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Detailed reviews and information of the best solar panels, inverters and batteries. Plus hybrid and off-grid solar system reviews and information articles on how solar and battery systems work.

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Reviews and information on the best Solar panels, inverters and batteries from SMA, Fronius, SunPower, SolaX, Q Cells, Trina, Jinko, Selectronic, Tesla Powerwall, ABB. Plus hybrid inverters, battery sizing, Lithium-ion and lead-acid batteries, off-grid and on-grid power systems.

Winaico Solar Panel Review

Jason Svarc

Winaico Solar Panel Review.jpg

Company background

Winaico is very unique in the solar world being a family run enterprise with a corporate philosophy focused on driving excellence, integrity and delivering quality solar solutions. Winaico is Taiwan’s largest solar module manufacturer and compared to the giant Chinese manufacturers which dominate much of the market Winaico is a much small player with a single manufacturing facility of 180MW annual capacity. Winaico emerged in 2007 from Win Win Precision Technology Co. who have been specialising in development of semiconductors for the solar industry since 2003.

Another unique characteristic of Winaico is they do not distribute solar panels through wholesalers but rather deliver directly to installers, solar technicians and project managers. This enables complete control over the handling of its products and builds a relationship with the end users and installers.

Winiaco prides itself on being a quality orientated company and its panels are subject to the highest quality standards with in-house lab testing of each module to German TÜV standards to ensure quality and long-term reliability, having recently been awarded a 2018 ‘Top PV brand’ seal in Germany.


Panel and PV Cell Technology

Winaico manufacture panels using both Poly and Monocrystalline cells and were an early adopter of the PERC (passivated emitter rear cell) technology which has now become a new industry standard for high efficiency cells. As the solar industry trends towards mono cells Winaico are focusing on higher efficiency monocrystalline panels with the release of the new 330W to 340W WSP-MX PERC series in 2019.

Winaico WSP_M6_cells close up.jpg

An unique cell feature developed my Winaico’s parent company Win Win technology back in early 2014 is the patented HeatCap™ technology which reduces the likelihood of cell micro cracks forming. Micro cracking in cells is a common problem in the industry due to either high wind loads or more often installer handling errors such as walking on panels during installation or cleaning. The HeatCap™ technology won several industry awards and proved to reduce micro cracking by around 20% in real world testing conducted by Industrial Technology Research Institute (ITRI). An added benefit of the Heatcap cells was the lower cell temperature and reduced likelihood of hotspot formation.

Read more about the HeatCap Technology here

High strength frame design

Winaico’s focus has always been on extremely tough and durable panel design and was one of the first manufacturers to successfully pass the TÜV-Rheinland's hail test which is known as the toughest impact hail test. The Winaico panels are built with some of strongest frames on the market with very deep extruded aluminium channel sections made from high strength 6000 series aluminium plus tough corner insert sections to provide greater torsional stiffness than the common mitre cut corner design used by most manufacturers. The new corner inserts also feature water drainage channels to help reduce dirt and dust build up which can cause partial shading and lead to hotspot formation over a prolonged time.

Winaico Frame corner insert.png

Winaico have undergone a range of extreme static and dynamic stress testing to verify their panels can withstand the most extreme weather conditions including typhoons and high snow loads found in North America and Europe.  Refer to attached report from Winaico


Range of Panels

The range of panels manufactured by Winaico is not as expansive as the larger manufacturers as they only focus on a few key technologies. Winaico now offer a range of high performance monocrystalline panels for residential and commercial applications utilising PERC monocrystalline cells.

WSP-PERC series

Winaico P6 solar panel PERC Multi s.jpg

Winaico are now phasing out the older P6 series panels which use multicrystalline cells to deliver 285 or 290W power output. These were the the most popular module for many years but now the company has shifted towards the higher efficency monocrystalline range of panels highlighted below.


