Get yours today!
In the last 7 days
Delivery timeframe shown above at checkout
Unlimited lifetime support, always available.
Trade pricing on 169 authorized brands. Full OEM warranties. 7-10 business days delivery.
Shop All ProductsPremium monocrystalline and bifacial panels with 25-year warranties from authorized manufacturers.
Shop Solar PanelsString, micro, and hybrid inverters from 8+ authorized brands. Full warranty and technical support.
Shop InvertersHome and commercial battery systems from leading manufacturers. Grid-tied and off-grid options.
Shop BatteriesRoof and ground mount systems from IronRidge, Unirac, and K2. All components in stock.
Shop RackingMPPT and PWM charge controllers for off-grid and hybrid solar systems from authorized brands.
Shop ControllersHome standby, portable, and commercial generators. Automatic transfer switches and installation accessories.
Shop GeneratorsHome and commercial EV chargers. Smart connectivity and universal compatibility.
Shop EV ChargersBreakers, panels, wire, conduit, and safety switches from Square D, Siemens, Eaton, and more. Not just solar.
Shop Electrical50,000+ SKUs, 169 authorized brands. Our team helps you find the right products for any project.
Get a Quote
Model GSM 305-380W BF Framed | Mono-crystalline Bifacial | 60 Full-Cell Mono | Bifacial | 1500V System Voltage
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.
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.
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.
| 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:
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.
● Available | Contact us for lead time and tailored project pricing
From hurricanes to blackouts, reliable solar power ensures you're able to keep your home & family safe no matter what comes your way.
Making one-click solar solutions simple since 2018. Whether you’re powering a cabin, charging devices, or backing up your home.
Say goodbye to reliance on the energy companies. Enjoy the same freedom that 50,000+ customers have with their own solar power system.
$150 Value - Free Offer (Limited Time Only!) No Strings Attached. Totally Free. Takes Less than 2 Minutes.