---
title: "AIKO vs CSUN - Brand Comparison | ComparePV"
description: "Compare AIKO vs CSUN solar panels: full portfolio, efficiency, cell technology breakdown, warranty terms and company background."
source: "https://comparepv.com/aiko-vs-csun"
---

# AIKO vs CSUN

AIKO has the broader catalog (144 vs 35 models). AIKO leads on peak efficiency at 25.20%. AIKO leans bifacial (24% of lineup).


## The two companies


| Attribute | AIKO | CSUN |
| --- | --- | --- |
| Country | China | China |
| Headquarters | Shanghai | Nanjing |
| Founded | 2009 | 2004 |
| Employees |  | 1000-5000 |
| Annual capacity |  | 2-3 GW/year |
| Tier 1 | yes | yes |
| Listed | SZSE: 600732 |  |
| Website | [https://www.aikosolar.com](https://www.aikosolar.com) | [https://www.csun-solar.com](https://www.csun-solar.com) |

China Sunergy (CSUN) is a Chinese manufacturer of solar cells and photovoltaic modules headquartered in Nanjing, Jiangsu. The company produces high-efficiency mono- and multicrystalline solar cells and modules from production facilities in China and, historically, Turkey. It was formerly listed on NASDAQ and was...


## Catalog & Power


| Measure | AIKO | CSUN | Margin |
| --- | --- | --- | --- |
| Panel Models | 144 | 35 | +109 |
| Max Power | 805 W | 670 W | +135 W |
| Avg Power | 581 W | 478 W | +104 W |


## Efficiency


| Measure | AIKO | CSUN | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 25.20% | 21.60% | +3.60 pp |
| Avg Efficiency | 23.65% | 20.15% | +3.50 pp |


## Reliability & Warranty


| Measure | AIKO | CSUN | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.271%/°C | -0.366%/°C | +0.095 |
| Bifacial Share | 35 (24%) | 0 (0%) | +24 pp |
| Avg Warranty | 29.5 yrs | 25.0 yrs | +4.5 yr |


## Efficiency distribution

AIKO skews to higher efficiency: 85% of lineup is 23%+


| Efficiency band | AIKO | CSUN |
| --- | --- | --- |
| \<20% | 3 (2.1%) | 11 (31.4%) |
| 20-21% | 3 (2.1%) | 13 (37.1%) |
| 21-22% | 3 (2.1%) | 11 (31.4%) |
| 22-23% | 12 (8.3%) | 0 |
| 23%+ | 123 (85.4%) | 0 |


## Power distribution

AIKO offers more 600W+ panels (60% of lineup)


| Power band | AIKO | CSUN |
| --- | --- | --- |
| \<400W | 2 (1.4%) | 15 (42.9%) |
| 400-499W | 50 (34.7%) | 5 (14.3%) |
| 500-599W | 5 (3.5%) | 8 (22.9%) |
| 600-699W | 78 (54.2%) | 7 (20.0%) |
| 700W+ | 9 (6.2%) | 0 |


## Cell technology

Dominant cell tech: **Back Contact** (83%)

Dominant cell tech: **PERC** (94%)


| Technology | AIKO | CSUN |
| --- | --- | --- |
| Back Contact | 119 (82.6%) | 0 |
| N-type | 17 (11.8%) | 0 |
| PERC | 7 (4.9%) | 33 (94.3%) |
| Flexible | 1 (0.7%) | 0 |
| TOPCon | 0 | 2 (5.7%) |


## Top panels, AIKO


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [AIKO-A805-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a805-grh78dw) | 805 | 25.1 | -0.260 | Monocrystalline |
| 2 | [AIKO-A800-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a800-grh78dw) | 800 | 24.9 | -0.260 | Monocrystalline |
| 3 | [AIKO-A795-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a795-grh78dw) | 795 | 24.8 | -0.260 | Monocrystalline |
| 4 | [AIKO-A790-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a790-grh78dw) | 790 | 24.6 | -0.260 | Monocrystalline |
| 5 | [AIKO-A785-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a785-grh78dw) | 785 | 24.4 | -0.260 | Monocrystalline |
| 6 | [AIKO-A780-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a780-grh78dw) | 780 | 24.3 | -0.260 | Monocrystalline |
| 7 | [AIKO-A775-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a775-grh78dw) | 775 | 24.1 | -0.260 | Monocrystalline |
| 8 | [AIKO-A770-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a770-grh78dw) | 770 | 24.0 | -0.260 | Monocrystalline |
| 9 | [AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 | 25.0 | -0.260 | Monocrystalline |
| 10 | [AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 | 24.9 | -0.260 | Monocrystalline |


