Product details
About This Product
The JA Solar JAM66D45-620LB 620W Bifacial Solar Panel is a high-output monocrystalline solar module designed for commercial, industrial, and large-scale solar installations. Part of JA Solar’s JAM66D45 series, this 620W panel uses 132 half-cut cells and bifacial technology to generate electricity from direct sunlight on the front and reflected light reaching the rear. It features a silver aluminum frame, transparent backsheet, and MC4-EVO2 connectors. Its 1500V DC maximum system voltage makes it suitable for appropriately engineered commercial solar arrays.
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Who This Product Suits
The JA Solar JAM66D45-620LB is suited to commercial rooftop systems, ground-mounted arrays, agricultural installations, and utility-scale solar projects where high-output modules are preferred. Its bifacial construction is particularly useful for installations with suitable rear-side clearance and reflective ground surfaces. Solar contractors and EPC installers can use this module in string inverter systems designed around its electrical characteristics, with array configuration, mounting, and wiring completed in accordance with applicable NEC requirements.
Specifications Explained
- 620W Rated Output: High-power module rating under standard test conditions, allowing substantial DC array capacity per panel.
- 132 Half-Cut Monocrystalline Cells: Cell configuration designed for efficient current collection and reduced internal electrical losses.
- Bifacial Construction: Captures sunlight from the front and additional reflected irradiance from the rear when installation conditions permit.
- Transparent Backsheet: Allows rear-side light to reach the bifacial cells while forming part of the module’s protective construction.
- 1500V DC Maximum System Voltage: Supports appropriately designed high-voltage DC string configurations, subject to inverter limits and NEC calculations.
- MC4-EVO2 Connectors: Factory-supplied DC connectors for compatible solar wiring connections.
- 12-Year Manufacturer Warranty: Product warranty coverage subject to JA Solar’s applicable warranty terms.
- 30-Year Linear Performance Warranty: Specified degradation allowance of 1% in the first year followed by 0.40% annually, subject to manufacturer warranty conditions.
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Summary
The JA Solar JAM66D45-620LB combines 620W rated output, bifacial monocrystalline technology, and a 1500V DC system rating for commercial and large-scale solar applications. Its 132 half-cut cell design, transparent backsheet, and MC4-EVO2 connectors make it a practical option for professionally engineered solar arrays. JA Solar backs the module with a 12-year manufacturer warranty and a 30-year linear performance warranty.
Further Information From The Manufacturer
JA 620w D45 Series Bifacial, 132 half cell module: silver frame, Glass Backsheet, QC 4.10-351 / MC4 Connectors This product is supplied with MC4-EVO2 connectors.
Specifications
| Power Output | 620 Watts |
| 132 Cell, BifacialMonocrystalline | |
| 35mm Depth, Silver Frame, Transparent Backsheet | |
| 1500 Volts Max Voltage | |
| Manufacturer Warranty | 12 Years |
| Performance Warranty | 1% 1st-year degradation – 30 years linear, 0.40% annual degradation over 30 years |
| Shipping Weight | 73.2 lb |
| Shipping Dimensions | 94 x 44.65 x 1.38 in |
About JA Solar
JA Solar is a major global photovoltaic manufacturer known for vertically integrated production and large-scale supply into residential, commercial and utility markets. The brand has built a strong reputation around consistent module quality, bankability and broad product availability.
JA Solar panels are widely used in the U.S. market because they offer a practical balance of performance, scale and installer familiarity. Their module lineup typically emphasises efficient cell technology, dependable output and competitive project economics.
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