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

# GCL vs Heckert Solar

GCL has the broader catalog (232 vs 155 models). GCL leads on peak efficiency at 24.50%. GCL leans bifacial (65% of lineup).


## The two companies


| Attribute | GCL | Heckert Solar |
| --- | --- | --- |
| Country | China | Germany |
| Headquarters | Suzhou/Hong Kong | Chemnitz |
| Founded | 1990 | 1992 |
| Employees | 6000+ | 201 |
| Annual capacity | 30+ GW/year | 0.8 GW/year |
| Tier 1 | yes |  |
| Listed | Hong Kong Stock Exchange/Shenzhen Stock Exchange: 03800.HK/002506.SZ |  |
| Website | [http://www.gcltech.com/](http://www.gcltech.com/) | [https://www.heckertsolar.com/en/](https://www.heckertsolar.com/en/) |

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.

Heckert Solar is a German company based in Chemnitz, Saxony, specializing in the development, production and distribution of solar modules. Founded in 1992, the company has become a leading supplier of photovoltaic products, serving customers in over 120 countries. They manufacture high-quality, durable, and efficient...


## Catalog & Power


| Measure | GCL | Heckert Solar | Margin |
| --- | --- | --- | --- |
| Panel Models | 232 | 155 | +77 |
| Max Power | 740 W | 715 W | +25 W |
| Avg Power | 558 W | 420 W | +138 W |


## Efficiency


| Measure | GCL | Heckert Solar | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 24.50% | 24.30% | +0.20 pp |
| Avg Efficiency | 22.03% | 21.43% | +0.60 pp |


## Reliability & Warranty


| Measure | GCL | Heckert Solar | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.320%/°C | -0.318%/°C | +0.002 |
| Bifacial Share | 151 (65%) | 65 (42%) | +23 pp |
| Avg Warranty | 28.4 yrs | 27.1 yrs | +1.3 yr |


## Efficiency distribution

GCL skews to higher efficiency: 28% of lineup is 23%+


| Efficiency band | GCL | Heckert Solar |
| --- | --- | --- |
| \<20% | 2 (0.9%) | 27 (17.4%) |
| 20-21% | 43 (18.5%) | 54 (34.8%) |
| 21-22% | 73 (31.5%) | 3 (1.9%) |
| 22-23% | 48 (20.7%) | 44 (28.4%) |
| 23%+ | 66 (28.4%) | 27 (17.4%) |


## Power distribution

GCL offers more 600W+ panels (44% of lineup)


| Power band | GCL | Heckert Solar |
| --- | --- | --- |
| \<400W | 6 (2.6%) | 64 (41.3%) |
| 400-499W | 60 (25.9%) | 83 (53.5%) |
| 500-599W | 63 (27.2%) | 0 |
| 600-699W | 81 (34.9%) | 4 (2.6%) |
| 700W+ | 22 (9.5%) | 4 (2.6%) |


## Cell technology

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

Dominant cell tech: **TOPCon** (34%)


| Technology | GCL | Heckert Solar |
| --- | --- | --- |
| TOPCon | 108 (46.6%) | 52 (33.5%) |
| PERC | 102 (44.0%) | 46 (29.7%) |
| N-type | 10 (4.3%) | 2 (1.3%) |
| HJT | 7 (3.0%) | 0 |
| BIPV | 5 (2.2%) | 0 |
| Unknown | 0 | 35 (22.6%) |
| Back Contact | 0 | 20 (12.9%) |


