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Zhongtai New Energy ZT320 320W Polycrystalline Standard Solar Panel
Model ZT320 | Polycrystalline Silicon | 72 Full-Cell | Monofacial | 1000V System Voltage
Product Overview
The Zhongtai New Energy ZT320 320W polycrystalline solar panel is designed as a dependable choice for residential, commercial, and off-grid systems. This robust module delivers a maximum power output of 320 Wp with a panel efficiency of 16.49 percent under standard test conditions. Its polycrystalline cell technology offers stable performance and a strong balance between cost and long term energy yield. The module operates within a power range from 300 to 330 Wp, supporting flexible array design. A 10 year product warranty and 25 year power warranty provide long lasting assurance. The ZT320 panel maintains at least 80 percent of its rated power after 25 years, supported by a low annual degradation rate of 0.8 percent. With a rated maximum system voltage of 1000 volts, it integrates easily with most modern inverters and balance of system components. This panel is produced by Baoding Zhongtai New Energy Technology Co., Ltd in China, ensuring reliable manufacturing control and consistent quality.
Key Benefits
Reliable 320W power class: Each ZT320 panel delivers up to 320 Wp of output under standard test conditions. The 300 to 330 Wp power range allows flexible system sizing for rooftops and ground mounts.
Optimized module efficiency: Module efficiency of 16.49 percent helps maximize energy generation from available roof or land area. This efficiency level supports strong energy yields over the panel lifetime.
Long term performance warranty: The 25 year power warranty guarantees at least 80 percent of initial power output. A low annual degradation rate of 0.8 percent protects long term energy production.
Durable construction and materials: The panel uses 3.2 mm tempered glass and an anodized aluminium frame for mechanical strength. These materials improve resistance to wind, snow, and transport handling stress.
Robust thermal and environmental range: An operating temperature range from minus 45 to 85 degrees Celsius supports diverse climates. Temperature coefficients are clearly defined to aid accurate system design and yield estimates.
Proven polycrystalline cell technology: Polycrystalline cells offer mature, field tested technology with predictable performance. The 72 cell layout helps deliver higher string voltages for efficient system configurations.
How It Works
The Zhongtai New Energy ZT320 320W polycrystalline solar panel converts sunlight into usable direct current electricity through its 72 interconnected cells. Each cell is made from polycrystalline silicon, which absorbs incoming light and generates an electric charge. When the panel is wired into a solar array, the modules are connected in series and parallel to reach the desired system voltage and current. The panel delivers a maximum power output of 320 Wp at a voltage of 37.4 volts and a current of 8.56 amperes. Open circuit voltage reaches 46.4 volts, while short circuit current is rated at 9.05 amperes. These electrical characteristics are considered by installers when designing string layouts and selecting inverters. The EVA encapsulant, tempered glass, and aluminium frame protect the cells from moisture and mechanical damage. Over its service life, the panel experiences gradual power reduction, limited by the specified 0.8 percent annual degradation rate to at least 80 percent of initial power after 25 years.
Light absorption and current generation: Sunlight strikes the polycrystalline silicon cells on the front of the module. Photons transfer energy to electrons in the cell material, creating an electric current between the cell contacts. The cells are wired together to deliver the rated current of 8.56 amperes at maximum power. This direct current then flows through the panel junction box into the system wiring.
Voltage, power point, and inverter pairing: The 72 cell configuration produces a maximum power voltage of 37.4 volts for each module. Open circuit voltage reaches 46.4 volts, setting design limits for string sizing. Installers configure several panels in series so the array voltage fits within inverter input windows. The inverter then tracks the maximum power point, converting the panel direct current into grid ready alternating current.
Thermal behavior and long term stability: Panel performance varies with temperature, defined by the temperature coefficients of power, voltage, and current. The ZT320 carries a Pmax coefficient of minus 0.45 percent per degree Celsius, indicating modest power loss on hot days. A Voc coefficient of minus 0.37 percent per degree Celsius and an Isc coefficient of 0.06 percent per degree Celsius guide engineering calculations. Within its operating temperature range of minus 45 to 85 degrees Celsius, the module maintains safe operation and predictable output.
Technical Specifications
| Module Type | Polycrystalline solar panel |
| Model Number | ZT320 |
| Manufacturer | Baoding Zhongtai New Energy Technology Co., Ltd. |
| Country of Origin | China |
| Maximum Power (Pmax) | 320 Wp |
| Power Range | 300 ~ 330 Wp |
| Module Efficiency | 16.49 % (range 15.46 ~ 17 %) |
| Power Tolerance | 0 ~ +1.5 % |
| Voltage at Maximum Power (Vmpp) | 37.4 V |
| Current at Maximum Power (Impp) | 8.56 A |
| Open Circuit Voltage (Voc) | 46.4 V |
| Short Circuit Current (Isc) | 9.05 A |
| Maximum System Voltage | 1000 V |
| Series Fuse Rating | 15 A |
| Nominal Operating Cell Temperature | 46 ± 2 °C |
| Operating Temperature Range | -45 ~ 85 °C |
| Temperature Coefficient of Pmax | -0.45 % / °C |
| Temperature Coefficient of Voc | -0.37 % / °C |
| Temperature Coefficient of Isc | 0.06 % / °C |
| Panel Dimensions (H × W × D) | 1960 × 990 × 40 mm |
| Weight | 25.5 kg |
| Cell Count and Type | 72 polycrystalline silicon cells |
| Front Glass | Tempered glass, 3.2 mm thickness |
| Encapsulant Material | EVA (ethylene vinyl acetate) |
| Frame Type | Anodized aluminium frame |
Certifications & Compliance
Certifications: Certification details are determined by the manufacturer and may vary by region.
Inverter Compatibility: Suitable for most modern string and hybrid inverters rated up to 1000V DC input.
Environmental: Designed for outdoor rooftop and ground mount use within the specified temperature range.
Warranty: 10 year product warranty and 25 year performance warranty to 80 % of initial power, with 0.8 % annual degradation rate.
Documentation
Product Datasheet (PDF)● Available | Contact us for lead time and pricing
| SKU | PES-SPS-SOL-23322 |
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| Manufacturer | PES Supply |
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