---
title: "Longi Solar vs Q-Cells - Brand Comparison | ComparePV"
description: "Compare Longi Solar vs Q-Cells solar panels: full portfolio, efficiency, cell technology breakdown, warranty terms and company background."
source: "https://comparepv.com/longi-solar-vs-q-cells"
---

# Longi Solar vs Q-Cells

Longi Solar has the broader catalog (255 vs 89 models). Longi Solar leads on peak efficiency at 25.00%.


## The two companies


| Attribute | Longi Solar | Q-Cells |
| --- | --- | --- |
| Country | China | South Korea |
| Headquarters | Xi'an, Shaanxi | Seoul |
| Founded | 2000 | 1999 |
| Employees | 37,853 | 2000+ |
| Annual capacity | 85-90 GW/year | 11.2 GW/year |
| Tier 1 | yes | yes |
| Listed | Shanghai Stock Exchange: 601012 | NASDAQ: HQCL |
| Website | [https://www.longi.com](https://www.longi.com) | [https://www.qcells.com](https://www.qcells.com) |

LONGi Green Energy Technology Co., Ltd. is a world-leading solar technology company that manufactures monocrystalline silicon wafers and modules. The company is committed to providing high-efficiency and reliable clean energy solutions for large-scale power plants, various industries, and households. LONGi aims to be...

Qcells is a renowned global provider of complete energy solutions, specializing in solar cells and modules, energy storage solutions, downstream project business, and energy retail. The company has a strong heritage dating back to its foundation in Germany and has become a leader in technology innovations. As an...


## Catalog & Power


| Measure | Longi Solar | Q-Cells | Margin |
| --- | --- | --- | --- |
| Panel Models | 255 | 89 | +166 |
| Max Power | 670 W | 675 W | +5 W |
| Avg Power | 544 W | 468 W | +75 W |


## Efficiency


| Measure | Longi Solar | Q-Cells | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 25.00% | 23.20% | +1.80 pp |
| Avg Efficiency | 22.65% | 21.21% | +1.43 pp |


## Reliability & Warranty


| Measure | Longi Solar | Q-Cells | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.291%/°C | -0.325%/°C | +0.034 |
| Bifacial Share | 101 (40%) | 35 (39%) | +0 pp |
| Avg Warranty | 27.8 yrs | 27.0 yrs | +0.9 yr |


## Efficiency distribution

Longi Solar skews to higher efficiency: 43% of lineup is 23%+


| Efficiency band | Longi Solar | Q-Cells |
| --- | --- | --- |
| \<20% | 3 (1.2%) | 7 (7.9%) |
| 20-21% | 26 (10.2%) | 29 (32.6%) |
| 21-22% | 47 (18.4%) | 30 (33.7%) |
| 22-23% | 70 (27.5%) | 21 (23.6%) |
| 23%+ | 109 (42.7%) | 2 (2.2%) |


## Power distribution

Longi Solar offers more 600W+ panels (38% of lineup)


| Power band | Longi Solar | Q-Cells |
| --- | --- | --- |
| \<400W | 8 (3.1%) | 20 (22.5%) |
| 400-499W | 81 (31.8%) | 41 (46.1%) |
| 500-599W | 70 (27.5%) | 11 (12.4%) |
| 600-699W | 96 (37.6%) | 17 (19.1%) |


## Cell technology

Dominant cell tech: **N-type** (42%)

Dominant cell tech: **PERC** (43%)


| Technology | Longi Solar | Q-Cells |
| --- | --- | --- |
| N-type | 107 (42.0%) | 23 (25.8%) |
| Unknown | 55 (21.6%) | 20 (22.5%) |
| PERC | 51 (20.0%) | 38 (42.7%) |
| Back Contact | 42 (16.5%) | 0 |
| TOPCon | 0 | 8 (9.0%) |


## Top panels, Longi Solar


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 | 24.8 | -0.260 | Monocrystalline |
| 2 | [LR8-66HYD-670M](https://comparepv.com/panel/longi-lr8-66hyd-670m) | 670 | 24.8 | -0.260 | Monocrystalline |
| 3 | [LR7-72HVH-670M](https://comparepv.com/panel/longi-lr7-72hvh-670m) | 670 | 24.8 | -0.260 | Monocrystalline |
| 4 | [LR7-72HVHF-665M](https://comparepv.com/panel/longi-lr7-72hvhf-665m) | 665 | 24.6 | -0.260 | Monocrystalline |
| 5 | [LR7-72HVDF-665M](https://comparepv.com/panel/longi-lr7-72hvdf-665m) | 665 | 24.6 | -0.260 | Monocrystalline |
| 6 | [LR8-66HVD-665M](https://comparepv.com/panel/longi-lr8-66hvd-665m) | 665 | 24.6 | -0.260 | Monocrystalline |
| 7 | [LR8-66HYD-665M](https://comparepv.com/panel/longi-lr8-66hyd-665m) | 665 | 24.6 | -0.260 | Monocrystalline |
| 8 | [LR7-72HVD-665M](https://comparepv.com/panel/longi-lr7-72hvd-665m) | 665 | 24.6 | -0.260 | Monocrystalline |
| 9 | [LR7-72HVH-665M](https://comparepv.com/panel/longi-lr7-72hvh-665m) | 665 | 24.6 | -0.260 | Monocrystalline |
| 10 | [LR7-72HVHF-660M](https://comparepv.com/panel/longi-lr7-72hvhf-660m) | 660 | 24.4 | -0.260 | Monocrystalline |


