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Tongwei Brand review

TWMNH-48HD450

450 Wp TOPCon Bifacial 80%
ComparePV verdict

Strong in heat, no clear weak spot

Rank 8,336 of 14,005
Compare panels Datasheet PDF
Power (Wp)
450
Weak · bottom 9%
Efficiency (%)
22.50
Typical · median 22.52%
Density (Wp/m²)
225.2
Typical · median 225.2
Temp (%/°C)
-0.280
Strong · top 11%
Weight (kg)
20.9
Strong · 3.1 kg below median
Warranty (yrs)
30
Typical · median 30 yrs

Tongwei TWMNH series photovoltaic panels are based on advanced N-type TOPCon cells, which represents a significant technological leap compared to traditional P-type modules. The use of Super Multi-Busbar (SMBB) technology allows for more efficient light capturing and a significant reduction in the current flow path, which directly translates into lower internal power losses. For investors, an effective solution to the problem of degradation caused by light and high ambient temperatures is key - the TWMNH series is characterized by exceptional resistance to LID and LeTID degradation and a very favorable temperature coefficient. As a result, photovoltaic systems operate extremely efficiently even on hot summer days, generating more energy from the same roof or ground area. These modules are primarily dedicated to demanding commercial and industrial installations, where the priority is maximizing the return on investment in the long term. What clearly distinguishes them from market competition is their high efficiency in low-light conditions and precise quality control at every stage of cell production, which guarantees full repeatability of technical parameters. By choosing the TWMNH series, the investor gains the assurance of stable and failure-free system operation for many decades, making these panels one of the most cost-effective choices in today's modern photovoltaics market.

Ranking

1,089 panels in the segment TOPCon 450-500 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.50% 22.52% Typical 4,222
Power density 225.2 225.2 Typical 4,225
Temperature coefficient -0.280 -0.290 Strong · top 11% 1,309
Weight per kWp 46.4 52.2 Strong · top 17% 1,162
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Price offers

3 from shops we track
Shop Country Price Per kWp Stock Offer updated Link to shop
Sklep Soltech Poland 244.71 zł net 543.80 zł/kWp Not stated 15h ago Visit shop
pvshop.eu Germany 75.36 € net 167.47 €/kWp In stock 17h ago Visit shop
AZ Solar Shop Italy - - Not stated 17h ago Visit shop

Signals from the data

2 positive · 0 caution
Best for

Commercial, utility-scale and hot-climate.

Strengths
-0.280 %/°C temperature coefficient

Top 11% of the TOPCon 450-500 W segment, against a median of -0.290.

46.4 kg per kWp

Top 17% of the TOPCon 450-500 W segment, against a median of 52.2.

Notes from the database
  • Efficiency of 22.5% matches the TOPCon 450-500W median
  • Power density of 225.2 W/m² matches the TOPCon 450-500W median
  • Temperature coefficient of -0.28%/°C matches the TOPCon 450-500W median
  • At 20.9 kg, this panel is 3.1 kg lighter than TOPCon 450-500W median (24.0 kg) - easier handling during installation
  • Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface

Specifications

Open datasheet PDF
Nominal power (Pmax) 450 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.50 % Typical Segment median 22.52%
Vmpp · Impp 30.19 V · 14.91 A Operating point at max power
Voc · Isc 35.75 V · 15.95 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1762×1134×30 mm · 2.00 m² of roof
Weight 20.9 kg Strong Strong · 3.1 kg below median
Cells 96 · TOPCon Monocrystalline
Bifaciality 80 % Rear output as a share of front
Coefficient Pmax -0.280 %/°C Strong top 11% of its segment
Coefficient Voc · Isc -0.240 · 0.046 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 15 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 87.4 % Equals 393 W guaranteed
Degradation 1.00 → 0.40 % First year, then annual

Datasheet charts

Open datasheet PDF

Measured curves published by Tongwei in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 450 Wp appear here. The rest cover the whole series.

