Trina Vertex S+ 440W Solar Panel

The Trina Vertex S+ 440W solar panel is part of Trina Solar’s Vertex S+ series, a lineup built around a smaller physical footprint than full-size utility panels while still delivering strong wattage per module. This makes the Trina Vertex S+ 440W solar panel especially popular for residential rooftops with limited or irregularly shaped mounting areas, as well as smaller commercial installations where full-size panels do not fit efficiently around vents, skylights, and roof edges.

Prime Solar carries Trina Vertex S+ 440W because it fills a specific need in the market for buyers who want premium N-Type cell performance without committing to the larger dimensions of high-wattage full-size modules. Homeowners frequently choose this panel when their available roof area is broken up by obstructions, since the smaller form factor allows more flexible array layouts than larger 72 and 78 cell panels.

Customers often ask how Trina Vertex S+ 440W compares to Trina’s older Vertex S PERC-based modules, and the difference comes down to cell technology and long-term degradation. The Vertex S+ line moved to N-Type cell architecture, which improves both starting efficiency and the long-term output curve compared to the P-Type PERC cells used in earlier Vertex S generations.

N-Type TOPCon cell technology overview

Every panel sold through Prime Solar is sourced through traceable distribution channels with documented batch and serial records, so buyers have 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 strong figure given its more compact physical dimensions compared to full-size 72 and 78 cell panels. This makes it well suited for arrays where every available mounting slot needs to produce as much power as possible within a constrained space.

Module efficiency reaches approximately 22.5 percent, driven by Trina’s N-Type i-TOPCon cell design combined with a multi-busbar layout that reduces internal resistance losses. This efficiency level keeps the panel competitive with larger full-size modules on a watts-per-square-foot basis, which is the metric that matters most for space-constrained installations.

Solar panel degradation and lifespan research

The solar cell type used is N-Type i-TOPCon monocrystalline silicon, Trina’s proprietary implementation of tunnel oxide passivated contact technology. This cell type has a lower boron-oxygen defect concentration than older P-Type cells, which reduces light-induced degradation in the earliest months of operation and supports stronger long-term output retention.

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. As with any panel, installers should verify Voc and Isc ratings against the selected inverter’s input voltage window before finalizing string design, particularly in cold-climate installations where open-circuit voltage rises.

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 Trina Vertex S+ 440W panel is backed by Trina’s linear power warranty, guaranteeing no more than approximately 1 percent degradation in year one and roughly 0.4 percent annually 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 Trina Vertex S+ 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.

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

Trina Vertex S+ 440W Solar Panel