long term reliability: Zero light induced degradation preserves initial performance after installation. PID free design, triple 100% EL testing and bankable quality ensure consistent output across the 30 year performance period.

Durable construction for harsh climates: Dual 2.0 mm tempered glass and an anodized aluminium frame provide excellent resistance against sand, dust and mechanical abrasion. The module withstands 3800 Pa wind loads, 5400 Pa snow loads and 35 mm hail at 97 km/h.

Stable performance in heat and low light: A low temperature coefficient of Pmax at -0.38% per °C limits losses on hot days. Outstanding power output at low irradiance supports stronger generation during mornings, evenings and overcast conditions.

Extended product and power warranties: A 15 year manufacturing warranty covers defects in materials and workmanship. The linear power warranty guarantees at least 90% output at 12 years and 80% output at 30 years, giving long term investment confidence.

How It Works

This mono-crystalline bifacial solar module converts sunlight into clean DC electricity using high efficiency silicon cells. The front side captures direct and diffuse sunlight, while the rear side harvests reflected light from the roof, ground or surrounding structures. At standard test conditions, the GSM 310-385W BF framed panel reaches a maximum power of 310 Wp on the front side, with the rear contributing additional energy depending on site conditions. Electrical current passes through five bus bar cell interconnections and then through MC4 compatible connectors into your string design. The system operates safely within a 1500 V DC rating under IEC, using a maximum series fuse of 15 A. Temperature coefficients and NOCT performance values describe how real world conditions influence voltage, current and power, allowing accurate system design and yield estimation.

Front side power generation: The 60 mono-crystalline cells on the front surface absorb incoming sunlight and convert it into electrical energy through the photovoltaic effect. At STC, the GSM 310 configuration provides a maximum power of 310 Wp with a Vmpp of 32.7 V and an Impp of 9.49 A.

Rear side bifacial gain: The transparent glass back allows light to reach the rear side of the cells, capturing reflected and diffuse radiation. Under suitable mounting and surface conditions, this rear side can contribute an additional 10–30% energy, boosting annual yield without increasing array footprint.

Thermal and low light behavior: The nominal operating cell temperature of 42 ±2 °C represents real world temperature under moderate conditions. As temperature rises, the power output decreases slowly due to the -0.38% per °C Pmax coefficient, which is favorable for hot climates. In low irradiance, advanced surface texturing and cell design help maintain useful voltage and current, enhancing energy harvest during less than ideal weather.

Technical Specifications

Brand G-Solar
Model GSM 310-385W BF framed
Cell Technology Mono-crystalline, 5 bus bars
Cell Count and Layout 60 cells (6×10)
Technology Type Bifacial, framed module
Power Range (STC, front side) 300–310 Wp per module
Maximum Power (Pmax, STC, front side) 310 Wp
Power at NOCT (front side) 228 Wp
Module Efficiency (front side) 18.2–18.8 % depending on power class
Module Efficiency (rear side, typical) 15.5–16.1 % depending on power class
Voltage at Maximum Power Vmpp (STC, front) 32.7 V
Current at Maximum Power Impp (STC, front) 9.49 A
Open Circuit Voltage Voc (STC, front) 39.6 V
Short Circuit Current Isc (STC, front) 9.98 A
Voltage at Maximum Power Vmpp (NOCT, front) 30.0 V
Current at Maximum Power Impp (NOCT, front) 7.59 A
Open Circuit Voltage Voc (NOCT, front) 36.6 V
Short Circuit Current Isc (NOCT, front) 8.04 A
Power Tolerance 0 ~ +1.5% (module), datasheet 0 / +5 W
Maximum System Voltage 1500 V DC (IEC), 1000 V DC (UL)
Maximum Series Fuse Rating 15 A
Nominal Operating Cell Temperature (NOCT) 42 ±2 °C
Operating Temperature Range -40 °C to 85 °C
Temperature Coefficient of Pmax -0.38 % / °C
Temperature Coefficient of Voc -0.30 % / °C
Temperature Coefficient of Isc +0.048 % / °C
Module Dimensions (H × W × D) 1974 × 992 × 35 mm
Weight 21.7 kg
Front Glass / Back Glass 2.0 mm tempered glass on both sides
Frame Material Anodized aluminium alloy, framed design
Junction Box Protection IP68, distributed junction box
Connector Type MC4 compatible
Output Cables 4.0 mm², asymmetric lengths (-) 350 mm, (+) 160 mm
Mechanical Load Rating 3800 Pa wind, 5400 Pa snow, 35 mm hail at 97 km/h
Country of Origin / Seller G-Solar, Germany

Certifications & Compliance

Certifications: CE compliant, IEC 61215 application, TÜV Safety Class II, UL 1703, tested for PID resistance, sand and dust abrasion, salt mist and ammonia corrosion.
Inverter Compatibility: Designed for 1500 V DC systems and 1000 V DC UL systems, compatible with modern string and centralized inverters that support these DC input ratings.
Environmental: Enhanced fire resistance with excellent safety behavior, robust performance under wind and snow loads, and resistance to harsh coastal or agricultural atmospheres.
Warranty: 15 year manufacturing warranty covering materials and workmanship, 12 year warranty at 90% power output and 30 year warranty at 80% power output with a total degradation rate of approximately 0.67% per year.

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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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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