Overview of TW Solar – Company History
Key Indicators
| TW Solar Panels | |
| Bloomberg Tier 1 Ranking | Yes |
| PV Evolution Labs Top Performer (2025) | Yes (7 out 7 tests) |
| Office location in Australia | No |
What is a Bloomberg Tier 1 Solar Panel?
What is PV Evolution Labs Top Performer?
Why is office location in Australia important?
How Much Do TW Solar Panels Cost?
- Full turnkey Solar System with TW Solar Panels
- Installation from a pre-vetted reputable installer from Solar Choice’s network
- The STC rebate and GST
| System Size | Average Fully Installed Cost |
| 5kW | $3,359 |
| 6.6KW | $4,260 |
| 10kW | $6,103 |
| 15KW | $9,585 |
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TW Solar Solar Panel Technologies
TNC1.0 Series (435–455 W)
The TNC1.0 TWMNH-48HC range represents the earlier generation of TW Solar’s half-cut cell panels. Using 48 half-cut monocrystalline PERC cells, these modules deliver 435 W – 455 W power output with a maximum efficiency around 21 %.
They use a glass-and-backsheet construction, which is lighter than glass-glass modules — typically weighing about 21 kg per panel. That makes them easier for installers to handle, especially on pitched tiled or Colorbond roofs. The panels include a positive power tolerance (0 ~ +3 %), meaning every module should perform at least at its rated output and can exceed it slightly under ideal conditions.
This series provides a solid, dependable option at a competitive price point. However, it uses P-type PERC cell technology, which is now considered standard rather than cutting-edge. Compared with newer N-type panels on the market, it will generally degrade a little faster over time and may deliver slightly lower efficiency in hot Australian conditions.
TNC2.0 Series (445–515 W)
The TNC2.0 series represents TW Solar’s current generation of products for Australia and includes both 48-cell and 54-cell variants with power ratings from 445 W up to 515 W. The key advancement in this range is the use of a dual-glass design, where both the front and rear surfaces are made of tempered glass rather than the traditional glass-and-polymer-backsheet combination.
This dual-glass approach enhances long-term durability and weather resistance, helping protect the solar cells from moisture ingress, ultraviolet degradation, and potential micro-cracking — all important considerations for Australia’s hot and often humid environment. Dual-glass panels are also more resistant to fire and mechanical stress, which can reduce long-term maintenance risks. However it should be noted that as the front glass sheet is thinner (2mm instead of 3.2mm), dual-glass panels are more susceptible to hail damage.
Like the earlier models, these modules use half-cut PERC cells, a manufacturing method that splits each full-sized solar cell into two smaller halves. This reduces resistive losses, allowing better performance under partial shading and slightly higher efficiency overall. Maximum efficiencies in the TNC2.0 range reach approximately 21.5 %, consistent with other mid-to-upper-tier panels in the market.
A typical TNC2.0 panel weighs around 22–23 kg and measures roughly 1.74 m × 1.13 m for the 48-cell version or 1.9 m × 1.1 m for the 54-cell version. These dimensions are similar to other 450 – 515 W panels on the market, making them compatible with most Australian racking and inverter systems.
The temperature coefficient of roughly -0.29 % / °C means the panel’s power output falls only slightly on hot days — a useful metric for Australian conditions, where panel surface temperatures can often exceed 60 °C.
TW Solar’s Warranty for Australian Customers
Product Warranty
All current TNC1.0 and TNC2.0 modules marketed in Australia carry a 15-year product warranty, covering defects in materials or workmanship that affect performance. Earlier single-glass panels may have a 12-year term. Deemed cosmetic issues such as surface marks or colour variation are excluded. Many residential solar panels in Australia now come with 25-year product warranty so the warranty length lags behind some of the leaders in the market.
Performance Warranty
TW Solar guarantees its dual-glass modules for 30 years, with less than 1 % degradation in the first year and no more than 0.4 % per year thereafter — ensuring at least 87.4 % of original output by year 30.
Older single-glass panels are covered for 25 years with a lower final output guarantee of about 85 %. These figures are competitive with other mid-to-upper-tier manufacturers.
Claims and Exclusions
If a panel underperforms or fails, Tongwei may repair, replace, or refund the affected module. Replacement freight is covered, but labour for removal or re-installation is not. Claims must be submitted within 30 days of discovery with proof of purchase and serial photos.
While the 15 / 30-year combination is reasonable on paper, support is handled via authorised distributors rather than a dedicated Australian office. Distributors prefer to deal directly with installation companies (not end-customers) so if your installer is no longer around warranty support may be tedious with TW solar.z
Pros and Cons of TW Solar Panels
| Pros | Cons |
|---|---|
| Large, Tier-1 manufacturer – TW Solar (Tongwei) is one of the world’s biggest vertically integrated solar companies, supplying wafers and cells to major brands such as Trina, LONGi and Jinko. | Limited Australian presence – Warranty support is handled via authorised distributors, with no local Tongwei office or service centre for direct consumer contact. |
| Strong 30-year performance warranty – Dual-glass panels are warranted to retain at least 87.4% of original output after 30 years, matching or exceeding many mid-tier competitors. | Shorter product warranty – 15-year product warranty is below the 25-year standard now offered by several leading panel brands. |
| Attractive pricing – Offers solid performance at a lower price point, appealing to cost-conscious residential and commercial buyers. | Limited long-term track record in Australian conditions – Fewer local field results and independent test data compared to established premium brands. |
TW Solar Panel Specifications (common solar panels)
| TWMNH-48HE470W | TWMNH-48HW475W | |
| Cell Number | 96 (6 x 16) | 96 |
| Cell Type | N- type TOPCon | N- type TOPCon |
| Power Output | 470 wp | 470 wp |
| Max Power Voltage | 30.8V | 31.05V |
| Panel Efficiency | 23.5% | 23.8% |
| Annual Power Degradation (year 2 to year 30) | 0.4% | 0.4% |
| Dimensions | 1762 × 1134 × 30 mm | 1762 × 1134 × 30 mm |
| Weight | 23.7kg | 23.7kg |
| Product Warranty | 25 years | 25 years |
| Operational Temperature Range | –40 °C to +85 °C | –40 °C to +85 °C |
| Manufactured in | China | China |
So, Should I Buy TW Solar Panels?
Example of TW Solar Project
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Reviews from Australians who have installed TW Solar Panels
Cannot comment as we are still waiting for the entire thing to be finalised 3 months later
Output has been low considering the optimum orientation and angle.
Review left 2 years after system installed
The solar system produces electricity like it's suppose to do. Haven't have any issues
Still new. Yet to see how it perform in the long run
Works well, decent warranty & reviews
All black panels with black railing.
Installation Photos
