JA Solar DeepBlue 4.0 Pro 440W Solar Panel

The JA Solar DeepBlue 4.0 Pro 440W solar panel is part of JA Solar’s DeepBlue 4.0 Pro series, built around N-Type cell technology in a bifacial glass-glass configuration rather than the standard glass-backsheet layout used on most residential panels. The JA Solar DeepBlue 4.0 Pro 440W solar panel captures usable sunlight on both its front and rear surfaces, generating additional output from light reflected off roofing material, ground surfaces, or light-colored rooftops beneath the panel.

Prime Solar stocks this panel because it fills a specific need for buyers pursuing ground mount arrays, solar carports, elevated tracker systems, or any installation where the rear side of the panel has meaningful exposure to reflected light. Customers frequently choose the JA Solar DeepBlue 4.0 Pro 440W solar panel over standard monofacial modules specifically for this bifacial gain, which can add measurable extra output depending on the mounting height, tilt angle, and ground surface reflectivity, often referred to as albedo.

Buyers often ask how much extra energy the bifacial design actually delivers in a typical residential setting. The bifacial gain from the JA Solar DeepBlue 4.0 Pro 440W solar panel varies significantly by installation type, with ground mount and elevated racking systems typically seeing a larger benefit than flush rooftop mounting, where the rear surface has little exposure to reflected light.

Every unit sold through Prime Solar is sourced through traceable distribution channels with documented batch and serial records, so buyers have proper documentation available if a manufacturer warranty claim is ever needed down the line.

Bifacial solar panel technology overview

Peak Power Output and Module Efficiency

Peak power output for the JA Solar DeepBlue 4.0 Pro 440W solar panel is rated at 440 watts under Standard Test Conditions on the front face, with additional output possible from the rear surface depending on installation conditions. This rated front-side wattage makes the panel a strong fit for both standard rooftop arrays and dedicated bifacial installations.

Module efficiency reaches approximately 22.3 percent on the front surface, achieved through JA Solar’s N-Type cell architecture combined with a half-cut cell layout that reduces resistive losses. The dual-glass bifacial construction also allows the panel to contribute additional energy yield beyond this front-side efficiency figure alone, which is not reflected in the standard efficiency rating.

The solar cell type used is N-Type monocrystalline silicon in a bifacial glass-glass module format. This construction differs from standard glass-backsheet panels by using tempered glass on both the front and rear surfaces, which enables light capture from both sides while also improving mechanical strength and long-term durability compared to backsheet-based designs.

Federal solar tax credit information

Certification, Durability, and Inverter Compatibility

Inverter compatibility for this panel is broad, working reliably with string inverters and microinverters from SolarEdge, Enphase, SMA, Fronius, and Growatt. Installers should confirm Voc and Isc ratings against the selected inverter’s input voltage window before finalizing string design, as with any panel installation.

Every unit ships with flash test batch certification, meaning each individual panel is tested at the factory and matched to a batch report confirming actual measured output before leaving the production line. Prime Solar retains copies of these flash test reports for every shipment received, giving buyers documentation to support any future performance or warranty inquiry.

Weather degradation rating on this panel is backed by JA Solar’s linear power warranty, guaranteeing strong first-year retention with minimal light-induced degradation and approximately 0.4 percent annual degradation thereafter, resulting in an estimated 87 to 88 percent of rated front-side output retained after 25 years. The dual-glass frame construction is rated to withstand snow loads up to 5400 pascals and wind loads up to 2400 pascals, and the fully sealed glass-glass design carries an IP68 weather-seal rating on the junction box, offering strong long-term protection against moisture, dust, and corrosion.

Shipping, Insurance, and Delivery Protection

Every JA Solar DeepBlue 4.0 Pro 440W solar panel ships under insured freight delivery, covering the full replacement value of your order against loss or damage while in transit. Carriers are selected specifically for their experience handling palletized solar equipment, and this glass-glass bifacial panel is packaged with extra care given its dual-glass construction and added weight compared to standard backsheet modules.

Signature on delivery is required for all panel shipments, creating a clear chain of custody that protects both the buyer and Prime Solar in the event a damage claim needs to be filed. We recommend inspecting the pallet at time of delivery whenever possible rather than accepting an unattended drop-off.

Before shipment, every JA Solar DeepBlue 4.0 Pro 440W panel passes a pre-shipment inspection checklist covering frame integrity, front and rear glass condition, junction box seating, and connector fit. Should any panel arrive damaged, our shipping damage claim process requires photos of both packaging and panel taken before unboxing is complete, submitted within 48 hours of delivery, after which we coordinate directly with the freight carrier and manufacturer on replacement or credit.

Browse the full range of complementary racking, inverters, and complete kits in our solar panel kits collection