JA Solar 435W vs Trina Vertex Compared
JA Solar 435W (Tier-1, n-type TOPCon, 30-yr linear) vs Trina Vertex 425W (Tier-1, PERC bifacial). Both bankable — different sweet spots.
For most Scottish domestic roofs we install JA Solar 435W: better low-light performance from n-type TOPCon, all-black aesthetic, 30-year power warranty. Trina Vertex wins on ground-mount commercial installs where bifacial yield matters.
Side-by-side spec compare
| Spec | A | B | Winner |
|---|---|---|---|
| Rated power | 435 W | 425 W | A |
| Module efficiency | 22.5% | 21.8% | A |
| Cell technology | n-type TOPCon | PERC bifacial | A |
| Low-light performance | Excellent | Good | A |
| Bifacial yield bonus | No (mono-facial) | Yes (~5-15%) | B |
| Aesthetic | All-black | Black frame / blue back | A |
| Power warranty | 30 yrs (linear) | 25 yrs (linear) | A |
| Product warranty | 15 yrs | 12 yrs | A |
| Price per panel | Premium tier | Mid tier | B |
| Best application | Domestic roofs | Ground-mount, commercial | = |
Which one is right for you?
Best low-light + 30-year warranty + all-black aesthetic.
Bifacial yield uplift makes Trina Vertex more economic per kWp.
n-type TOPCon's diffuse-light advantage is more relevant here.
Mid-tier pricing on Trina Vertex helps payback at scale.
Still not sure which is right for your house?
Tell us your roof, usage and budget — we'll tell you which fits best. Honest brand-agnostic advice.
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