LONGi vs Trina Solar Panels: Efficiency & Price Verdict

Two Industry Leaders Compared

LONGi and Trina Solar are both top-five global manufacturers and BloombergNEF Tier 1. Trina's Vertex series is a strong competitor to LONGi's Hi-MO lineup, making this one of the most relevant comparisons in the market.

Flagship Comparison

The LONGi figures are the range of the Hi-MO 7 models in our catalogue; the LONGi Hi-MO 7 LR8-66HGD 595–625 W datasheet and the Hi-MO 7 LR8-66HGD 625W page carry one model's complete specification.

Key Differences

Efficiency: LONGi Leads

The Hi-MO 7 models we list state 21.6% to 23.6% module efficiency against the Vertex S+'s 22.3%, so the upper Hi-MO 7 models lead by up to 1.3 points and the smallest ones sit below it. Their records name the cell technology HPDC.

Warranty: Longer Performance Cover from LONGi

Every Hi-MO 7 record states a 12-year product warranty and a 30-year performance warranty. Trina's performance warranty runs 25 years (86.5% at the end of it), so LONGi's performance cover lasts 5 years longer, while Trina's product warranty term is the longer of the two.

Panel Format

Trina uses larger 210mm wafers in the Vertex format, while LONGi uses 182mm cells. Both approaches are valid; 182mm cells offer better thermal management and easier handling.

Pricing and Total Installed Cost

LONGi Hi-MO 9 is priced at USD 0.169 per watt of rated power on this site, like every LONGi panel we sell. Total installed cost depends on balance of system: for a residential 10 kW array, LONGi needs 15 panels at 670W while Trina needs 14 panels at 700W, and Trina's heavier panels add handling cost that roughly offsets its mounting savings. At utility scale above 100 MW, Trina's larger panel format cuts panel count by about 12%, saving roughly USD 30,000/MW in mounting steel and labour — where Trina wins decisively.

Which Should You Choose?

• LONGi Hi-MO 7: Up to 23.6% efficiency, a −0.28%/°C temperature coefficient and a 30-year performance warranty. The superior choice for hot climates and long-term value.
• Trina Vertex S+: A strong alternative if local pricing is significantly favourable or if the Vertex format better suits your inverter and mounting system.

Desert Performance: Heat, Bifacial Gains and Durability

At the 70°C panel temperatures common in UAE summers, the Hi-MO 7's -0.28%/°C coefficient translates to roughly 12.6% power loss, versus Trina's comparable 13.1-13.5%. Both brands lean on the Gulf's reflective desert terrain for bifacial gains: LONGi's flagship claims up to 30% in optimal ground-mount conditions, Trina's up to 25%. For durability, both use hydrophobic anti-reflective coatings against sand and dust, carry IEC 61701 salt-mist certification for coastal sites, and Trina's Vertex frame is rated to 5400 Pa for wind and sand loading. On track record, Trina has supplied multiple phases of the Mohammed bin Rashid Al Maktoum Solar Park in Dubai, while LONGi supplies Saudi Arabia's NEOM and National Renewable Energy Program projects.

For the LONGi side of this comparison, any two of our panels can be put row against row on the compare page, and the sizing calculator shows how many modules the roof takes.