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

# JS Solar vs Suntech

Suntech has the broader catalog (255 vs 137 models). Suntech leads on peak efficiency at 24.80%. Suntech leans bifacial (45% of lineup).


## The two companies


| Attribute | JS Solar | Suntech |
| --- | --- | --- |
| Country | China | China |
| Headquarters | Jinhua | Wuxi |
| Founded | 2011 | 2001 |
| Employees |  |  |
| Annual capacity |  |  |
| Tier 1 | no | yes |
| Listed |  |  |
| Website | [https://www.jssolar.com](https://www.jssolar.com) | [https://www.suntech-power.com](https://www.suntech-power.com) |


## Catalog & Power


| Measure | JS Solar | Suntech | Margin |
| --- | --- | --- | --- |
| Panel Models | 137 | 255 | +118 |
| Max Power | 670 W | 735 W | +65 W |
| Avg Power | 430 W | 505 W | +75 W |


## Efficiency


| Measure | JS Solar | Suntech | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 22.45% | 24.80% | +2.35 pp |
| Avg Efficiency | 20.03% | 21.76% | +1.72 pp |


## Reliability & Warranty


| Measure | JS Solar | Suntech | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.335%/°C | -0.316%/°C | +0.019 |
| Bifacial Share | 12 (9%) | 114 (45%) | +36 pp |
| Avg Warranty | 25.1 yrs | 28.4 yrs | +3.2 yr |


## Efficiency distribution

Suntech skews to higher efficiency: 19% of lineup is 23%+


| Efficiency band | JS Solar | Suntech |
| --- | --- | --- |
| \<20% | 44 (32.1%) | 11 (4.3%) |
| 20-21% | 49 (35.8%) | 61 (23.9%) |
| 21-22% | 38 (27.7%) | 64 (25.1%) |
| 22-23% | 6 (4.4%) | 70 (27.5%) |
| 23%+ | 0 | 49 (19.2%) |


## Power distribution

Suntech offers more 600W+ panels (20% of lineup)


| Power band | JS Solar | Suntech |
| --- | --- | --- |
| \<400W | 54 (39.4%) | 32 (12.5%) |
| 400-499W | 44 (32.1%) | 104 (40.8%) |
| 500-599W | 32 (23.4%) | 69 (27.1%) |
| 600-699W | 7 (5.1%) | 42 (16.5%) |
| 700W+ | 0 | 8 (3.1%) |


## Cell technology

Dominant cell tech: **PERC** (39%)

Dominant cell tech: **TOPCon** (71%)


| Technology | JS Solar | Suntech |
| --- | --- | --- |
| Unknown | 76 (55.5%) | 65 (25.5%) |
| PERC | 53 (38.7%) | 5 (2.0%) |
| TOPCon | 8 (5.8%) | 180 (70.6%) |
| N-type | 0 | 5 (2.0%) |


## Top panels, JS Solar


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [JS210MHC132-670](https://comparepv.com/panel/js-solar-js210mhc132-670) | 670 | 21.6 | -0.340 | Monocrystalline |
| 2 | [JS210MHC132-665](https://comparepv.com/panel/js-solar-js210mhc132-665) | 665 | 21.4 | -0.340 | Monocrystalline |
| 3 | [JS210MHC132-660](https://comparepv.com/panel/js-solar-js210mhc132-660) | 660 | 21.2 | -0.340 | Monocrystalline |
| 4 | [JS210MHC132-655](https://comparepv.com/panel/js-solar-js210mhc132-655) | 655 | 21.1 | -0.340 | Monocrystalline |
| 5 | [JS210MHC132-650](https://comparepv.com/panel/js-solar-js210mhc132-650) | 650 | 20.9 | -0.340 | Monocrystalline |
| 6 | [JS210MHC120-605](https://comparepv.com/panel/js-solar-js210mhc120-605) | 605 | 21.4 | -0.340 | Monocrystalline |
| 7 | [JS210MHC120-600](https://comparepv.com/panel/js-solar-js210mhc120-600) | 600 | 21.2 | -0.340 | Monocrystalline |
| 8 | [JS210MHC120-595](https://comparepv.com/panel/js-solar-js210mhc120-595) | 595 | 21.0 | -0.340 | Monocrystalline |
| 9 | [JS210MHC120-590](https://comparepv.com/panel/js-solar-js210mhc120-590) | 590 | 20.8 | -0.340 | Monocrystalline |
| 10 | [JS210MHC120-585](https://comparepv.com/panel/js-solar-js210mhc120-585) | 585 | 20.7 | -0.340 | Monocrystalline |


