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Model SEM 325 Diamond | Mono-crystalline silicon | 60 Full-Cell | Monofacial | 1000V System Voltage
The Sunceco SEM 325 Diamond monocrystalline solar panel delivers reliable 325 W output with high conversion efficiency. This Diamond Series module has been engineered for residential, commercial, and light industrial rooftops that demand stable performance over decades. Module efficiency reaches 18.76% at Standard Test Conditions, helping more power fit into constrained roof spaces. The SEM 325 sits within a power range from 315 W to 345 W across the Diamond lineup, allowing flexible system design on one unified platform. A rugged anodized aluminium frame, tempered high-transmittance glass, and anti-aging backsheet support long-term durability in harsh outdoor environments. The panel operates safely up to 1000 V system voltage, making it compatible with modern string inverters and commercial arrays. A 15-year product warranty is combined with a long-term power warranty that limits annual degradation. With strong performance at low irradiance and robust mechanical loading, this panel is well suited to demanding sites with variable weather and seasonal conditions.
High efficiency mono-crystalline cells: Advanced monocrystalline silicon cells reach 18.76% efficiency at STC, maximizing energy per square meter.
Strong performance across Diamond power range: The Diamond Series covers 315 W to 345 W, enabling flexible array design while maintaining matching aesthetics and electrical behavior.
Robust environmental protection: The panel uses 3.2 mm reinforced tempered glass, an anti-aging backsheet, and IP67 junction box for reliable outdoor use in varied climates.
Optimized for long-term yield: Power warranty guarantees 90% output at 12 years and 80% at 25 years, supported by a low 0.8% degradation rate per year.
Bankable quality and safety: Triple 100% EL testing, PID-free design, and mechanical load ratings up to 3800 Pa wind and 5400 Pa snow increase reliability and project bankability.
The Sunceco SEM 325 Diamond solar panel converts sunlight into usable DC electricity using high-performance monocrystalline cells. Each cell absorbs incoming solar radiation and generates an electric current through the photovoltaic effect. Cells are wired together inside the module to produce a 325 W output under Standard Test Conditions. The front side uses high-transmittance tempered glass to allow maximum light into the cell matrix while protecting against impact and weather. An encapsulant layer and anti-aging backsheet seal the cells from moisture and contamination during long-term operation. The integrated junction box and MC4-compatible connectors safely route generated current to string cables and then to the inverter. The inverter later converts this DC power into AC electricity suitable for home or commercial loads. Carefully engineered temperature coefficients maintain stable output over a wide operating range, ensuring dependable yield in both hot and cold climates.
Monocrystalline cell conversion: Mono-crystalline silicon cells absorb photons and free electrons, generating direct current within each cell. Cells are series-connected to build useful voltage levels while current is defined by the cell string, delivering 8.91 A at maximum power under STC.
Optimized operating point (Vmpp and Impp): The module operates most efficiently at 36.49 V and 8.91 A at maximum power under STC. Under Nominal Module Operating Temperature, the optimum point shifts to 32.89 V and 7.35 A, and inverters track this point to maximize harvested energy.
Thermal and environmental management: The module is rated for a cell temperature around 42 ± 3 °C under NMOT, balancing performance and component stress. Temperature coefficients for power, voltage, and current manage output changes as conditions vary between -40 °C and 85 °C during operation.
| Brand | Sunceco Inc. |
| Country of Origin | United States |
| Series | Diamond Series SEM 315–345 W |
| Model Number | SEM 325 Diamond |
| Cell Technology | Mono-crystalline silicon |
| Cell Type and Count | 60 full-size mono cells (typical configuration) |
| Power Range (Series) | 315 W to 345 W |
| Maximum Power (Pmax, STC) | 325 Wp |
| Module Efficiency (STC) | 18.76% |
| Power Tolerance | 0 / +5 W (positive power tolerance) |
| Voltage at Maximum Power (Vmpp, STC) | 36.49 V |
| Current at Maximum Power (Impp, STC) | 8.91 A |
| Open-Circuit Voltage (Voc, STC) | 43.55 V |
| Short-Circuit Current (Isc, STC) | 9.36 A |
| Maximum Power (Pmax, NMOT) | 241 Wp |
| Voltage at Maximum Power (Vmpp, NMOT) | 32.89 V |
| Current at Maximum Power (Impp, NMOT) | 7.35 A |
| Open-Circuit Voltage (Voc, NMOT) | 40.15 V |
| Short-Circuit Current (Isc, NMOT) | 7.76 A |
| Nominal Operating Cell Temperature (NOCT) | 42 ± 3 °C |
| Operating Temperature Range | -40 °C to 85 °C |
| Temperature Coefficient of Pmax | -0.308 % / °C |
| Temperature Coefficient of Voc | -0.243 % / °C |
| Temperature Coefficient of Isc | 0.047 % / °C |
| Maximum System Voltage | 1000 V |
| Mechanical Load Rating | 3800 Pa wind load, 5400 Pa snow load, 35 mm hail at 97 km/h |
| Module Dimensions (H × W × D) | 1762 × 983 × 35 mm |
| Weight | 19.5 kg |
| Front Glass | 3.2 mm high-transmittance reinforced tempered glass |
| Backsheet | Anti-aging protective film |
| Frame Type | Anodized aluminium alloy |
| Junction Box Protection Class | IP67, triple 100% EL tested |
| Connector Type | MC4 compatible |
| Cable Cross-Section | 4.0 mm² PV cable |
Certifications: CE compliant; IEC 61215-1, IEC 61215-1-1, IEC 61215-2; IEC 61730-1, IEC 61730-2; Application Class A; Safety Class II; UL 1703.
Inverter Compatibility: Suitable for modern string and central inverters supporting 1000 V DC systems and MC4-compatible connectors.
Environmental: Designed as PID-free, with resistance to sand and dust abrasion, and tested for salt mist and ammonia corrosion environments.
Warranty: 15-year manufacturing product warranty; performance warranty guaranteeing 90% power at 12 years and 80% power at 25 years, with an approximate 0.8% annual degradation rate.
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