Longi vs Trina Solar panels Perth: Hi-MO 6 vs Vertex N compared
Longi and Trina Solar are Perth's two most commonly installed mid-tier Chinese TOPCon panel brands. This guide compares the Longi Hi-MO 6 and Trina Vertex N — warranty terms, performance specs, Perth pricing, and which suits different buyers.

Longi Green Energy and Trina Solar are two of the world's largest solar manufacturers by shipment volume, and both are heavily represented in Perth residential quotes. In the mid-tier segment (below Q CELLS and REC, above Jinko and JA Solar on warranty terms), they're the primary alternatives. Here's the comparison.
The current products
Longi Hi-MO 6
Longi's current residential product is the Hi-MO 6 series — TOPCon n-type cells with bifacial capability:
| Spec | Longi Hi-MO 6 | |---|---| | Wattage range | 415–455W | | Cell technology | TOPCon (n-type, HPBC variant on some models) | | Efficiency | 22.0–23.3% | | Temperature coefficient | -0.29%/°C | | Product warranty | 12–15 years (model dependent) | | Performance warranty | 30 years | | First year output | ≥98% | | Annual degradation | ≤0.40%/year | | Year 30 output | ≥87.4% |
Note on warranty: The Longi Hi-MO 6 product warranty varies by model — some are 12 years, some are 15 years. Confirm the specific product warranty for the model your installer is quoting.
What Trina Solar Vertex N offers
Trina Solar's current residential products include the Vertex N and Vertex S+ series:
| Spec | Trina Vertex N | Trina Vertex S+ | |---|---|---| | Wattage range | 415–450W | 390–415W | | Cell technology | TOPCon (n-type) | TOPCon (n-type) | | Efficiency | 21.9–22.5% | 21.3–22.5% | | Temperature coefficient | -0.29%/°C | -0.30%/°C | | Product warranty | 25 years | 15 years | | Performance warranty | 25 years | 25 years | | Annual degradation | ≤0.40%/year | ≤0.45%/year |
The Trina Vertex N's 25-year product warranty is a meaningful differentiator from Longi (12–15 years).
Head-to-head comparison
| Factor | Longi Hi-MO 6 | Trina Vertex N | |---|---|---| | Cell technology | TOPCon (n-type) | TOPCon (n-type) | | Temperature coefficient | -0.29%/°C | -0.29%/°C | | Product warranty | 12–15 years | 25 years | | Performance warranty | 30 years | 25 years | | Annual degradation | ≤0.40%/year | ≤0.40%/year | | Bifacial option | Yes | Yes | | All-black option | Limited | Yes (Vertex N black) | | Perth installer familiarity | Very high | Very high | | Perth pricing difference | Comparable, Longi often slightly cheaper | Comparable, Trina slightly higher |
Key differences
Product warranty: 25 years vs 12–15 years
This is the most significant practical difference. Trina Vertex N's 25-year product warranty means manufacturing defects are covered for 25 years. Longi's 12–15 year product warranty means defect coverage ends 10–13 years earlier.
For a Perth installation in 2026:
- Longi product warranty ends: 2038–2041
- Trina Vertex N product warranty ends: 2051
For Perth homeowners planning to own for 20+ years, Trina's longer product warranty provides meaningful protection. For buyers with a 12-year horizon (typical before property decisions change), Longi's warranty matches the ownership period.
Performance warranty terms
Interestingly, Longi's performance warranty runs to 30 years vs Trina's 25 years — but both guarantee ≤0.40%/yr degradation. At year 25, both guarantee ≥87–89% output. Longi's extra 5 years of performance warranty (years 25–30) is at a minimum threshold level.
Perth pricing
Both Longi and Trina are competitively priced. Approximate 2026 Perth prices for the panel hardware (excluding installation):
- Longi Hi-MO 6 (415–430W): approximately $0.28–$0.35/W
- Trina Vertex N (415–440W): approximately $0.30–$0.37/W
For a 6.6kW system (16 panels), the Longi vs Trina hardware price difference is typically $100–$300. Installation labour is the same for both. The price gap rarely exceeds $400 total system cost.
Which to choose
Choose Longi Hi-MO 6 when:
- System price optimisation is the primary driver (typically $100–$300 less)
- You plan to own the home for 12–15 years (within product warranty)
- Your installer has specific Longi experience and service relationships
Choose Trina Vertex N when:
- You're investing in the system for 20+ years (25yr product warranty pays off)
- The small price premium ($100–$300) is manageable
- All-black variant matters (Trina's black frame option is more widely available)
When it doesn't matter:
- Both brands are on-roof and performing within 6 months of installation — neither degrades faster
- The choice between Longi and Trina is less important than the quality of the installation itself
Longi Hi-MO 6 and Trina Vertex N are both strong mid-tier TOPCon options for Perth homes. The main practical difference is product warranty length: Trina's 25-year product warranty outperforms Longi's 12–15 years for long-term owners. For most Perth buyers, the installation quality and system design matter more than choosing between these two brands — both perform well in Perth conditions.
Calculate your savings
See how much you could save with solar, batteries, and smart tariff choices



