LONGi Hi-MO X6 440W Solar Panel

The LONGi Hi-MO X6 440W solar panel is part of LONGi’s next-generation Hi-MO X series, built around back-contact cell technology that eliminates visible front-side busbars for a cleaner, more uniform appearance. The LONGi Hi-MO X6 440W solar panel appeals strongly to homeowners in HOA-restricted neighborhoods or anyone installing on a highly visible roof section, since the all-black finish reads as more premium than traditional busbar-visible panels.

Prime Solar stocks this panel because it fills a growing demand for buyers who care about both performance and aesthetics equally. Customers frequently choose the LONGi Hi-MO X6 440W solar panel over standard TOPCon panels specifically because of the clean front-side appearance, even when the underlying efficiency numbers between competing technologies are close.

Buyers often ask how the Hi-MO X6 differs from LONGi’s earlier Hi-MO 6 and Hi-MO 7 lines. The X6 series moves to HPBC, or Hybrid Passivated Back Contact, cell architecture, which relocates the electrical contacts to the rear of the cell. This not only improves the panel’s visual appearance but also reduces shading losses from front-side grid lines, contributing to a measurable efficiency gain over front-contact designs.

Back contact solar cell technology overview

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

Peak Power Output and Module Efficiency

Peak power output for this panel is rated at 440 watts under Standard Test Conditions, a competitive figure for a panel prioritizing aesthetic appearance alongside performance. This wattage level suits mid-size residential arrays where visual uniformity across the roof matters as much as raw output.

Module efficiency reaches approximately 22.8 percent, made possible by the back-contact cell design that removes front-side shading losses typically caused by metal grid lines and busbars on conventional panels. This efficiency figure places the panel among the higher-performing modules currently available in the premium aesthetic category.

The solar cell type LONGi Hi-MO X6 440W used is N-Type HPBC monocrystalline silicon, LONGi’s back-contact implementation built on an N-Type wafer base. This cell type combines the lower degradation characteristics common to N-Type technology with the visual and shading benefits of a back-contact layout, making it distinct from both standard PERC and standard TOPCon front-contact 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 LONGi’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 output retained after 25 years. The frame is built from anodized aluminum alloy rated to withstand snow loads up to 5400 pascals and wind loads up to 2400 pascals, and the junction box and backsheet carry an IP68 weather-seal rating that protects internal wiring from moisture, dust, and corrosion throughout decades of outdoor use.

Shipping, Insurance, and Delivery Protection

Every LONGi Hi-MO X6 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, since rough handling remains the most common cause of hidden microcracks, and this panel’s back-contact cells warrant the same careful handling as any premium module.

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 panel passes a pre-shipment inspection checklist covering frame integrity, 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

LONGi Hi-MO X6 440W Solar Panel