## Top panels, CSUN


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [CSUN670-132M](https://comparepv.com/panel/csun-csun670-132m) | 670 | 21.6 | -0.350 | Monocrystalline |
| 2 | [CSUN665-132M](https://comparepv.com/panel/csun-csun665-132m) | 665 | 21.4 | -0.350 | Monocrystalline |
| 3 | [CSUN660-132M](https://comparepv.com/panel/csun-csun660-132m) | 660 | 21.2 | -0.350 | Monocrystalline |
| 4 | [CSUN655-132M](https://comparepv.com/panel/csun-csun655-132m) | 655 | 21.1 | -0.350 | Monocrystalline |
| 5 | [CSUN650-132M](https://comparepv.com/panel/csun-csun650-132m) | 650 | 20.9 | -0.350 | Monocrystalline |
| 6 | [CSUN645-132M](https://comparepv.com/panel/csun-csun645-132m) | 645 | 20.8 | -0.350 | Monocrystalline |
| 7 | [CSUN600-156M](https://comparepv.com/panel/csun-csun600-156m) | 600 | 21.4 | -0.360 | Monocrystalline |
| 8 | [CSUN595-156M](https://comparepv.com/panel/csun-csun595-156m) | 595 | 21.2 | -0.360 | Monocrystalline |
| 9 | [CSUN590-156M](https://comparepv.com/panel/csun-csun590-156m) | 590 | 21.1 | -0.360 | Monocrystalline |
| 10 | [CSUN585-156M](https://comparepv.com/panel/csun-csun585-156m) | 585 | 20.9 | -0.360 | Monocrystalline |


## Summary

CSUN is a Chinese solar manufacturer with roots dating back to 2004, originally established as China Sunergy, and it carries Tier 1 bankability status. Its manufacturing footprint is comparatively modest, with design capacity around 2.5 GW spread across facilities in China, the United States, Turkey, South Korea and Vietnam, though the company has cumulatively shipped more than 15 GW of modules over the past decade. AIKO, also China-based, is a newer but faster-growing player that achieved BloombergNEF Tier 1 status and has scaled rapidly, moving from roughly 20 GW of annual production capacity in early 2025 to about 35.5 GW by mid-2026, placing it among the larger global module makers. On institutional footprint and momentum, AIKO clearly has the stronger and more rapidly expanding position.

The two brands also diverge in product focus and technology. CSUN's lineup centers on conventional PERC and half-cut monocrystalline modules aimed at residential, commercial and utility-scale projects, with efficiencies in the 19-21% range and standard 12-year product and 25-year performance warranties, positioning it as a solid but conventional mid-tier supplier. AIKO has built its identity around proprietary All Back Contact (ABC) cell technology, an N-type architecture that removes front-side busbars to maximize light absorption; its modules, including the Infinite series, reach efficiencies of roughly 22.1% to 24.4% and are marketed for premium residential rooftops as well as high-efficiency commercial and industrial installations, with 2025 innovations like silver-free copper metallization aimed at improving durability and cost.

For a typical buyer in 2025, AIKO is generally the stronger default choice given its larger production scale, faster capacity growth, and access to higher-efficiency ABC technology, which suits space-constrained or premium installations. CSUN remains a reasonable, cost-oriented option for buyers prioritizing a longer-established Tier 1 supplier with conventional PERC panels, particularly where efficiency headroom matters less than price.

\---LINKS---

\- https://www.pv-magazine.com/2025/03/12/aiko-launches-500-w-ci-back-contact-solar-module-with-25-efficiency/ \| Aiko launches 500 W C&I back-contact module with 25% efficiency \| article

\- https://www.pv-tech.org/industry-updates/aiko-cracks-bc-code-with-two-step-innovation/ \| AIKO cracks BC code with two-step innovation \| article

\- https://www.solarquotes.com.au/panels/aiko-solar-review.html \| Aiko Solar Panels Review \| review

\- https://gosolarquotes.com.au/review/csun-solar-panels/ \| CSUN Solar Panels Review: Are they Worth it? Pros & Cons \| review

\- https://www.vicoexport.com/en/65510/tier-1-list-of-solar-panel-manufacturers-q1-2026/ \| Tier 1 List of Solar Panel Manufacturers Q1 2026 \| article

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


## Other comparisons

- [AIKO vs A.B. Energy](https://comparepv.com/aiko-vs-a-b-energy)
- [AE Solar vs CSUN](https://comparepv.com/ae-solar-vs-csun)
- [AIKO vs AEET](https://comparepv.com/aiko-vs-aeet)
- [AKCOME vs CSUN](https://comparepv.com/akcome-vs-csun)
- [AIKO vs ARTsolar](https://comparepv.com/aiko-vs-artsolar)
- [ASM vs CSUN](https://comparepv.com/asm-vs-csun)


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Source: https://comparepv.com/aiko-vs-csun

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