WSP-MX series

The new WSP-MX series use high grade P-type monocrystalline PERC cells with 5 busbars to deliver up to 340W and operates at a peak efficiency of 19.4%. These are the most efficient panels ever released by Winaico and also incorporate the same high strength frames with insert corner sections and water/dust drainage features. Warranty is the above average 15 year product warranty and 25 year performance warranty.

WSP-MX black series

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The WSP-MX black series use high grade P-type monocrystalline PERC cells and 5 busbars to deliver up to 320W and operates at a peak efficiency of 18.3%. The all black panels also incorporate the same high strength frames with insert corner sections and water/dust drainage features. Warranty is the above average 15 year product warranty and 25 year performance warranty.


Performance and Reliability

Winaico is one of only a few manufacturer’s who automatically send the customer a copy of the EL flash test photographs for every panel purchased. The EL testing is a electro-luminescence test using a special X-ray camera which can detect any faults, micro-cracks, soldering errors or other potential issues during manufacture. Winaico can ensure quality by examining all cells and finished laminates for issues not visible to the naked eye thus ensuring 100% quality control.

Winaico EL Flash test.png

Winaico pride themselves on using a single state of the art production facility located in Taiwan using some of the highest level quality production controls with 100% optical, mechanical and electrical inspections throughout the manufacturing process. In addition Winaico also perform a reverse current test to identify any potential hot-spot cells which may form in the future.

Winaico solar cell assembly and testing.jpg

Series Resistance Testing

Winaico perform series resistance testing on all panels to ensure all panels have a very low internal resistance which in turn results in higher performance. The series resistance must be below 0.48 Ω which is a very low and also ensures there are no bad solder points or connections within the panels which could become problematic in the future.

Real world Testing

Winaico panels were installed at the desert Knowledge testing facility in central Australia in 2012 and are some of the highest performing panels with the lowest recorded degradation rate out of the 30+ modules under testing.

Winaico panels have some of the lowest rates of degradation - Real world test results from the DKASC desert knowledge testing facility in Alice Springs, Australia.

Being located in one of the hottest climates in the world is a testament to the quality and performance of Winaico panels in real world conditions.


Warranty and service

Winaico offer a longer 15 year manufacturer’s or product warranty which is 5 years higher than the 10 year industry average, along with the standard 25 performance warranty on all multicrystalline and monocrystalline panels.

The 25-year linear performance warranty is on par with most other manufacturers and ensures an output of at least 97 % of rated performance in the first year and an annual power degradation no more than 0.7 % in the following 24 years.

The service record is where Winaico stands out from the crowd being one of the most trusted manufacturers on the market. The service in the event of a fault is very fast and Winaico claim to have had only 16 recorded panel failures out of the 250,000 panels distributed around Australia over the last 7 years.

Two years free Insurance

Winaico also offer a unique insurance policy which is free for 2 years on all solar panels sold in Australia. This insures the complete solar installation from any kind of material damage, interruption of service and possible reduction in yield. This covers such events as fire, natural disasters, storms and hail, theft, operational errors and even damage from rodents.

See the full details here - Winaico insurance cover

Sustainability

Winaico is an advocate for Extended Producer Responsibility (EPR) and pushes to reduce energy and water usage throughout the manufacturing process. Environmental protection is also considering over the complete life-cycle of the solar panel and Winaico work with recycling partners such as take-e-way GmbH to help ensure the products are recycled in compliance with the WEEE directive (Waste of Electrical and Electronic Equipment).

The Winaico environmental management system is also certified to ISO 14001. Read the full WINAICO Corporate Social Responsibility report here.

Wrap Up - Summary

Winaico may not have the high production volumes and advertising force of the huge brands but they do have a very solid reputation for quality and reliability which is backed by proven real world performance. In the solar world with several big name brands having failures or quality control issues over the years consistent performance is the most important criteria and this is where Winaico seems to shine. Like all quality solar products Winaico do come at a higher price than much of the competition but paying slightly more is worth it for the longer term gains and piece of mind.