Linear Power Output Warranty Linear Power Output Warranty Whole series Cell temperature 25°C Cell temperature 25°C Whole series Power vs Voltage (P-V) curve Power vs Voltage (P-V) curve Whole series

Simulations

Live - change any input
Lifetime output & value
30 years at 1200 kWh/kWp/year and €0.50 per kWh
Power in year 30
-
Lifetime energy
-
Energy value
-
With bifacial gain
-

Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.

Heat losses
-0.280 %/°C against a segment median of -0.290
-
Bifacial gain
Rear gain over light concrete: -
-

Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.

Filter these
Size
Panel Power Eff. Temp. Weight Difference
Tongwei TWMNH-48HD450 450 W 22.50% -0.280 20.9 kg You are here
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +45 W, cooler, +2.3 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg +40 W, cooler, +2.0 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg +50 W, cooler, +2.0 pp
CIPRO-TN9C54M-500W 500 W 24.50% -0.260 21.4 kg +50 W, cooler, +2.0 pp
GK-3-54HGb-500M 500 W 24.50% -0.260 21.4 kg +50 W, cooler, +2.0 pp
GCL-NR10R/54BGDF 500 W 24.50% -0.260 24.6 kg +50 W, heavier, +2.0 pp
TWMNH-48HD430 430 W 21.50% -0.280 20.9 kg -20 W, -1.0 pp
TWMNH-48HD435 435 W 21.80% -0.280 20.9 kg -15 W, -0.7 pp
TWMNH-48HD440 440 W 22.00% -0.280 20.9 kg -10 W, -0.5 pp
TWMNH-48HD445 445 W 22.30% -0.280 20.9 kg Very close match
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +60 W, cooler, +2.5 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +55 W, cooler, +2.2 pp

Found 1395 panels of the same or similar size to this one, within ±10 mm. See them here Found 1425 panels of the same or similar size to this one, within ±25 mm. See them here Found 3614 panels of the same or similar size to this one, within ±50 mm. See them here Found 3962 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
How does N-type TOPCon cell technology in the Tongwei TWMNH series differ from traditional P-type cells?
N-type TOPCon cells used in the TWMNH series feature an additional passivation layer that significantly reduces electron recombination on the rear side of the cell. In practice, this delivers higher efficiency (often above 23%), lower degradation over time, and better performance at high temperatures compared to classic P-type PERC modules. It's a newer-generation technology now considered the premium standard in solar.
What warranty comes with Tongwei TWMNH panels and what does it cover?
The TWMNH series comes with a 15-year product warranty covering material and manufacturing defects, plus a 30-year linear power output warranty. This means the manufacturer guarantees a defined minimum energy generation level over three decades, with a slow, predictable power decline over time - an important factor when calculating long-term return on investment.
Are Tongwei TWMNH panels rated at 635 W suitable for residential installations, or only commercial ones?
TWMNH panels rated up to 635 Wp have large form factors and high output current, making them primarily designed for commercial, industrial, and utility-scale solar farm installations where maximizing power per square meter matters most. On a typical sloped residential roof they may be too large and heavy for convenient installation - smaller residential-class modules are usually a better fit in that case.
Are Tongwei TWMNH panels bifacial, generating power from the rear side as well?
No, TWMNH series panels in this configuration are mono-facial modules - they generate power only from the front side. This makes installation simpler and less dependent on ground reflectivity compared to bifacial panels, which need a bright, light-reflecting surrounding surface to fully exploit rear-side generation potential.
How do TWMNH panels perform during summer heat on a hot rooftop?
Thanks to TOPCon cell technology and Super Multi-Busbar (SMBB) design, the TWMNH series has a favorable power temperature coefficient, meaning less output loss as module temperature rises on hot days. These panels are also resistant to LID and LeTID degradation, caused by the combination of light exposure and high heat, so they retain more power in summer than typical P-type modules.
Is Tongwei a reliable Tier 1 solar panel manufacturer, and are TWMNH panels a safe investment choice?
Yes, Tongwei is a Chinese manufacturer classified as Tier 1, reflecting its financial stability, large-scale cell production, and long-standing international market presence. The TWMNH series undergoes rigorous quality control at every production stage, and these models remain in active production and available for purchase, making them a safe choice for long-term commercial investments.
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