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

# Heckert Solar vs Resun Solar

Resun Solar has the broader catalog (236 vs 155 models). Heckert Solar leads on peak efficiency at 24.30%. Heckert Solar leans bifacial (42% of lineup).


## The two companies


| Attribute | Heckert Solar | Resun Solar |
| --- | --- | --- |
| Country | Germany | China |
| Headquarters | Chemnitz | Suzhou |
| Founded | 1992 | 2007 |
| Employees | 201 |  |
| Annual capacity | 0.8 GW/year | 1 GW/year |
| Tier 1 |  |  |
| Listed |  |  |
| Website | [https://www.heckertsolar.com/en/](https://www.heckertsolar.com/en/) | [http://www.resunsolar.com](http://www.resunsolar.com) |

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...

Resun Solar Energy Co., Ltd. specializes in developing and manufacturing high-quality, cost-effective photovoltaic solar modules. With factories accredited by ISO9001 & 14001, their panels are certified by TUV, IEC61215, IEC61730, and other international quality systems. The company's sales network spans over 80...


## Catalog & Power


| Measure | Heckert Solar | Resun Solar | Margin |
| --- | --- | --- | --- |
| Panel Models | 155 | 236 | +81 |
| Max Power | 715 W | 735 W | +20 W |
| Avg Power | 420 W | 510 W | +90 W |


## Efficiency


| Measure | Heckert Solar | Resun Solar | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 24.30% | 23.66% | +0.64 pp |
| Avg Efficiency | 21.43% | 21.52% | +0.09 pp |


## Reliability & Warranty


| Measure | Heckert Solar | Resun Solar | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.318%/°C | -0.318%/°C | +0.000 |
| Bifacial Share | 65 (42%) | 73 (31%) | +11 pp |
| Avg Warranty | 27.1 yrs | 30.0 yrs | +2.9 yr |


## Efficiency distribution

Heckert Solar skews to higher efficiency: 17% of lineup is 23%+


| Efficiency band | Heckert Solar | Resun Solar |
| --- | --- | --- |
| \<20% | 27 (17.4%) | 28 (11.9%) |
| 20-21% | 54 (34.8%) | 30 (12.7%) |
| 21-22% | 3 (1.9%) | 60 (25.4%) |
| 22-23% | 44 (28.4%) | 101 (42.8%) |
| 23%+ | 27 (17.4%) | 17 (7.2%) |


## Power distribution

Resun Solar offers more 600W+ panels (29% of lineup)


| Power band | Heckert Solar | Resun Solar |
| --- | --- | --- |
| \<400W | 64 (41.3%) | 33 (14.0%) |
| 400-499W | 83 (53.5%) | 80 (33.9%) |
| 600-699W | 4 (2.6%) | 54 (22.9%) |
| 700W+ | 4 (2.6%) | 14 (5.9%) |
| 500-599W | 0 | 55 (23.3%) |


## Cell technology

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

Dominant cell tech: **TOPCon** (66%)


| Technology | Heckert Solar | Resun Solar |
| --- | --- | --- |
| TOPCon | 52 (33.5%) | 155 (65.7%) |
| PERC | 46 (29.7%) | 0 |
| Unknown | 35 (22.6%) | 81 (34.3%) |
| Back Contact | 20 (12.9%) | 0 |
| N-type | 2 (1.3%) | 0 |


## 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 |


## Top panels, Resun Solar


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [RS9H-M TOPCON-735](https://comparepv.com/panel/resun-solar-rs9h-m-topcon-735) | 735 | 23.7 | -0.300 | Monocrystalline |
| 2 | [RS9H-M TOPCON-730](https://comparepv.com/panel/resun-solar-rs9h-m-topcon-730) | 730 | 23.5 | -0.300 | Monocrystalline |
| 3 | [RS9H-M TOPCON-725](https://comparepv.com/panel/resun-solar-rs9h-m-topcon-725) | 725 | 23.3 | -0.300 | Monocrystalline |
| 4 | [RS9H-M TOPCON-720](https://comparepv.com/panel/resun-solar-rs9h-m-topcon-720) | 720 | 23.2 | -0.300 | Monocrystalline |
| 5 | [RS9H-M-720](https://comparepv.com/panel/resun-solar-rs9h-m-720) | 720 | 23.2 | -0.300 | Monocrystalline |
| 6 | [RS9H-M-DG-720](https://comparepv.com/panel/resun-solar-rs9h-m-dg-720) | 720 | 23.2 | -0.300 | Monocrystalline |
| 7 | [RS9H-M-715](https://comparepv.com/panel/resun-solar-rs9h-m-715) | 715 | 23.0 | -0.300 | Monocrystalline |
| 8 | [RS9H-M-DG-715](https://comparepv.com/panel/resun-solar-rs9h-m-dg-715) | 715 | 23.0 | -0.300 | Monocrystalline |
| 9 | [RS9H-M-710](https://comparepv.com/panel/resun-solar-rs9h-m-710) | 710 | 22.9 | -0.300 | Monocrystalline |
| 10 | [RS9H-M-DG-710](https://comparepv.com/panel/resun-solar-rs9h-m-dg-710) | 710 | 22.9 | -0.300 | Monocrystalline |


## Summary

Heckert Solar is a German module manufacturer headquartered in Chemnitz, producing panels exclusively in Germany since the early 2000s, with a plant in Langenwetzendorf running at roughly 400 MW annually that is slated for expansion into the multi-gigawatt range as part of a broader domestic manufacturing consortium. Resun Solar, by contrast, is a Chinese manufacturer founded in 2005, operating two production bases in Jiangsu province with annual capacity around 3 GW, and holding IEC, TUV and VDE certifications along with Chubb insurance backing on its output. On raw manufacturing scale Resun has the stronger footprint, while Heckert Solar's advantage lies in being a fully domestic European producer, which can matter for buyers with local-content or supply-chain requirements.

Heckert Solar's lineup centers on n-type TOPCon cells, including its bifacial glass-glass Zeus series rated for mechanical loads up to 8,100 Pa, aimed at residential rooftops, commercial roof arrays, and ground-mount or agri-PV installations. Resun Solar has likewise moved its portfolio toward TOPCon technology, offering large-format 210mm modules reaching up to 720W for utility-scale and ground-mount projects, alongside a residential-oriented range in the 380-460W bracket. Both brands advertise performance warranties extending up to 30 years, putting them on comparable footing in terms of long-term guarantees.

For a typical international buyer, Heckert Solar suits projects that prioritize European manufacturing provenance and premium brand positioning, such as residential or commercial installations in the EU. Resun Solar is generally the more cost-competitive option for large ground-mount or utility-scale deployments where production scale and unit economics dominate the decision. Since both rely on comparable TOPCon cell technology, the choice between them often comes down to sourcing logistics and budget rather than a meaningful gap in underlying panel technology.

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


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

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