Suntech Solar Panels in Australia

Suntech is the largest manufacturer of solar photovoltaic (PV) modules in the world. Suntech’s 350-person strong research and development (R&D) team spans three continents. Although Suntech’s head office and manufacturing operations are located primarily in China, CEO Dr Zhongrong Shi is a PhD graduate of the University of New South Wales’s (UNSW) Photovoltaic Centre of Excellence, and the company’s Australian origins and ongoing Australia-based Research & Development are clearly a point of pride for Suntech.

Stepped warranties, Good performance in low-light conditions,
Positive manufacturer’s tolerance, and Current sorting

Suntech offers a range of solar panels, from less efficient standard silicon panels to industry-leading high-efficiency panels using the company’s newly introduced Pluto technology (also discussed below). No matter which of these technologies is used or the model under consideration, Suntech panels are characterised by a number of features that make them stand out from others in this increasingly competitive field. These characteristics are detailed below.

Standard Suntech Silicon Cells

High module conversion efficiency. Athough module efficiency varies slightly from model to model, Suntech standard poly- and monocrystalline silicon modules routinely achieve 14.9% efficiency, 2 to 5% more than many other panels on the market.

-Positive power tolerance. Suntech ensures its panels’ output reliability by guaranteeing that its solar panels will perform at their rated output or greater at the time of purchase: 0 to +5%. This is in contrast to an industry average of +/-3%.


Suntech panels positive power tolerance comparison
Suntech’s solar panels are guaranteed to perform at their rated output or higher at the time of purchase. Source:

-Better low-light performance. All solar panel arrays will be affected at some point by overcast skies and other sub-optimal lighting conditions. Suntech panels’ efficiency is up to 2.5% better in low-light conditions, thanks to their ‘edge-isolation’ technology, which essentially means shorter ‘fingers’ on the cells and therefore less wasted sunlight.

-TruPower process. All silicon solar cells are susceptible to material and performance degradation over time due to a phenomenon called ‘light-induced degradation’ (LID). Suntech’s TruPower process takes LID into account in determining nominal system wattage from time of production. This means higher output than most brands over the course of a Suntech cell’s lifetime.

-Stepped Warranty means more assurance over a panel’s lifetime. Most solar module manufacturers offer a two-step solar product warranty for module components and a 25 year manufacturer’s power output warranty for the cells themselves. Suntech warrantees are broken into four steps for more certainty over discreet periods: 10 (as of 15 July 2011), 12, 18, and 25 years, resulting in estimated comparative efficiencies of anywhere from 6% to 28% over the course of a panel’s lifetime. This means that the owner is able to more accurately estimate the returns from their solar system over the course of its lifetime.

Suntech panels vs competitors warranty
Suntech warranties vs Competitor warranties

-Current sorting processes. Suntech modules of the same rated capacity are sorted and packaged by current, so that current mistmach losses are reduced by up to 2%.

In focus: Suntech Ad+–190W for residences

The Ad+ is one of four residential solar panels available in Australia. At 14.9% module efficiency, in combination with the other benefits as mentioned above, it offers market-leading value for money.

190s 24/Ad+ Suntech Solar Panel
190s 24/Ad+ Suntech Solar Panel

-Product Specifications/Electrical Characteristics-

Suntech 190s Ad+ Solar panel Specifications
Standard test conditions are lrradiance 1000 W/m2, module temperature 25 °C, AM=1.5;

-Component standards met/awards-

PV Cycle–Suntech participates in PV Cycle’s voluntary take-back PV recycling program

CE mark–Panel is compliant with European Union regulations

-Clean Energy Council–Suntech panels can be found on the CEC approved solar panel list


-Other products by Suntech-

Sydney Town Hall solar panel array uses Suntech Pluto technology
Suntech Pluto technology is used in Sydney Town Hall’s 48kW solar power array

Suntech offers a wide range of reliable silicon solar module products, with capacities between 180W and 280W and including polycrystalline and monocrystalline modules, allowing a great degree of solar system design flexibility.

