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

# Heckert Solar vs Longi Solar

Longi Solar has the broader catalog (255 vs 155 models). Longi Solar leads on peak efficiency at 25.00%.


## The two companies


| Attribute | Heckert Solar | Longi Solar |
| --- | --- | --- |
| Country | Germany | China |
| Headquarters | Chemnitz | Xi'an, Shaanxi |
| Founded | 1992 | 2000 |
| Employees | 201 | 37,853 |
| Annual capacity | 0.8 GW/year | 85-90 GW/year |
| Tier 1 |  | yes |
| Listed |  | Shanghai Stock Exchange: 601012 |
| Website | [https://www.heckertsolar.com/en/](https://www.heckertsolar.com/en/) | [https://www.longi.com](https://www.longi.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...

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...


## Catalog & Power


| Measure | Heckert Solar | Longi Solar | Margin |
| --- | --- | --- | --- |
| Panel Models | 155 | 255 | +100 |
| Max Power | 715 W | 670 W | +45 W |
| Avg Power | 420 W | 544 W | +124 W |


## Efficiency


| Measure | Heckert Solar | Longi Solar | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 24.30% | 25.00% | +0.70 pp |
| Avg Efficiency | 21.43% | 22.65% | +1.22 pp |


## Reliability & Warranty


| Measure | Heckert Solar | Longi Solar | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.318%/°C | -0.291%/°C | +0.027 |
| Bifacial Share | 65 (42%) | 101 (40%) | +2 pp |
| Avg Warranty | 27.1 yrs | 27.8 yrs | +0.7 yr |


## Efficiency distribution

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


| Efficiency band | Heckert Solar | Longi Solar |
| --- | --- | --- |
| \<20% | 27 (17.4%) | 3 (1.2%) |
| 20-21% | 54 (34.8%) | 26 (10.2%) |
| 21-22% | 3 (1.9%) | 47 (18.4%) |
| 22-23% | 44 (28.4%) | 70 (27.5%) |
| 23%+ | 27 (17.4%) | 109 (42.7%) |


## Power distribution

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


| Power band | Heckert Solar | Longi Solar |
| --- | --- | --- |
| \<400W | 64 (41.3%) | 8 (3.1%) |
| 400-499W | 83 (53.5%) | 81 (31.8%) |
| 600-699W | 4 (2.6%) | 96 (37.6%) |
| 700W+ | 4 (2.6%) | 0 |
| 500-599W | 0 | 70 (27.5%) |


## Cell technology

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

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


| Technology | Heckert Solar | Longi Solar |
| --- | --- | --- |
| TOPCon | 52 (33.5%) | 0 |
| PERC | 46 (29.7%) | 51 (20.0%) |
| Unknown | 35 (22.6%) | 55 (21.6%) |
| Back Contact | 20 (12.9%) | 42 (16.5%) |
| N-type | 2 (1.3%) | 107 (42.0%) |


## 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, 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 |


## Summary

Heckert Solar is a German manufacturer founded in 2003 and headquartered in Chemnitz, Saxony. It operates two production facilities in Germany with a combined annual output capacity of approximately 800 MWp. Heckert does not appear on the BloombergNEF global Tier 1 list, but it has held the Intersolar Top Brand PV seal since 2015, a credential that carries meaningful weight in the European installer community. LONGi Solar, founded in Xi'an, China in 2000, operates at an entirely different scale - its annual module production capacity is in the range of 120 GW, placing it among the top two manufacturers globally. LONGi has maintained consecutive BloombergNEF Tier 1 status and, as of Q1 2026, holds a double Tier 1 rating covering both PV modules and energy storage. On institutional footprint and bankability alone, LONGi holds a decisive advantage.

Heckert Solar's product range spans three series. The NeMo line, based on Mono-PERC cells, targets standard residential rooftop installations. The Apollon line uses n-type TOPCon cells with a bifaciality factor of up to 85% and extends the brand's reach into residential and light commercial projects. The flagship Zeus series features glass-glass construction with n-type back-contact cells achieving up to 23.5% efficiency; larger project-scale variants reach 720 Wp and are suitable for ground-mounted arrays. LONGi centers its catalog on its proprietary HPBC 2.0 technology. The Hi-MO 9, confirmed at 24.8% module efficiency and up to 670 W output, is engineered for utility-scale and large commercial ground-mount projects, and independent European studies found it outperforms mainstream TOPCon alternatives in real-world energy yield by roughly 1 to 4 percent. The residential-focused Hi-MO X10 EcoLife series delivers up to 500 W in a full-black format and received a TUV Rheinland A+ anti-shading rating in 2025.

For most large commercial and utility buyers, LONGi is the default choice given its bankability, technology lead, and global service coverage. Heckert Solar fills a well-defined premium niche for buyers who require verified European manufacturing - particularly relevant for public subsidy programs with local-content requirements, green procurement frameworks, or investors for whom supply-chain transparency outweighs pure cost efficiency. The two brands are not interchangeable and serve genuinely distinct buyer profiles.

Written by claude-sonnet from the figures above.


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

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