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Model ZT305 | Polycrystalline | 72 Full-Cell Polycrystalline | Monofacial | 1000V System Voltage
The Zhongtai New Energy ZT305 305W polycrystalline solar panel delivers reliable power for homes and small commercial systems. This versatile module uses proven polycrystalline cell technology to provide stable output even in demanding environments. With a rated maximum power of 305 Wp, it fits perfectly into residential rooftops, off‑grid cabins, and small industrial installations. Panel efficiency of 15.71% supports solid energy production while maintaining a manageable panel size. The module is configured with 72 cells and a maximum system voltage of 1000 V, allowing flexible array design. It is manufactured by Baoding Zhongtai New Energy Technology Co., Ltd. in China, a specialist in photovoltaic solutions. A robust anodized aluminium frame, tempered glass front, and EVA encapsulant protect the cells from weather and mechanical stress. The ZT305 sits within a wider power range from 300 Wp to 330 Wp, making system planning straightforward. Installers can integrate this panel into new builds or retrofits with confidence in long term performance. The product warranty of 10 years and 25 year power warranty demonstrate a strong commitment to durability and energy yield.
Reliable 305 Wp output: Each module delivers a nominal maximum power of 305 Wp under standard conditions. This rating supports predictable array sizing and energy forecasts for a wide range of projects.
Balanced efficiency and footprint: Panel efficiency of 15.71% offers a strong balance between energy yield and module size. The 1960 x 990 mm footprint suits many roof layouts and ground mount structures.
Long term performance assurance: A 10 year product warranty covers manufacturing quality and materials. A 25 year power warranty guarantees at least 80% of initial output after the warranty period, with a low annual degradation rate.
Robust construction for harsh climates: Tempered 3.2 mm glass, EVA encapsulation, and an anodized aluminium frame provide excellent mechanical strength. The operating temperature range from -45°C to 85°C supports use in diverse climates.
Flexible system design options: A maximum system voltage of 1000 V supports long string configurations to reduce BOS costs. The wide power range from 300 to 330 Wp makes matching different array capacities straightforward.
Consistent current and voltage characteristics: With Vmpp of 36.8 V and Impp of 8.3 A, the module integrates smoothly with common string inverters. The tight positive power tolerance from 0 to +1.5% enhances real world generation.
This Zhongtai New Energy ZT305 polycrystalline module converts sunlight into usable electrical energy through photovoltaic cells. Its 72 polycrystalline silicon cells are connected in series and encapsulated under tempered glass. When sunlight hits the cell surface, photons transfer energy to electrons inside the silicon structure. These energized electrons move under the internal electric field and create direct current electricity. The current is collected by metallic busbars and directed through the panel junction box. From there, DC power flows along strings of modules to an inverter, which converts it into AC electricity. That AC power is then used to supply building loads or exported to the grid. The panel’s electrical parameters, such as Voc of 45.6 V and Isc of 8.91 A, define how it behaves in different system configurations. Temperature coefficients describe how output changes with cell temperature increases. This information helps designers predict yield and select optimal string lengths for efficient operation.
Photovoltaic energy conversion: The 72 polycrystalline cells absorb sunlight and release charge carriers within the silicon lattice. An internal electric field drives these charge carriers, creating a direct current at the panel terminals. The rated maximum power of 305 Wp is achieved when the module operates at its Vmpp and Impp. Under standard test conditions, this balance point occurs at 36.8 V and 8.3 A respectively.
String configuration and system voltage: The panel is designed for arrays operating up to 1000 V system voltage. Multiple modules can be wired in series to reach inverter input requirements while staying within safety limits. Open circuit voltage of 45.6 V per panel helps determine the maximum number of modules in a string. Short circuit current of 8.91 A informs cable sizing and protection device selection in the DC circuit.
Thermal behavior and real world yield: Panel output is influenced by operating temperature across different seasons. The power temperature coefficient of -0.45% per °C describes how Pmax drops as temperature rises. Voc decreases by about -0.37% per °C while Isc increases slightly by 0.06% per °C. Designers use this data to estimate performance on hot roofs, cold mornings, and varying irradiance conditions.
| Brand | Baoding Zhongtai New Energy Technology Co., Ltd. |
| Country of Origin | China |
| Model Number | ZT305 |
| Module Type | Polycrystalline, monofacial |
| Power Range | 300 Wp to 330 Wp |
| Maximum Power (Pmax) | 305 Wp |
| Module Efficiency | 15.71% |
| Panel Efficiency Range | 15.46% to 17.0% |
| Power Tolerance | 0 to +1.5% |
| Total Degradation at 25 Years | 20% maximum (80% of initial power guaranteed) |
| Indicative Annual Degradation Rate | Approximately 0.8% per year over 25 years |
| Voltage at Maximum Power (Vmpp) | 36.8 V |
| Current at Maximum Power (Impp) | 8.3 A |
| Open Circuit Voltage (Voc) | 45.6 V |
| Short Circuit Current (Isc) | 8.91 A |
| Maximum System Voltage | 1000 V |
| Series Fuse Rating | 15 A |
| Nominal Operating Cell Temperature | 46 ± 2°C |
| Operating Temperature Range | -45°C to 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 x W x D) | 1960 x 990 x 40 mm |
| Weight | 25.5 kg |
| Cell Count and Type | 72 polycrystalline cells |
| Front Glass | 3.2 mm tempered glass |
| Encapsulant | EVA (ethylene vinyl acetate) |
| Frame Material | Anodized aluminium frame |
Certifications: Factory certification details are typically provided on the official datasheet and nameplate. Please refer to the manufacturer documentation or contact your distributor for the exact IEC and safety standards for this model.
Inverter Compatibility: Compatible with most grid‑tie and off‑grid string inverters that accept 1000 V DC systems. Final compatibility should always be confirmed against inverter voltage and current limits and local electrical codes.
Environmental: Designed for outdoor photovoltaic use with wide thermal operating range from -45°C to 85°C. Resistance to weather exposure is supported by tempered glass, EVA encapsulation, and anodized aluminium framing.
Warranty: 10 year limited product warranty covering materials and workmanship. 25 year limited power warranty with at least 80% of original power output guaranteed at the end of the warranty period, based on an indicative 0.8% annual degradation rate.
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