Suntech’s most recent technological development is its Pluto technology, which uses super-fine ‘fingers’ (the conductive metal strips on the silicon cells) to effectively increase the cell area that can capture usable sunlight. Although not yet commercially available in Australia except for larger, iconic solar installations such as those on Sydney Town Hall and the Sydney Theatre Company, Pluto panels are becoming increasingly widespread in the EU, where limited roof-space means higher demand for high-efficiency panels.

Standard silicon cells vs cells using Pluto technology
Standard silicon cells (r) vs cells using Pluto technology (l). Note the fineness of the conductive ‘fingers’ in the Pluto cell.

About Suntech

-Company Headquarters-

Wuxi, China

-Factory locations-

China, USA

-Production capacity-

2.4GW capacity for modules, 1.2GW of in-house wafering and cell capacity by the end of 2011.


“Suntech has sold over 15,000,000 panels to thousands of customers in more than 80 countries. Our customers come to trust us as the reliable partner of choice, and with our industry-leading 10 year product warranty they know that Suntech products can provide the safest and fastest return on their investment.” Suntech APMEA President James Hu.

Solar Choice is a solar installation comparison service: we don’t undertake our own solar array installations, but we do offer free independent solar quote comparisons of what’s on offer from trusted solar system installers nationally. Our installers may use components from different manufacturers, and if you’re new to solar power installations, you will probably want to know what distinguishes one company’s panelsinvertersbatteries, and other system parts from those of their competitors. This article is one of a series written to help you make an informed decision about purchasing your solar power system.

Written by James Martin

James Martin II


  1. I currently have a grid connected system installed by sunsavers in 2010. I had 16 panels installed but the system is capable of another 4 panels. Am I able to buy 4 more panels? if so, how much are they?

    1. Hi Tania,

      It’s unusual for anyone to increase the size of their system after it has been installed, mainly due to technical complications. Whether or not you can add more panels depends first on whether your inverter can handle it – you’ll have to check the specifications.

      Solar Choice cannot sell you panels as we are a brokerage and comparison service – you should endeavour to reach out to an installation company directly if you’re interested in expanding your system.

      Best of luck!

  2. The more I read the more I’m confused. I have a choice of two panels Suntech Pluto 235 wdm or Renesola 156 series 250w. So which one is better? And for what reasons?

    1. Hi Natasha,

      They’re both relatively well-known names in solar panels, although Suntech is a bigger company. Feel free to get in touch with one of our brokers by calling 1300 78 72 73 for some free advice, or get a comparison of solar quotes for your area by filling out the form to the right of this page.

  3. We live in a double storey house on the golf course and have the occasional golf ball over the roof of the house into the front garden I have had a quote using Suntech 190watt Mono panels, but unfortunately they wish to install them on the roof facing easterly which is on the side of the golf course. Can these panels withstand the impact of a golf ball? Alternatively we could have them on a westerly roof with rather a large pitch. PS to someone who knows nothing about solar this blog/ website has been very informative

    1. Hi Janet,

      To address the points in your enquiry:

      -Solar panels are manufactured to meet certain hail impact resistance standards–IEC 61215 (which Suntech’s 190W panels have) certifies the panels as being resistant to certain degrees of hail impact. Whether golf balls make a comparable impact, I can’t say for sure, but solar panels are designed to be fairly sturdy and last more than 1/4 of a century, so it could be all right. How often are does your roof get hit by golf balls now?

      -Your installer may have had good reason to recommend installing the panels on your east roof (shading on the west roof, etc), but all other things being equal, we generally recommend installing on the west roof if there is no north-facing roof to install on (read more). The reasoning for this is mainly that electricity is more expensive in the afternoon/evening, and it makes more sense to consume more of your solar electricity during these periods, rather than purchase higher-priced power from the electricity grid. This would also eliminate the problem of the golf balls coming from the east. The only consideration is that if you live in a state that guarantees its Solar Feed-in Tariff for a long time (really only Queensland at this point in time), then you don’t have to worry about this issue as much. Where are you located?

      -I’m happy you find our website helpful. We’ve worked hard to make it what it is!

  4. SunPower is much more efficient.
    With the E19 Panel, they have 19% efficiency.

    SunPower is from US.

    1. Hi Max,

      Although Suntech panels are not the most efficient commercially-produced panels in the world, some modules, in particular modules that use their Pluto technology, are among the most efficient.

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