JA Solar JAM72D40 series, a key part of the advanced Deep Blue 4.0 Pro family, is a high-performance photovoltaic module designed for a wide range of applications, including commercial and industrial (C&I) rooftops, large-scale ground-mounted power plants, and utility projects. By integrating cutting-edge N-type TOPCon (Tunnel Oxide Passivated Contact) cell technology with a bifacial dual-glass construction, this module delivers superior energy yield, exceptional reliability, and a reduced Levelized Cost of Energy (LCOE).

Advanced N-Type TOPCon Cell Technology

Moving beyond conventional PERC cells, the JAM72D40 utilizes N-type TOPCon technology, which provides significant performance benefits:

Virtually No Light-Induced Degradation (LID): N-type cells are inherently resistant to LID, ensuring the module operates at near-peak capacity from the moment of installation.

Superior Temperature Coefficient: With a temperature coefficient of Pmax at -0.29%/°C to -0.30%/°C, the module maintains higher power output in hot climates, outperforming standard p-type modules on high-temperature days.

Excellent Low-Light Performance: The technology is optimized for superior response in low-light conditions, such as cloudy mornings, hazy afternoons, and winter days, effectively extending the productive hours of the solar plant.

Bifacial Dual-Glass Design

The module features a robust construction with 2.0mm tempered glass on both the front and back. This design offers two major advantages:

Harvest Energy from Both Sides: The bifacial capability allows the rear side to capture albedo (reflected light) from the ground, roof, or snow, boosting total energy yield by up to 30% depending on the installation’s reflective conditions.

Enhanced Durability and Reliability: The symmetrical glass-glass structure provides superior protection against mechanical stress, moisture ingress, and harsh environmental conditions. It is rigorously tested to withstand snow loads of up to 5400 Pa and wind loads of up to 2400 Pa, ensuring long-term performance in diverse climates.

Advanced Cell Architecture

The JAM72D40 incorporates half-cell and multi-busbar (MBB) technologies:

Half-Cell Configuration: The 144 half-cells (arranged in a 6×24 matrix) reduce internal resistive losses and improve current collection. This design also enhances shading tolerance, minimizing the impact of partial obstruction on energy output.

Multi-Busbar (MBB) Technology: The use of multiple busbars shortens the current travel path within the cell, leading to lower series resistance, better power collection, and improved reliability.

Quality and Reliability

As a Tier-1 bankable manufacturer, JA Solar ensures the JAM72D40 series meets the highest international standards for quality and performance.

Certifications: The module is certified according to IEC 61215 and IEC 61730, and JA Solar operates under strict quality management systems including ISO 9001, ISO 14001, and ISO 45001. It is also certified for harsh environments, including resistance to salt mist, ammonia, sand, and dust.

Warranty: Product Warranty: 12 years. Linear Performance Warranty: 30 years.

Degradation Rate: The module guarantees a first-year degradation of only 1% and an annual degradation of just 0.4% thereafter, ensuring at least 87.4% of nominal power output remains after 30 years.