JA Solar 620W N-Type Bifacial Double Glass Solar Panel

Product Overview

The JA Solar JAM66D45-620LB is a 620 W N-type bifacial double-glass solar panel from the DeepBlue 4.0 Pro range, designed for high-output residential, commercial, industrial and larger solar power installations. With a module efficiency of 23.0%, advanced 16BB multi-busbar half-cell technology and a bifacial design capable of generating power from both sides of the module, it offers high power density together with durable construction for long-term solar generation.

Key Features

• 620 W rated output: High power per module helps reduce the number of panels required to achieve a target array capacity where roof or mounting space is suitable.
• 23.0% module efficiency: High conversion efficiency makes effective use of available installation area.
• N-type 16BB MBB half-cell technology: Designed to provide strong energy yield, low degradation and reliable performance over the life of the module.
• Bifacial energy generation: The rear surface can contribute additional generation where reflected solar irradiation reaches the back of the panel.
• Double-glass construction: 2.0 mm front and rear glass provides a robust module structure and additional protection for the solar cells.
• Good high-temperature performance: A Pmax temperature coefficient of -0.290%/°C helps limit power losses as cell temperatures increase.
• IP68 junction box: Provides a high level of protection against dust and water ingress for outdoor PV installations.
• Long-term manufacturer performance support: Supplied with a 12-year product warranty and 30-year linear power output warranty.

Applications

• Residential rooftop solar power systems where the roof structure, mounting system and inverter specifications are suitable for this large-format module.
• Commercial and industrial PV installations requiring high array capacity with fewer individual modules.
• Ground-mounted and utility-scale solar arrays, including installations designed to take advantage of rear-side solar irradiation.
• Hybrid and off-grid solar power systems where the inverter, MPPT or charge controller voltage and current limits are compatible with the panel.

Why Choose This Product?

The JA Solar JAM66D45-620LB combines a high 620 W output with 23.0% module efficiency, N-type cell technology and bifacial double-glass construction. Its large-format design is particularly useful for installations where high array capacity and long-term energy production are important. The module is also backed by JA Solar's established product and linear performance warranty structure, making it a practical option for professionally designed residential, commercial and large-scale PV systems.

Important Notes

• Bifacial energy gain varies according to installation height, surface reflectivity, module spacing, shading and the amount of solar irradiation reaching the rear of the panel.
• At 2382 × 1134 mm and 33.1 kg, this is a large-format solar module. The roof structure, mounting system, handling method and available installation area should be checked before installation.
• Always confirm the module voltage, current and string configuration against the inverter, MPPT or charge controller limits before installation.
• The module is listed with IEC 61215 and IEC 61730 certification, together with JA Solar's associated ISO 9001, ISO 14001, ISO 45001 and IEC 62941 manufacturing quality certifications.
• Installation and electrical connection must be completed by appropriately qualified personnel and must comply with applicable South African wiring regulations, standards and installation requirements.
• Product specifications may be revised by the manufacturer. Confirm critical dimensions, electrical characteristics and installation requirements against the latest JA Solar datasheet when designing a system.

Technical Specifications