JA Solar JAM66D45 LB 620W N-Type Double Glass Bifacial Module(0.42/W)

The JA Solar JAM66D45 LB 620W is a next-generation N-Type double glass bifacial solar panel designed for high-power commercial, industrial, and utility-scale solar projects. Built on JA Solar's DeepBlue 4.0 Pro platform, this module delivers superior energy yield, long-term reliability, and lower levelized cost of electricity (LCOE).

Powered by advanced N-Type TOPCon half-cell technology across a 132 (6×22) cell configuration, the JAM66D45 LB achieves cell conversion efficiency approaching 26% and a module efficiency of up to 23.0%, ensuring maximum output per square meter. Key electrical parameters at STC include an open-circuit voltage (Voc) of 48.5V, short-circuit current (Isc) of 16.13A, maximum power voltage (Vmp) of 40.21V, and maximum power current (Imp) of 15.42A. The bifacial double-glass design enables energy generation from both sides of the panel, adding meaningful rear-side power gain depending on ground albedo and installation environment.

This solar module features excellent temperature performance with a low power temperature coefficient of −0.29%/°C, delivering stable output in hot climates. It also offers very low LID, improved low-irradiance response, and enhanced resistance to environmental stress, making it ideal for long-term outdoor operation.

Engineered for durability, the JAM66D45 LB is rated for a maximum static load of 5400 Pa on the front (snow) and 2400 Pa on the rear (wind), and is backed by a 12-year product warranty and a 30-year linear power output warranty (1% first-year degradation, 0.4% annual thereafter), ensuring reliable energy generation for decades.

With a 1500V max system voltage, a footprint of 2382 × 1134 × 30mm, and a weight of approximately 33.1 kg, the JA Solar JAM66D45 LB 620W module is a premium choice for solar power plants, large rooftops, and ground-mounted systems demanding high efficiency, durability, and strong long-term returns.