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Model GMH440W | Monocrystalline | 120 Half-Cell 182×91 mm | Monofacial | 1500V System Voltage
The Grankia GMH440W 440W monocrystalline solar panel is designed for projects that demand reliable power and strong performance in a compact footprint. With a rated maximum power of 440 Wp and panel efficiency up to 20.3%, this module delivers excellent energy yield per square meter for residential, commercial, and light industrial arrays. The panel sits in the broader GMH series power range from 430 to 455 Wp, giving system designers flexibility when matching strings and inverters. A robust anodized aluminium frame, high quality EVA encapsulant, and 3.2 mm tempered glass support long term durability in challenging climates. The GMH440W uses 120 monocrystalline cells sized 182×91 mm, configured as half cells for improved performance and lower resistive losses. With a 12 year product warranty and 1500 V system voltage rating, this Grankia module can be used confidently in modern high voltage string designs. Temperature coefficients are tightly controlled, helping maintain output in hot conditions and improving predictability of long term energy production.
High power density: The 440 Wp output paired with 20.3% efficiency helps maximize energy generation on limited roof or ground space. This higher power density supports lower balance of system costs and simplifies array design.
Optimized electrical performance: A positive power tolerance of 0 to +1% ensures that each panel delivers at least its rated power under standard test conditions. This improves real world yield and makes system performance more predictable over time.
Reliable in harsh temperatures: With an operating temperature range from -40°C to 85°C, the GMH440W is suitable for cold winters and hot summers. Carefully controlled temperature coefficients help limit output losses in high ambient and cell temperatures.
Durable construction: The panel combines a 3.2 mm glass layer, EVA encapsulation, and an anodized aluminium frame to protect cells from mechanical stress. An IP68 rated junction box with three diodes offers strong moisture resistance and safe long term operation.
Flexible system integration: A 1500 V maximum system voltage and 25 A series fuse rating support use in large strings and varied inverter platforms. The consistent module weight and dimensions make installation straightforward across roof mount and ground mount structures.
The GMH440W solar panel converts sunlight into usable electrical energy using high efficiency monocrystalline cells arranged in a 120 half cell layout. When sunlight reaches the 182×91 mm cells, photons are absorbed and create electron flow within the silicon material. This flow becomes direct current electricity, which is directed through the panel’s internal busbars and out through the junction box and DC cables. The panel operates at a maximum power voltage of 34.28 V and a maximum power current of 12.84 A under standard test conditions. System designers combine multiple modules in series and parallel strings to achieve the desired array voltage and current. The generated DC power is then routed to a compatible inverter, where it is converted to alternating current for on site use or export to the grid. Throughout this process, the panel’s electrical characteristics, temperature behavior, and protection features work together to maintain stable output and protect connected equipment.
Monocrystalline energy conversion: Each monocrystalline cell uses a highly ordered silicon structure that supports efficient charge movement and higher output per cell. The GMH440W module groups 120 of these cells to create a powerful generator while keeping voltage and current within safe limits for modern inverters.
Voltage, current, and power point: At its maximum power point, the panel operates around 34.28 V and 12.84 A, delivering approximately 440 Wp under test conditions. Inverters with maximum power point tracking continuously adjust the operating point along the current voltage curve to capture the highest possible output from the module.
Thermal behavior and protection: As temperatures rise, cell voltage naturally decreases, but the GMH440W’s low temperature coefficients limit performance loss. The IP68 junction box with three diodes helps protect the module against reverse currents and localized shading, while the 25 A series fuse rating safeguards wiring and connected components.
| Brand / Seller | Grankia Electric (Guangdong) Co., Ltd. |
| Country of Origin | China |
| Module Type | Monocrystalline, monofacial |
| Model Number | GMH440W |
| Power Range | 430 Wp to 455 Wp (series range) |
| Maximum Power (Pmax) | 440 Wp |
| Power Tolerance | 0 ~ +1 % |
| Panel Efficiency | 20.3% (series range 19.9 ~ 21.1%) |
| Voltage at Maximum Power (Vmpp) | 34.28 V |
| Current at Maximum Power (Impp) | 12.84 A |
| Open Circuit Voltage (Voc) | 40.95 V |
| Short Circuit Current (Isc) | 13.74 A |
| Nominal Module Temperature | 45 ± 2 °C |
| Operating Temperature Range | -40 °C to 85 °C |
| Temperature Coefficient of Pmax | -0.35 % / °C |
| Temperature Coefficient of Voc | -0.276 % / °C |
| Temperature Coefficient of Isc | 0.046 % / °C |
| Maximum System Voltage | 1500 V |
| Series Fuse Rating | 25 A |
| Panel Dimensions (H × W × D) | 1909 × 1134 × 30 mm |
| Weight | 23.9 kg |
| Cell Size | 182 × 91 mm |
| Number of Cells | 120 cells |
| Glass Thickness | 3.2 mm tempered glass |
| Encapsulant Type | EVA (ethylene vinyl acetate) |
| Frame Type | Anodized aluminium frame |
| Junction Box Diodes | 3 bypass diodes |
| Junction Box Protection Class | IP68 rated |
| Cable Cross Section | 4 mm² |
| Cable Length | 300 mm |
Certifications: Module designed to comply with mainstream IEC and UL standards for crystalline PV modules. Please refer to the official datasheet or manufacturer for the latest certification list.
Inverter Compatibility: Suitable for use with most modern string and hybrid inverters that support 1500 V DC systems. Always check inverter input limits for voltage, current, and maximum string power before final selection.
Environmental: Built for outdoor rooftop and ground mount use with IP68 junction box protection and UV stable materials. Operating temperature range from -40 °C to 85 °C supports a wide range of climate zones and environmental conditions.
Warranty: 12 year product warranty on materials and workmanship as specified by Grankia. Performance warranty terms and detailed conditions should be confirmed in the official warranty documentation or datasheet for this module series.
● Available | Contact us for current lead time, logistics options, and project pricing
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