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

# Suntech vs Techwise Solar

Suntech has the broader catalog (255 vs 164 models). Suntech leads on peak efficiency at 24.80%.


## The two companies


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


## Catalog & Power


| Measure | Suntech | Techwise Solar | Margin |
| --- | --- | --- | --- |
| Panel Models | 255 | 164 | +91 |
| Max Power | 735 W | 720 W | +15 W |
| Avg Power | 505 W | 530 W | +25 W |


## Efficiency


| Measure | Suntech | Techwise Solar | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 24.80% | 23.80% | +1.00 pp |
| Avg Efficiency | 21.76% | 21.88% | +0.13 pp |


## Reliability & Warranty


| Measure | Suntech | Techwise Solar | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.316%/°C | -0.317%/°C | +0.001 |
| Bifacial Share | 114 (45%) | 81 (49%) | +5 pp |
| Avg Warranty | 28.4 yrs | 27.3 yrs | +1.0 yr |


## Efficiency distribution

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


| Efficiency band | Suntech | Techwise Solar |
| --- | --- | --- |
| \<20% | 11 (4.3%) | 2 (1.2%) |
| 20-21% | 61 (23.9%) | 25 (15.2%) |
| 21-22% | 64 (25.1%) | 47 (28.7%) |
| 22-23% | 70 (27.5%) | 74 (45.1%) |
| 23%+ | 49 (19.2%) | 15 (9.1%) |
| Unknown | 0 | 1 (0.6%) |


## Power distribution

Techwise Solar offers more 600W+ panels (27% of lineup)


| Power band | Suntech | Techwise Solar |
| --- | --- | --- |
| \<400W | 32 (12.5%) | 4 (2.4%) |
| 400-499W | 104 (40.8%) | 60 (36.6%) |
| 500-599W | 69 (27.1%) | 55 (33.5%) |
| 600-699W | 42 (16.5%) | 40 (24.4%) |
| 700W+ | 8 (3.1%) | 5 (3.0%) |


## Cell technology

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

Dominant cell tech: **TOPCon** (70%)


| Technology | Suntech | Techwise Solar |
| --- | --- | --- |
| TOPCon | 180 (70.6%) | 114 (69.5%) |
| Unknown | 65 (25.5%) | 4 (2.4%) |
| PERC | 5 (2.0%) | 46 (28.0%) |
| N-type | 5 (2.0%) | 0 |


## 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 |


## Top panels, Techwise Solar


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [TW-720HT-01-720W](https://comparepv.com/panel/techwise-solar-tw-720ht-01-720w) | 720 | 22.5 | -0.300 | Monocrystalline |
| 2 | [TW-720HT-01-715W](https://comparepv.com/panel/techwise-solar-tw-720ht-01-715w) | 715 | 22.4 | -0.300 | Monocrystalline |
| 3 | [TW-720HT-01-710W](https://comparepv.com/panel/techwise-solar-tw-720ht-01-710w) | 710 | 22.2 | -0.300 | Monocrystalline |
| 4 | [TW-720HT-01-705W](https://comparepv.com/panel/techwise-solar-tw-720ht-01-705w) | 705 | 22.1 | -0.300 | Monocrystalline |
| 5 | [TW-720HT-01-700W](https://comparepv.com/panel/techwise-solar-tw-720ht-01-700w) | 700 | 21.9 | -0.300 | Monocrystalline |
| 6 | [TW-670HT](https://comparepv.com/panel/techwise-solar-tw-670ht) | 670 | 21.6 | -0.340 | Monocrystalline |
| 7 | [TW-665HT](https://comparepv.com/panel/techwise-solar-tw-665ht) | 665 | 21.4 | -0.340 | Monocrystalline |
| 8 | [TW-660HT](https://comparepv.com/panel/techwise-solar-tw-660ht) | 660 | 21.2 | -0.340 | Monocrystalline |
| 9 | [TW-655HT](https://comparepv.com/panel/techwise-solar-tw-655ht) | 655 | 21.1 | -0.340 | Monocrystalline |
| 10 | [TW-650HT](https://comparepv.com/panel/techwise-solar-tw-650ht) | 650 | 20.9 | -0.340 | Monocrystalline |


## Summary

Suntech is a Chinese solar panel manufacturer founded in 2001 by Dr. Zhengrong Shi in Wuxi, Jiangsu Province. Once the world's largest PV module supplier, the company underwent a high-profile insolvency in 2013 before being restructured under Shunfeng International Clean Energy in 2014; in April 2025, Xiamen C&D Group assumed the chairmanship. Suntech holds BloombergNEF Tier 1 bankability status and has reported annual shipments of around 10 GW, placing it among the mid-to-upper tier of global module manufacturers by volume. Techwise Solar Technology Co., Ltd., also headquartered in Jiangsu Province (Nantong, Rudong County), is a considerably smaller operation with approximately 1 GW of annual production capacity. The company supplies ODM and OEM services to larger brands but has not been confirmed as a Tier 1 bankable manufacturer under its own brand name. On institutional footprint and market recognition, Suntech holds the stronger position by a wide margin.

Suntech's lineup spans residential rooftop through large commercial and industrial applications, with module outputs ranging from around 395 W to over 700 W. The company reports average module efficiencies of approximately 22%, with top-performing models exceeding 23%, and performance warranties averaging around 29 years across the range - competitive by industry standards. Techwise Solar's catalog centers on monocrystalline modules built on TOPCon cell technology, available in bifacial double-glass configurations using half-cut cell layouts and 16-busbar interconnection designs. The company supports 182 mm and 210 mm cell formats and positions its Sun-Pursuit Pro series for installations where high energy yield under partial shading or demanding conditions is a priority. Both manufacturers address residential and commercial ground-mount segments, though Suntech's scale and track record make it the more realistic candidate for utility-scale or project-financed deployments.

For most international buyers - particularly those sourcing modules for bankable project-finance structures or utility-scale ground-mount farms - Suntech is the more defensible default. Its Tier 1 status provides lenders with the confidence required to close project finance deals, and its long, if turbulent, operational history gives engineering and procurement teams established reference data. Techwise Solar is a credible alternative for buyers comfortable with a smaller, less-recognized brand, especially for self-funded residential or light-commercial installations where lender approval is not a hard requirement. The two are not interchangeable at utility scale, but for straightforward owner-funded rooftop projects the gap narrows, and Techwise Solar's TOPCon-based products may offer competitive watt-for-watt value.

Written by claude-sonnet from the figures above.


## Other comparisons

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


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

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