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The LONGi Hi-MO X7 655W and 656W modules are designed to meet the increasing demand for ultra-high power output in modern photovoltaic systems. Built on advanced N-type cell technology, these modules deliver superior efficiency, stable performance, and long-term reliability for utility-scale and commercial solar projects. With power classes reaching up to 656W, the Hi-MO X7 significantly reduces the number of modules required per installation. This directly lowers balance-of-system (BOS) costs, including mounting structures, cabling, and labor, making it an ideal solution for large-scale solar plants where cost optimization and performance efficiency are critical. Parameter Specification ------------------------------------------------------------ Model LONGi Hi-MO X7 Rated Power (Pmax) 655W / 656W Module Efficiency Up to 22.5% Cell Type N-Type Monocrystalline Module Structure Double Glass (Glass-Glass) Number of Cells 132 / 144 Cells (depending on version) Maximum System Voltage 1500V DC Operating Temperature -40°C to +85°C Temperature Coefficient (Pmax) -0.29%/°C Open Circuit Voltage (Voc) ~ 50V – 52V Short Circuit Current (Isc) ~ 16A – 17A Maximum Power Voltage (Vmp) ~ 42V – 44V Maximum Power Current (Imp) ~ 15A – 16A Front Glass 2.0 mm Tempered Glass Rear Glass 2.0 mm Tempered Glass Frame Anodized Aluminum Alloy Junction Box IP68 Rated Mechanical Load (Front) 5400 Pa Mechanical Load (Rear) 2400 Pa Connector MC4 Compatible Cable Length 300 mm / Customized First Year Degradation ≤ 1% Annual Degradation ≤ 0.4% Application Utility-scale / Commercial Solar Projects . Specifications may vary slightly depending on production batch and region. For official datasheet, please contact our sales team. Custom configurations are available upon request.