LogiLink does not manufacture 550-watt or 122-cell rigid solar panels. You are likely referring to high-efficiency large-format residential and commercial solar modules (such as 550W monocrystalline panels from brands like LONGi) which typically feature 120, 144, or similar cell counts. LogiLink specializes in small portable, foldable USB solar chargers (e.g., 7W to 30W) and power stations rather than large grid-tied setups.Typical Specifications for 550W Monocrystalline PanelsPower Output: 550 WattsCell Type: Monocrystalline silicon (Half-cut / PERC technology)Module Efficiency: ~21.3% to 21.7%Dimensions: Approximately 2278 x 1134 x 35 mm