## 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, Heckert Solar


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [ZEUS 2.2 715](https://comparepv.com/panel/heckert-solar-zeus-2-2-715) | 715 | 23.0 | -0.280 | Monocrystalline |
| 2 | [ZEUS 2.2-715](https://comparepv.com/panel/heckert-solar-zeus-2-2-715-1) | 715 | 23.0 | -0.280 | Monocrystalline |
| 3 | [ZEUS 2.2 710](https://comparepv.com/panel/heckert-solar-zeus-2-2-710) | 710 | 22.9 | -0.280 | Monocrystalline |
| 4 | [ZEUS 2.2-710](https://comparepv.com/panel/heckert-solar-zeus-2-2-710-1) | 710 | 22.9 | -0.280 | Monocrystalline |
| 5 | [ZEUS 2.1-640](https://comparepv.com/panel/heckert-solar-zeus-2-1-640) | 640 | 23.7 | -0.280 | Monocrystalline |
| 6 | [ZEUS 2.1 640W](https://comparepv.com/panel/heckert-solar-zeus-2-1-640w) | 640 | 23.7 | -0.280 | Monocrystalline |
| 7 | [ZEUS 2.1-635](https://comparepv.com/panel/heckert-solar-zeus-2-1-635) | 635 | 23.5 | -0.280 | Monocrystalline |
| 8 | [ZEUS 2.1 635W](https://comparepv.com/panel/heckert-solar-zeus-2-1-635w) | 635 | 23.5 | -0.280 | Monocrystalline |
| 9 | [ZEUS 3.0+ 108 490WP](https://comparepv.com/panel/heckert-solar-zeus-3-0-108-490wp) | 490 | 24.0 | -0.260 | Monocrystalline |
| 10 | [ZEUS 3.0+ 108 490WP PERFORMANCE](https://comparepv.com/panel/heckert-solar-zeus-3-0-108-490wp-performance) | 490 | 24.0 | -0.260 | Monocrystalline |


## Summary

GCL is a large Chinese energy group headquartered in Suzhou that entered the solar industry in the mid-2000s, building its business on polysilicon and cell manufacturing, with GCL-Poly Energy listed in Hong Kong since 2007 and GCL System Integration listed in Shenzhen since 2015. The group runs module manufacturing capacity in the tens of gigawatts per year and has been pushing aggressively into perovskite and tandem cell technology, commissioning what it describes as the world's first gigawatt-scale tandem module production line in Kunshan in 2025. Heckert Solar, by contrast, is a much smaller German manufacturer based in Chemnitz with more than two decades of operation, producing exclusively at its own German facilities in Chemnitz and Langenwetzendorf and marketing itself heavily on domestic sourcing and manufacturing control. In terms of scale and institutional footprint, GCL is the far larger and more globally recognized player, while Heckert Solar's standing rests on its localized, tightly controlled production model.

GCL's portfolio spans TOPCon-based modules aimed at utility-scale ground-mount plants and commercial installations, with an increasing emphasis on high-bifaciality cells that suit large ground-mounted arrays. Heckert Solar is more narrowly focused on rooftop residential and commercial C&I applications, with its Zeus line using bifacial n-type TOPCon cells reaching efficiencies of up to 22.8 percent, backed by 15 to 20 year product warranties and certification tying the module's components to German origin, a point of appeal for buyers concerned with supply chain transparency and carbon footprint.

For buyers prioritizing lower per-watt cost at large scale, particularly for utility or commercial ground-mount projects, GCL is generally the more competitive option thanks to its manufacturing scale and fast technology rollout. Heckert Solar is the better fit where provenance, a shorter supply chain, and a European manufacturer matter more than achieving the lowest possible price per watt.

Written by claude-sonnet-5 from the figures above.


## Other comparisons

- [GCL vs A.B. Energy](https://comparepv.com/gcl-vs-a-b-energy)
- [AE Solar vs Heckert Solar](https://comparepv.com/ae-solar-vs-heckert-solar)
- [GCL vs AEET](https://comparepv.com/gcl-vs-aeet)
- [AIKO vs Heckert Solar](https://comparepv.com/aiko-vs-heckert-solar)
- [GCL vs AKCOME](https://comparepv.com/gcl-vs-akcome)
- [ARTsolar vs Heckert Solar](https://comparepv.com/artsolar-vs-heckert-solar)


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Source: https://comparepv.com/gcl-vs-heckert-solar

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