Trina Solar Vertex S+ TSM-450 NEG9R.28 N-Type

Trina Solar is the world's largest solar panel manufacturer by shipped volume, and the Vertex S+ is their current-generation N-Type TOPCon residential platform. The TSM-450 NEG9R.28 variant delivers 450W at 22.5% module efficiency in a 1762×1134mm all-black 54-cell format with black frame and black backsheet.

N-Type TOPCon cells degrade at roughly 0.40%/year versus 0.55%/year for Mono PERC — the compound difference over a 25-year warranty period is meaningful real-world generation. The 25-year product / 30-year performance warranty matches the best in the segment.

Who it suits

Homeowners who want a balanced combination of current technology, strong aesthetics, and a well-recognised brand. Trina's global market position means installer familiarity is high and warranty support is well-developed.

What I'd watch for

The Vertex S+ range includes multiple variants — confirm with your installer that you're specifying the NEG9R.28 N-Type version (vs the older PERC Vertex S variants like the DE09R.05 which look similar but are last-generation cell technology).