Trina Solar Vertex S+ TSM-520NEG18R.28 520Wp – pallet of 36 modules (18.72kWp)Pallet of 36 monofacial dual-glass n-type i-TOPCon modules, 520Wp each

Overview

A pallet of 36 Trina Solar TSM-520NEG18R.28 modules, 18.72kWp in total, packed in one original box. Each 108-cell module gives 520Wp at 23.4% efficiency, 41.20V Voc and 15.99A Isc, and 396W under NOCT conditions. The 1,961×1,134×30mm format stays under two metres in length at 23.5kg, which Trina designed for commercial and industrial roofs. With the manual's 1.25 factor, cables and inverter inputs must be rated for about 20A per string.

• 108 n-type i-TOPCon cells, 495–525Wp, up to 23.6%
• Under 2m long, 23.5kg, 1.6mm + 1.6mm glass
• Low-voltage design: Voc about 40–42V, Isc about 16A
• Test loads 5400Pa positive and 2400Pa negative
• 36 modules per box, 864 per 40ft container

Design and technology

The NEG18R.28 is the mid-size Vertex S+ module that Trina Solar positions for commercial and industrial roofs. Its 108 n-type i-TOPCon cells are built on Trina's 210 platform and sit between a 1.6mm anti-reflective front glass and a 1.6mm rear glass, both heat-strengthened. At 1,961×1,134×30mm it stays under two metres long, and 23.5kg keeps it manageable on a roof. The frame is black anodised aluminium and Trina rates it as monofacial.

Electrical data

The global datasheet (2026-A) covers 495–525Wp with a 0/+5W power selection and 22.3–23.6% efficiency; the EU datasheet (2024-C) lists 485–510Wp. Because each module has only 108 cells, open-circuit voltage stays near 40–42V while short-circuit current is close to 16A, so more modules fit in one string at a given inverter voltage. Coefficients are -0.29%/°C (Pmax), -0.24%/°C (Voc) and +0.04%/°C (Isc), with 1500V DC system voltage and a 30A series fuse rating.

Installation notes from the manual

Trina's Vertex user manual lists the NEG18R series among distributed-system products and prohibits ground-mounted power plants. With four clamps on the long frame and rails running across it, the clamp centrelines go in the 315–405mm zone, rated for 2400Pa uplift and 5400Pa downforce; for bolted mounting the holes used are 1300mm apart. Size cables and protection with 1.25 times the marked Isc and Voc, and check that each inverter input accepts the resulting string current of about 20A.

Warranty and packing

Both datasheets give a 30-year power warranty with at most 1% first-year and 0.4% annual degradation, or 87.4% after 30 years. The product warranty differs by document: 25 years on the EU 2024-C datasheet, 15 years on the global 2026-A datasheet that includes the 515–525W classes. Modules are packed 36 per box and 864 per 40ft container, with TS4 Plus, TS4 or MC4 EVO2 connectors depending on the certified version.

Questions and answers