---
title: "GCL vs Tongwei - Brand Comparison | ComparePV"
description: "Compare GCL vs Tongwei solar panels: full portfolio, efficiency, cell technology breakdown, warranty terms and company background."
source: "https://comparepv.com/gcl-vs-tongwei"
---

# GCL vs Tongwei

GCL has the broader catalog (232 vs 122 models). GCL leads on peak efficiency at 24.50%.


## The two companies


| Attribute | GCL | Tongwei |
| --- | --- | --- |
| Country | China | China |
| Headquarters | Suzhou/Hong Kong | Chengdu |
| Founded | 1990 | 2013 |
| Employees | 6000+ |  |
| Annual capacity | 30+ GW/year |  |
| Tier 1 | yes | yes |
| Listed | Hong Kong Stock Exchange/Shenzhen Stock Exchange: 03800.HK/002506.SZ | SSE: 600438 |
| Website | [http://www.gcltech.com/](http://www.gcltech.com/) | [https://en.tongwei.com.cn](https://en.tongwei.com.cn) |

GCL is a global company focusing on green energy and high-efficiency photovoltaic materials. They are known for their innovation in polysilicon and wafer technologies, with a focus on low-carbon solutions. GCL is committed to building a low-carbon PV value chain and advancing global clean energy transformation.


## Catalog & Power


| Measure | GCL | Tongwei | Margin |
| --- | --- | --- | --- |
| Panel Models | 232 | 122 | +110 |
| Max Power | 740 W | 750 W | +10 W |
| Avg Power | 558 W | 584 W | +25 W |


## Efficiency


| Measure | GCL | Tongwei | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 24.50% | 24.20% | +0.30 pp |
| Avg Efficiency | 22.03% | 22.59% | +0.56 pp |


## Reliability & Warranty


| Measure | GCL | Tongwei | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.320%/°C | -0.284%/°C | +0.036 |
| Bifacial Share | 151 (65%) | 84 (69%) | +4 pp |
| Avg Warranty | 28.4 yrs | 29.5 yrs | +1.2 yr |


## Efficiency distribution

Tongwei skews to higher efficiency: 41% of lineup is 23%+


| Efficiency band | GCL | Tongwei |
| --- | --- | --- |
| \<20% | 2 (0.9%) | 2 (1.6%) |
| 20-21% | 43 (18.5%) | 6 (4.9%) |
| 21-22% | 73 (31.5%) | 14 (11.5%) |
| 22-23% | 48 (20.7%) | 50 (41.0%) |
| 23%+ | 66 (28.4%) | 50 (41.0%) |


## Power distribution

Tongwei offers more 600W+ panels (53% of lineup)


| Power band | GCL | Tongwei |
| --- | --- | --- |
| \<400W | 6 (2.6%) | 0 |
| 400-499W | 60 (25.9%) | 41 (33.6%) |
| 500-599W | 63 (27.2%) | 16 (13.1%) |
| 600-699W | 81 (34.9%) | 33 (27.0%) |
| 700W+ | 22 (9.5%) | 32 (26.2%) |


## Cell technology

Dominant cell tech: **TOPCon** (47%)

Dominant cell tech: **TOPCon** (47%)


| Technology | GCL | Tongwei |
| --- | --- | --- |
| TOPCon | 108 (46.6%) | 57 (46.7%) |
| PERC | 102 (44.0%) | 10 (8.2%) |
| N-type | 10 (4.3%) | 44 (36.1%) |
| HJT | 7 (3.0%) | 5 (4.1%) |
| BIPV | 5 (2.2%) | 0 |
| Unknown | 0 | 6 (4.9%) |


## Top panels, GCL


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [GCL-NT12/66GDF-740](https://comparepv.com/panel/gcl-gcl-nt12-66gdf-740) | 740 | 23.8 | -0.290 | Monocrystalline |
| 2 | [GCL-NT12/66GDF-735](https://comparepv.com/panel/gcl-gcl-nt12-66gdf-735) | 735 | 23.7 | -0.290 | Monocrystalline |
| 3 | [GCL-NT12/66GDF-730](https://comparepv.com/panel/gcl-gcl-nt12-66gdf-730) | 730 | 23.5 | -0.290 | Monocrystalline |
| 4 | [NT12/66GDF-730](https://comparepv.com/panel/gcl-nt12-66gdf-730) | 730 | 23.5 | -0.290 | Monocrystalline |
| 5 | [GCL-NT12/66GDF-725](https://comparepv.com/panel/gcl-gcl-nt12-66gdf-725) | 725 | 23.3 | -0.290 | Monocrystalline |
| 6 | [NT12/66GDF-725](https://comparepv.com/panel/gcl-nt12-66gdf-725) | 725 | 23.3 | -0.290 | Monocrystalline |
| 7 | [GCL-NT12/66GDF 725](https://comparepv.com/panel/gcl-gcl-nt12-66gdf-725-1) | 725 | 23.3 | -0.290 | Monocrystalline |
| 8 | [GCL-NH12/66GDF-720](https://comparepv.com/panel/gcl-gcl-nh12-66gdf-720) | 720 | 23.2 | -0.240 | Monocrystalline |
| 9 | [GCL-NT12/66GDF-720](https://comparepv.com/panel/gcl-gcl-nt12-66gdf-720) | 720 | 23.2 | -0.290 | Monocrystalline |
| 10 | [NT12/66GDF-720](https://comparepv.com/panel/gcl-nt12-66gdf-720) | 720 | 23.2 | -0.290 | Monocrystalline |


