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Model SEM 340 Diamond | Mono-crystalline Silicon | 60 Full-Cell Standard | Monofacial | 1000 V System Voltage
The Sunceco SEM 340 Diamond 340W monocrystalline solar panel is engineered for high efficiency and long term reliability in residential, commercial, and light industrial projects. With module efficiency up to 19.63 percent and a power range from 315 to 345 watts, this Diamond Series module delivers strong energy yields from a compact footprint. It uses mono-crystalline silicon cells, advanced surface texturing, and high transmittance tempered glass to capture more sunlight and convert it into usable electricity. A robust anodized aluminum frame, IP67 junction box, and MC4 compatible connectors support fast installation and dependable performance in demanding outdoor environments. Backed by a 15 year product warranty and long lasting power output guarantees, this panel is designed to provide stable energy production over decades while helping reduce electricity bills and carbon footprint.
High power density for limited roof space: Up to 340 watts at 19.63 percent efficiency allows more energy production from smaller arrays, which is ideal where roof or ground space is restricted and system output must be maximized.
Reliable performance across 315–345 W range: The Diamond Series covers several power classes from 315 to 345 watts, which makes system design flexible and allows arrays to be tailored around project budgets and target yields.
Strong output in low irradiance conditions: Optimized cell design and surface texturing support outstanding power delivery during cloudy weather, mornings, and evenings, which increases the total kilowatt hour production across the year.
Built for harsh environmental exposure: Reinforced 3.2 millimeter tempered glass, an anodized aluminum frame, and an anti aging backsheet combine to resist sand abrasion, dust, salt mist, and ammonia corrosion in challenging climates.
Bankable, low degradation investment: Positive power tolerance, a typical total degradation rate of just 0.8 percent per year, and long term power warranties help secure predictable energy yields and improve project bankability.
This Sunceco mono-crystalline module converts sunlight into direct current electricity using premium silicon solar cells wired together in a sealed glass laminate. When sunlight hits the cell surface, photons transfer energy to electrons within the silicon structure and create an electric current. That current is collected by conductors on the cell surface and routed through factory assembled cables and MC4 compatible connectors. In a complete solar power system, this direct current feeds a compatible inverter, which converts it into alternating current for on site consumption or export to the grid. Stable output under standard test conditions and strong performance at nominal module operating temperature help maintain energy yields throughout the day. Very low thermal coefficients help the module retain power as cell temperatures rise in hot climates, which supports dependable operation in real world rooftop and ground mount installations.
Mono-crystalline cell conversion: Each high grade mono-crystalline silicon cell absorbs incident sunlight and generates a flow of electrons. These cells are interconnected in series to build up voltage and in parallel strings to deliver the required current at the module terminals.
Optical enhancement and tempered glass: Advanced surface texturing on the cells and high transmittance 3.2 millimeter reinforced glass reduce reflection losses and trap more light inside the module. This design helps maintain strong power output even under lower irradiance levels such as overcast conditions or partial shading.
System integration and protection: The robust IP67 junction box protects electrical connections against dust and water ingress during long term outdoor exposure. Factory fitted 4.0 square millimeter solar cables and MC4 type connectors simplify string wiring to inverters while maintaining secure, low resistance connections across the array.
| Brand / Manufacturer | Sunceco Inc., United States |
| Model Name | SEM 340 Diamond, Diamond Series |
| Cell Technology / Type | Mono-crystalline silicon solar cells |
| Power Range | 315 Wp to 345 Wp Diamond Series modules |
| Maximum Power (Pmax, STC) | 340 Wp at 1000 W/m², 25 °C, AM 1.5 |
| Module Efficiency (STC) | 19.63% module efficiency for SEM 340 Diamond |
| Power Tolerance | 0 / +5 W positive power tolerance |
| Voltage at Maximum Power (Vmpp, STC) | 37.05 V |
| Current at Maximum Power (Impp, STC) | 9.18 A |
| Open Circuit Voltage (Voc, STC) | 44.23 V |
| Short Circuit Current (Isc, STC) | 9.63 A |
| Maximum Power at NMOT | 252 Wp at nominal operating cell temperature |
| Vmpp at NMOT | 32.99 V |
| Impp at NMOT | 7.66 A |
| Voc at NMOT | 40.27 V |
| Isc at NMOT | 7.99 A |
| Nominal Operating Cell Temperature | 42 ± 3 °C |
| Operating Temperature Range | -40 °C to 85 °C operating range |
| Temperature Coefficient of Pmax | -0.308 % per °C |
| Temperature Coefficient of Voc | -0.243 % per °C |
| Temperature Coefficient of Isc | +0.047 % per °C |
| Maximum System Voltage | 1000 V DC |
| Module Dimensions (H × W × D) | 1762 × 983 × 35 mm overall size |
| Weight per Module | 19.5 kg module weight |
| Front Glass | 3.2 mm high transmittance reinforced tempered glass |
| Backsheet Material | Anti aging protective backsheet film |
| Frame Type | Anodized aluminum alloy frame construction |
| Junction Box Protection Class | IP67 rated junction box enclosure |
| Output Cable Specification | 4.0 mm² PV special cable, pre assembled |
| Connector Type | MC4 compatible connectors |
Certifications: CE compliant; IEC 61215-1 (ed.1); IEC 61215-1-1 (ed.1); IEC 61215-2 (ed.1); IEC 61730-1 (ed.2); IEC 61730-2 (ed.2); Application Class A; Safety Class II; UL 1703 tested construction.
Inverter Compatibility: Designed for modern grid tied and off grid string and hybrid inverters that accept 1000 V DC class mono-crystalline PV modules with MC4 compatible connectors and standard current levels.
Environmental: Resistant to sand and dust abrasion, salt mist, and ammonia environments, with mechanical load ratings up to 3800 Pa wind and 5400 Pa snow, including impact resistance to 35 mm hail at 97 km/h.
Warranty: 15 year manufacturing product warranty, 12 years power warranty to 90 percent of rated output, and 25 years power warranty to 80 percent of rated output, supported by low annual degradation around 0.8 percent.
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