## Top panels, Suntech


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [STP735S-D66-Nsh+](https://comparepv.com/panel/suntech-stp735s-d66-nsh) | 735 | 23.7 | -0.280 | Monocrystalline |
| 2 | [STP730S-D66-Nsh+](https://comparepv.com/panel/suntech-stp730s-d66-nsh) | 730 | 23.5 | -0.280 | Monocrystalline |
| 3 | [STP725S-D66-Nsh+](https://comparepv.com/panel/suntech-stp725s-d66-nsh) | 725 | 23.3 | -0.280 | Monocrystalline |
| 4 | [STP720S-D66-Nsh+](https://comparepv.com/panel/suntech-stp720s-d66-nsh) | 720 | 23.2 | -0.280 | Monocrystalline |
| 5 | [STP715S-D66-Nsh+](https://comparepv.com/panel/suntech-stp715s-d66-nsh) | 715 | 23.0 | -0.280 | Monocrystalline |
| 6 | [STP710S-D66-Nsh+](https://comparepv.com/panel/suntech-stp710s-d66-nsh) | 710 | 22.9 | -0.290 | Monocrystalline |
| 7 | [STP705S-D66-Nsh+](https://comparepv.com/panel/suntech-stp705s-d66-nsh) | 705 | 22.7 | -0.290 | Monocrystalline |
| 8 | [STP700S-D66-Nsh+](https://comparepv.com/panel/suntech-stp700s-d66-nsh) | 700 | 22.5 | -0.290 | Monocrystalline |
| 9 | [STP675S-D66/Wmh](https://comparepv.com/panel/suntech-stp675s-d66-wmh) | 675 | 21.7 | -0.340 | Monocrystalline |
| 10 | [STP670S-D66/Wmh](https://comparepv.com/panel/suntech-stp670s-d66-wmh) | 670 | 21.6 | -0.340 | Monocrystalline |


## Summary

JS Solar (Yixing JS Solar Co., Ltd.) is a Chinese manufacturer headquartered in Wuxi, operating since 2007, producing solar cells, PV modules, inverters and mounting systems, with an annual production capacity of roughly 600 MW - a scale that places it among smaller, regional players rather than the global Tier 1 leaders tracked by BloombergNEF. Suntech Power, by contrast, was founded back in 2001 in Wuxi by Dr. Zhengrong Shi and was for years one of the world's largest module makers, though its corporate history is turbulent: the original listed holding company, Suntech Power Holdings, is in liquidation, and the operating Wuxi Suntech business is now controlled by Shunfeng through an entity called Asia Pacific Resources. Suntech continues to promote itself as a BloombergNEF Tier 1 supplier, though some independent 2026 tier lists no longer include it, so that status should be treated as less certain than it once was. On institutional footprint and market history, Suntech clearly has the stronger position.

JS Solar's catalog leans toward standard mono- and polycrystalline modules aimed at residential and smaller commercial rooftops, exported to over 100 countries, but without a strong emphasis on cutting-edge cell technology. Suntech has shifted decisively to N-type TOPCon cells across its lineup, offering modules from roughly 395W up to 720W, with bifacial panels making up close to half its portfolio - a mix suited to both residential rooftops and larger ground-mount or utility-scale projects. Suntech quotes average module efficiency around 22 percent and performance warranties stretching up to 29 years on some lines.

For a typical international buyer prioritizing brand recognition, a broader product range and current-generation TOPCon technology, Suntech is the more conventional default choice, though its recent corporate restructuring and uncertain Tier 1 standing warrant a quick check with the local distributor. JS Solar can be a reasonable budget option for smaller installations where upfront cost matters more than cutting-edge technology or global brand reputation, but buyers should not expect it to match Suntech's scale or track record.

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


## Other comparisons

- [JS Solar vs A.B. Energy](https://comparepv.com/js-solar-vs-a-b-energy)
- [AE Solar vs Suntech](https://comparepv.com/ae-solar-vs-suntech)
- [JS Solar vs AEET](https://comparepv.com/js-solar-vs-aeet)
- [AIKO vs Suntech](https://comparepv.com/aiko-vs-suntech)
- [JS Solar vs AKCOME](https://comparepv.com/js-solar-vs-akcome)
- [ARTsolar vs Suntech](https://comparepv.com/artsolar-vs-suntech)


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Source: https://comparepv.com/js-solar-vs-suntech

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