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

# Phono Solar vs Suntech

Suntech has the broader catalog (255 vs 174 models). Suntech leads on peak efficiency at 24.80%.


## The two companies


| Attribute | Phono Solar | Suntech |
| --- | --- | --- |
| Country | China | China |
| Headquarters | Nanjing | Wuxi |
| Founded | 2004 | 2001 |
| Employees | 13000+ |  |
| Annual capacity | 3-4 GW/year |  |
| Tier 1 | yes | yes |
| Listed |  |  |
| Website | [https://www.phonosolar.com](https://www.phonosolar.com) | [https://www.suntech-power.com](https://www.suntech-power.com) |

Phono Solar Technology Co., Ltd. specializes in the research, development, and manufacture of photovoltaic solar panels and is a global provider of solar products and services. The company is affiliated with SUMEC Group, a subsidiary of China National Machinery Industry Corporation (SINOMACH). Phono Solar has been...


## Catalog & Power


| Measure | Phono Solar | Suntech | Margin |
| --- | --- | --- | --- |
| Panel Models | 174 | 255 | +81 |
| Max Power | 730 W | 735 W | +5 W |
| Avg Power | 515 W | 505 W | +10 W |


## Efficiency


| Measure | Phono Solar | Suntech | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 23.50% | 24.80% | +1.30 pp |
| Avg Efficiency | 21.77% | 21.76% | +0.02 pp |


## Reliability & Warranty


| Measure | Phono Solar | Suntech | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.306%/°C | -0.316%/°C | +0.010 |
| Bifacial Share | 74 (43%) | 114 (45%) | +2 pp |
| Avg Warranty | 27.1 yrs | 28.4 yrs | +1.3 yr |


## Efficiency distribution

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


| Efficiency band | Phono Solar | Suntech |
| --- | --- | --- |
| \<20% | 3 (1.7%) | 11 (4.3%) |
| 20-21% | 37 (21.3%) | 61 (23.9%) |
| 21-22% | 53 (30.5%) | 64 (25.1%) |
| 22-23% | 62 (35.6%) | 70 (27.5%) |
| 23%+ | 19 (10.9%) | 49 (19.2%) |


## Power distribution

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


| Power band | Phono Solar | Suntech |
| --- | --- | --- |
| \<400W | 10 (5.7%) | 32 (12.5%) |
| 400-499W | 78 (44.8%) | 104 (40.8%) |
| 500-599W | 51 (29.3%) | 69 (27.1%) |
| 600-699W | 23 (13.2%) | 42 (16.5%) |
| 700W+ | 12 (6.9%) | 8 (3.1%) |


## Cell technology

Dominant cell tech: **PERC** (37%)

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


| Technology | Phono Solar | Suntech |
| --- | --- | --- |
| PERC | 65 (37.4%) | 5 (2.0%) |
| TOPCon | 53 (30.5%) | 180 (70.6%) |
| N-type | 50 (28.7%) | 5 (2.0%) |
| HJT | 5 (2.9%) | 0 |
| Back Contact | 1 (0.6%) | 0 |
| Unknown | 0 | 65 (25.5%) |