## Top panels, Q-Cells


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [Q.PEAK DUO ML-G12S.3 / BFG 675](https://comparepv.com/panel/q-cells-q-peak-duo-ml-g12s-3-bfg-675) | 675 | 21.7 | -0.340 | Monocrystalline |
| 2 | [Q.PEAK DUO ML-G12S.3 / BFG 670](https://comparepv.com/panel/q-cells-q-peak-duo-ml-g12s-3-bfg-670) | 670 | 21.6 | -0.340 | Monocrystalline |
| 3 | [Q.PEAK DUO ML-G12S.3 / BFG 665](https://comparepv.com/panel/q-cells-q-peak-duo-ml-g12s-3-bfg-665) | 665 | 21.4 | -0.340 | Monocrystalline |
| 4 | [Q.PEAK DUO ML-G12S.3 / BFG 660](https://comparepv.com/panel/q-cells-q-peak-duo-ml-g12s-3-bfg-660) | 660 | 21.2 | -0.340 | Monocrystalline |
| 5 | [Q.PEAK DUO ML-G12S.3 / BFG 655](https://comparepv.com/panel/q-cells-q-peak-duo-ml-g12s-3-bfg-655) | 655 | 21.1 | -0.340 | Monocrystalline |
| 6 | [Q.PEAK DUO ML-G12S.3 / BFG 650](https://comparepv.com/panel/q-cells-q-peak-duo-ml-g12s-3-bfg-650) | 650 | 20.9 | -0.340 | Monocrystalline |
| 7 | [Q.TRON XL-G2.3 / BFG 645](https://comparepv.com/panel/q-cells-q-tron-xl-g2-3-bfg-645) | 645 | 23.1 | -0.290 | Monocrystalline |
| 8 | [Q.TRON XL-G2.3 / BFG 640](https://comparepv.com/panel/q-cells-q-tron-xl-g2-3-bfg-640) | 640 | 22.9 | -0.290 | Monocrystalline |
| 9 | [Q.TRON XL-G2.3 / BFG 635](https://comparepv.com/panel/hanwha-q-cells-america-inc-q-tron-xl-g2-3-bfg-635) | 635 | 22.7 | -0.300 | Monocrystalline |
| 10 | [Q.TRON XL-G2.3 / BFG 630](https://comparepv.com/panel/hanwha-q-cells-america-inc-q-tron-xl-g2-3-bfg-630) | 630 | 22.6 | -0.300 | Monocrystalline |


## Summary

Longi Solar, headquartered in Xi'an, China, was founded in 2000 and has grown into the world's largest solar manufacturer by shipment volume. It holds BloombergNEF Double Tier 1 status - covering both modules and energy storage - and shipped over 63 GW of solar cells and modules in the first nine months of 2025 alone, representing roughly 24% year-on-year growth. Q CELLS was originally founded in Germany in 1999 and is now owned by South Korea's Hanwha Group, operating under the Hanwha Q CELLS banner. It also carries BloombergNEF Tier 1 certification and runs the largest solar manufacturing facility in the Western Hemisphere in Dalton, Georgia, holding the number-one market share position in both US residential and commercial segments according to Wood Mackenzie. On global production scale and overall institutional footprint, Longi Solar holds a clear edge.

Longi's current flagship lineup centers on the Hi-MO series, with the Hi-MO 9 and Hi-MO X10 built on the company's proprietary HPBC 2.0 (Hybrid Passivated Back Contact) cell architecture - a back-contact technology that the company positions as outperforming conventional TOPCon in energy yield and LCOE at utility scale. The Hi-MO X10 Artist, part of the new EcoLife residential brand launched in 2025, achieves up to 24.5% efficiency and carries a 30-year product and power warranty. Q CELLS offers a two-tier portfolio: the Q.PEAK DUO family, based on its established Q.ANTUM PERC technology, targets cost-sensitive residential and commercial buyers, while the Q.TRON series uses n-type TOPCon cells and delivers efficiency up to 22.5% with temperature coefficients as low as -0.29% per degree Celsius - a notable advantage in hot climates.

For utility-scale and large commercial projects where maximum energy density and lowest LCOE are the deciding factors, Longi's HPBC 2.0 modules present a compelling case. For residential buyers in the US market or for projects requiring domestically manufactured panels under current trade policy, Q CELLS is often the practical default, given its US production footprint and deep installer network. For most standard rooftop installations outside those specific contexts, both brands are effectively interchangeable - both are Tier 1 bankable, both carry strong warranties, and the choice will typically come down to local pricing and installer availability.

Written by claude-sonnet from the figures above.


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- [Longi Solar vs A.B. Energy](https://comparepv.com/longi-solar-vs-a-b-energy)
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- [AIKO vs Q-Cells](https://comparepv.com/aiko-vs-q-cells)
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- [ARTsolar vs Q-Cells](https://comparepv.com/artsolar-vs-q-cells)


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Source: https://comparepv.com/longi-solar-vs-q-cells

Not in this file, on the page: the distributions above drawn as charts.