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

# CSUN vs Trina Solar

Trina Solar has the broader catalog (340 vs 35 models). Trina Solar leads on peak efficiency at 24.80%. Trina Solar leans bifacial (43% of lineup).


## The two companies


| Attribute | CSUN | Trina Solar |
| --- | --- | --- |
| Country | China | China |
| Headquarters | Nanjing | Changzhou |
| Founded | 2004 | 1997 |
| Employees | 1000-5000 |  |
| Annual capacity | 2-3 GW/year |  |
| Tier 1 | yes | yes |
| Listed |  |  |
| Website | [https://www.csun-solar.com](https://www.csun-solar.com) | [https://www.trinasolar.com](https://www.trinasolar.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 | CSUN | Trina Solar | Margin |
| --- | --- | --- | --- |
| Panel Models | 35 | 340 | +305 |
| Max Power | 670 W | 760 W | +90 W |
| Avg Power | 478 W | 520 W | +42 W |


## Efficiency


| Measure | CSUN | Trina Solar | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 21.60% | 24.80% | +3.20 pp |
| Avg Efficiency | 20.15% | 21.71% | +1.56 pp |


## Reliability & Warranty


| Measure | CSUN | Trina Solar | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.366%/°C | -0.302%/°C | +0.064 |
| Bifacial Share | 0 (0%) | 145 (43%) | +43 pp |
| Avg Warranty | 25.0 yrs | 28.2 yrs | +3.2 yr |


## Efficiency distribution

Trina Solar skews to higher efficiency: 22% of lineup is 23%+


| Efficiency band | CSUN | Trina Solar |
| --- | --- | --- |
| \<20% | 11 (31.4%) | 22 (6.5%) |
| 20-21% | 13 (37.1%) | 57 (16.8%) |
| 21-22% | 11 (31.4%) | 83 (24.4%) |
| 22-23% | 0 | 102 (30.0%) |
| 23%+ | 0 | 76 (22.4%) |


## Power distribution

Trina Solar offers more 600W+ panels (34% of lineup)


| Power band | CSUN | Trina Solar |
| --- | --- | --- |
| \<400W | 15 (42.9%) | 28 (8.2%) |
| 400-499W | 5 (14.3%) | 142 (41.8%) |
| 500-599W | 8 (22.9%) | 54 (15.9%) |
| 600-699W | 7 (20.0%) | 72 (21.2%) |
| 700W+ | 0 | 44 (12.9%) |


## Cell technology

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

Dominant cell tech: **TOPCon** (73%)


| Technology | CSUN | Trina Solar |
| --- | --- | --- |
| PERC | 33 (94.3%) | 75 (22.1%) |
| TOPCon | 2 (5.7%) | 248 (72.9%) |
| Unknown | 0 | 11 (3.2%) |
| N-type | 0 | 6 (1.8%) |


## 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 |


## Top panels, Trina Solar


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [TSM-NEG21C.20Q-760](https://comparepv.com/panel/trina-solar-tsm-neg21c-20q-760) | 760 | 24.5 | -0.260 | Monocrystalline |
| 2 | [TSM-NEG21C.20Q-755](https://comparepv.com/panel/trina-solar-tsm-neg21c-20q-755) | 755 | 24.3 | -0.260 | Monocrystalline |
| 3 | [TSM-NEG21C.20Q-750](https://comparepv.com/panel/trina-solar-tsm-neg21c-20q-750) | 750 | 24.1 | -0.260 | Monocrystalline |
| 4 | [TSM-NEG21C.20Q-745](https://comparepv.com/panel/trina-solar-tsm-neg21c-20q-745) | 745 | 24.0 | -0.260 | Monocrystalline |
| 5 | [TSM-NEG21C.20-740](https://comparepv.com/panel/trina-solar-co-ltd-tsm-neg21c-20-740) | 740 | 23.8 | -0.290 | Monocrystalline |
| 6 | [TSM-NEG21C.20 740](https://comparepv.com/panel/trina-solar-tsm-neg21c-20-740) | 740 | 23.8 | -0.290 | Monocrystalline |
| 7 | [TSM-NEG21C.20Q-740](https://comparepv.com/panel/trina-solar-tsm-neg21c-20q-740) | 740 | 23.8 | -0.260 | Monocrystalline |
| 8 | [TSM-NEG21C.20-735](https://comparepv.com/panel/trina-solar-co-ltd-tsm-neg21c-20-735) | 735 | 23.7 | -0.290 | Monocrystalline |
| 9 | [TSM-NEG21C.20 735](https://comparepv.com/panel/trina-solar-tsm-neg21c-20-735) | 735 | 23.7 | -0.290 | Monocrystalline |
| 10 | [TSM-NEG21C.20Q-735](https://comparepv.com/panel/trina-solar-tsm-neg21c-20q-735) | 735 | 23.7 | -0.260 | Monocrystalline |


## Summary

CSUN, formally China Sunergy, is a Chinese manufacturer headquartered in Nanjing, founded in 2004 and running its first cell production line since 2005. It listed on NASDAQ in 2007 but was delisted in 2016 after significant financial trouble, and one of its US-based affiliates filed for bankruptcy in 2021. The company operates a comparatively modest 2.5 GW of annual production capacity across seven factories in China, the US, Turkey, South Korea and Vietnam, and does not appear on BloombergNEF's Tier 1 list. Trina Solar, in business since 1997 and headquartered in Changzhou, is one of the industry's global leaders, having shipped over 205 GW of modules to date, employing roughly 30,000 people, and running about 100 GW of annual manufacturing capacity, putting it among the top three producers worldwide alongside Jinko Solar and LONGi. Trina has repeatedly earned Tier 1 status and an AAA bankability rating, giving it a substantially stronger institutional footprint than CSUN.

CSUN's catalog spans mono- and multicrystalline modules across full-cell, half-cell, bifacial and shingled series aimed at residential, commercial and larger ground-mount projects, though its market presence outside Asia is limited and it rarely appears in independent field tests from Western installers. Trina Solar's lineup is considerably broader, with the Vertex series serving utility-scale and ground-mount installations, TALLMAX targeting commercial and large-scale projects, and the Vertex S/S+ line built for residential rooftops, all built around n-type i-TOPCon technology with modules now exceeding 700W of output.

For a typical buyer, whether a residential customer or a developer sourcing for a commercial project, Trina Solar is the safer default choice given its confirmed bankability, mature TOPCon platform and global manufacturing scale. CSUN may still fit narrow, budget-driven applications, but its history of financial instability and lack of Tier 1 status warrant caution around long-term warranty support and project financing.

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


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- [AIKO vs Trina Solar](https://comparepv.com/aiko-vs-trina-solar)
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- [ARTsolar vs Trina Solar](https://comparepv.com/artsolar-vs-trina-solar)


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Source: https://comparepv.com/csun-vs-trina-solar

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