## Top panels, Phono Solar


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [PS730M13GFH-22/WSHW](https://comparepv.com/panel/phono-solar-co-ltd-phono-solar-technology-co-ltd-ps730m13gfh-22-wshw) | 730 | 23.5 | -0.240 | Monocrystalline |
| 2 | [NS-730MH-132](https://comparepv.com/panel/phono-solar-ns-730mh-132) | 730 | 23.5 | -0.290 | Monocrystalline |
| 3 | [PS725M13GFH-22/WSHW](https://comparepv.com/panel/phono-solar-co-ltd-phono-solar-technology-co-ltd-ps725m13gfh-22-wshw) | 725 | 23.3 | -0.240 | Monocrystalline |
| 4 | [PS720M13GFH-22/WSHW](https://comparepv.com/panel/phono-solar-co-ltd-phono-solar-technology-co-ltd-ps720m13gfh-22-wshw) | 720 | 23.2 | -0.240 | Monocrystalline |
| 5 | [NS-720MH-132](https://comparepv.com/panel/phono-solar-ns-720mh-132) | 720 | 23.2 | -0.290 | Monocrystalline |
| 6 | [PS715M13GFH-22/WSHW](https://comparepv.com/panel/phono-solar-co-ltd-phono-solar-technology-co-ltd-ps715m13gfh-22-wshw) | 715 | 23.0 | -0.240 | Monocrystalline |
| 7 | [PS710M13GFH-22/WNH](https://comparepv.com/panel/phono-solar-technology-co-ltd-ps710m13gfh-22-wnh) | 710 | 22.9 | -0.290 | Monocrystalline |
| 8 | [PS710M13GFH-22/WSHW](https://comparepv.com/panel/phono-solar-co-ltd-phono-solar-technology-co-ltd-ps710m13gfh-22-wshw) | 710 | 22.9 | -0.240 | Monocrystalline |
| 9 | [NS-710MH-132](https://comparepv.com/panel/phono-solar-ns-710mh-132) | 710 | 22.9 | -0.290 | Monocrystalline |
| 10 | [PS705M13GFH-22/WNH](https://comparepv.com/panel/phono-solar-technology-co-ltd-ps705m13gfh-22-wnh) | 705 | 22.7 | -0.290 | 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

Phono Solar is a Chinese manufacturer headquartered in Nanjing, established in 2008 under SUMEC Group, a subsidiary of Sinomach - a Fortune 500 Chinese state-owned enterprise. That institutional backing has kept Phono Solar on the BloombergNEF Tier 1 list continuously since 2014, the inaugural year of that ranking, with annual production capacity now standing at approximately 3 GW and cumulative shipments surpassing 20 GW. Suntech was founded in 2001 by Dr. Zhengrong Shi in Wuxi, Jiangsu, and at its peak ranked as the world's largest PV module manufacturer - before filing for bankruptcy in 2013 after defaulting on a US$541 million bond. Subsequently acquired by Shunfeng Photovoltaic and restructured, Suntech has rebuilt capacity to a scale reportedly exceeding 10 GW per year and continues to appear on BNEF Tier 1 lists; however, as recently as June 2025, its Wuxi subsidiary entered a fresh pre-restructuring process with creditor claims filed in Chinese courts, raising persistent questions about long-term financial stability. On institutional transparency and ownership continuity, Phono Solar holds a clear advantage.

Phono Solar's catalog centers on bifacial modules and has earned repeated PVEL Top Performer recognition for module reliability across multiple test cycles. Its panels are deployed across residential rooftop systems, commercial and industrial installations, and utility-scale ground-mount projects, with module efficiencies in the 20-22.6% range and warranties extending to 15 years on product and 30 years on performance for its bifacial lines. Suntech has transitioned its entire current portfolio to TOPCon cell technology, offering power output from 395 W to 720 W and peak efficiencies reaching up to 23.2% on its top models according to independent reviews. The wide wattage range makes Suntech nominally suitable for everything from small residential retrofits to large-scale utility projects, although a reported catalog of over 130 module variants can complicate procurement and long-term serviceability planning for integrators.

For a typical international buyer prioritizing supply-chain resilience and warranty credibility, Phono Solar is the more defensible default - its unbroken Tier 1 track record, state-enterprise parent, and demonstrated PVEL reliability results combine to reduce counterparty risk for project lenders and long-term asset owners. Suntech's higher peak efficiencies and large production base are genuine technical merits, but the recurring restructuring history introduces procurement risk that project financiers should weigh carefully before committing. In low-stakes, short-horizon projects the two brands may be practically interchangeable; where service continuity and guarantor stability matter, Phono Solar is the stronger choice.

Written by claude-sonnet from the figures above.


## Other comparisons

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


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

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