## Top panels, Tongwei


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [TWMNF-66HD750](https://comparepv.com/panel/tongwei-solar-twmnf-66hd750) | 750 | 24.1 | -0.280 | Monocrystalline |
| 2 | [TWMNF-66HD745](https://comparepv.com/panel/tongwei-solar-twmnf-66hd745) | 745 | 24.0 | -0.280 | Monocrystalline |
| 3 | [TWMNF-66HD740](https://comparepv.com/panel/tongwei-solar-twmnf-66hd740) | 740 | 23.8 | -0.280 | Monocrystalline |
| 4 | [TWMHF-66HD740X](https://comparepv.com/panel/tw-solar-twmhf-66hd740x) | 740 | 23.8 | -0.240 | Monocrystalline |
| 5 | [THC G12-66 Bifacial](https://comparepv.com/panel/tongwei-thc-g12-66-bifacial) | 740 | 23.8 | -0.280 | Monocrystalline |
| 6 | [TWMNF-66HD735](https://comparepv.com/panel/tongwei-solar-twmnf-66hd735) | 735 | 23.7 | -0.280 | Monocrystalline |
| 7 | [TWMHF-66HD735X](https://comparepv.com/panel/tw-solar-twmhf-66hd735x) | 735 | 23.7 | -0.240 | Monocrystalline |
| 8 | [TWMHF-66HD730X](https://comparepv.com/panel/tw-solar-twmhf-66hd730x) | 730 | 23.5 | -0.240 | Monocrystalline |
| 9 | [TWMNF-66HD730](https://comparepv.com/panel/tongwei-solar-twmnf-66hd730) | 730 | 23.5 | -0.280 | Monocrystalline |
| 10 | [TWMNF-66HD725](https://comparepv.com/panel/tongwei-solar-twmnf-66hd725) | 725 | 23.3 | -0.280 | Monocrystalline |


## Summary

GCL, formally GCL System Integration Technology, is a Chinese manufacturer headquartered in Jiangsu province and part of the broader GCL Group conglomerate. The company has built a module production capacity of roughly 30 GW per year and ranks among the top-ten global module producers by shipment volume. GCL holds BloombergNEF Tier 1 status, making it a bankable choice for project-financed installations worldwide. Tongwei Solar, the photovoltaic arm of Tongwei Group based in Chengdu, traces its origins to 1982, when the parent company operated primarily in agribusiness and aquaculture before pivoting aggressively into solar. Today Tongwei is the world's largest solar cell manufacturer by shipment, with cell production capacity exceeding 90 GW and module capacity at approximately 85 GW as of mid-2025. It has held BloombergNEF Tier 1 status continuously, earned Kiwa PVEL Top Performer recognition across all tested categories in 2025, and has appeared on the Fortune Global 500 for three consecutive years, ranking 479th in 2025. By any measure of institutional scale and vertical integration, Tongwei carries the stronger global footprint.

GCL's current commercial lineup spans roughly 380 W to 680 W. Newer series such as the ASTRO N7 deploy N-type TOPCon cell technology and reach module efficiencies of up to around 23.3%, covering residential rooftop, commercial and industrial (C&I), and utility-scale ground-mount segments, with dual-glass bifacial variants available for larger projects. Tongwei Solar markets its TNC and THC series from approximately 400 W to 750 W, built primarily on N-type TOPCon cells. The breadth of Tongwei's lineup - backed by its unmatched in-house cell supply - makes it a particularly strong fit for large utility-scale and C&I procurement where cell quality consistency across high-volume orders is a differentiator.

For most international buyers, both brands are credible Tier 1 options and effectively interchangeable for standard residential or small commercial projects. Where procurement scale, supply-chain independence, and third-party reliability scores are determining factors, Tongwei holds a measurable edge. Where price competitiveness or established distributor relationships tip the decision, GCL remains a fully bankable and well-supported alternative.

Written by claude-sonnet from the figures above.


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- [GCL vs A.B. Energy](https://comparepv.com/gcl-vs-a-b-energy)
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- [AIKO vs Tongwei](https://comparepv.com/aiko-vs-tongwei)
- [GCL vs AKCOME](https://comparepv.com/gcl-vs-akcome)
- [ARTsolar vs Tongwei](https://comparepv.com/artsolar-vs-tongwei)


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Source: https://comparepv.com/gcl-vs-tongwei

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