LONGi vs JA Solar — Detailed Panel Comparison 2026

Two Tier 1 Giants Compared

LONGi and JA Solar are both among the world's top five solar panel manufacturers and hold BloombergNEF Tier 1 status. Both offer N-type TOPCon panels in 2026, making this a close comparison between two excellent brands.

Flagship Panel Comparison

Feature	LONGi Hi-MO 7	JA Solar DeepBlue 4.0 Pro
Cell technology	N-type TOPCon (HPBC 2.0)	N-type TOPCon
Max power	600W	585W
Max efficiency	22.8%	22.4%
Temperature coefficient	−0.29%/°C	−0.29%/°C
First-year degradation	1.0%	1.0%
Annual degradation	0.40%/year	0.40%/year
Product warranty	25 years	25 years
Performance warranty	87.4% at year 30	87.4% at year 30
Manufacturing capacity	100+ GW	75+ GW
Bifacial option	Hi-MO X6	DeepBlue 4.0 bifacial

Key Differences

Efficiency Edge: LONGi

LONGi's HPBC 2.0 cell architecture eliminates front busbars, reducing optical losses and achieving 22.8% — 0.4% higher than JA Solar's 22.4%. This translates to ~2% more power per panel area.

Manufacturing Scale: LONGi

LONGi is the world's largest solar panel manufacturer with over 100 GW of annual production capacity, providing greater supply security and economies of scale.

Price: Close

Both brands are competitively priced in the N-type TOPCon segment. JA Solar panels may be marginally cheaper in some markets, but LONGi's higher efficiency often delivers better value per watt of actual energy produced.

Which Should You Choose?

• Choose LONGi Hi-MO 7 if you want the highest available efficiency, proven performance in major UAE projects, and the industry's largest manufacturer backing your warranty.
• Choose JA Solar DeepBlue 4.0 if local pricing is significantly lower and the 0.4% efficiency difference is acceptable for your project economics.

Frequently Asked Questions

Is LONGi better than JA Solar?

LONGi offers higher peak efficiency (22.8% vs 22.4%) and larger manufacturing scale. JA Solar is a strong competitor with similar warranty terms and degradation rates. For most projects, LONGi's efficiency advantage makes it the better choice.

Are both brands available in the UAE?

Yes. Both LONGi and JA Solar have strong distribution networks in the UAE and Middle East, with panels approved for DEWA and ADDC installations.

Which has better hot-climate performance?

Both have identical temperature coefficients (−0.29%/°C), so hot-climate performance is very similar. LONGi's slightly higher base efficiency gives it a marginal advantage in absolute output.