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Tongwei TWMND-72 HD590
Tongwei Brand review

TWMND-72 HD590

590 Wp TOPCon Bifacial 80%
ComparePV verdict

Strong in heat, no clear weak spot

Rank 3,836 of 14,129
Compare panels Datasheet PDF
Power (Wp)
590
Strong · top 18%
Efficiency (%)
22.80
Strong · top 22%
Density (Wp/m²)
228.4
Strong · top 17%
Temp (%/°C)
-0.280
Strong · top 5%
Weight (kg)
31.5
Typical · median 31.2 kg
Warranty (yrs)
30
Typical · median 30 yrs

The Tongwei TWMND series is an advanced solution based on N-type TOPCon cell technology, which sets new standards for efficiency in difficult lighting conditions. Thanks to the use of this innovative cell type, the modules are characterized by almost zero initial degradation effect and a significantly lower annual power drop, guaranteeing energy stability for investors for decades. A key feature of the series is its excellent temperature coefficient, allowing for high yields even during summer heat when traditional panels lose efficiency. The design utilizing a multi-busbar (MBB) system shortens the electron flow path and reduces the risk of micro-cracks, which directly increases the mechanical reliability of the product. The TWMND series is designed for demanding residential users and commercial projects where maximizing profit from the available roof or ground area matters. What sets these panels above the competition is full control over silicon purity, resulting from the manufacturer's position as a leader in raw material production, which translates into exceptional durability and consistency of parameters for every module. It is an uncompromising choice for those looking for modern technology that realistically shortens the return on investment in photovoltaics.

Ranking

1,022 panels in the segment TOPCon 550-600 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.80% 22.44% Strong · top 22% 2,769
Power density 228.4 224.4 Strong · top 17% 2,653
Temperature coefficient -0.280 -0.290 Strong · top 5% 1,347
Weight per kWp 53.4 53.8 Typical 7,361
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

3 positive · 0 caution
Best for

Residential, commercial and hot-climate.

Strengths
-0.280 %/°C temperature coefficient

Top 5% of the TOPCon 550-600 W segment, against a median of -0.290. Ranked 1,347th in the whole database.

228.4 watts per square metre

Top 17% of the TOPCon 550-600 W segment, against a median of 224.4.

22.80% module efficiency

Top 22% of the TOPCon 550-600 W segment, against a median of 22.44%.

Notes from the database
  • At 22.8% efficiency, this panel is on par with typical TOPCon 550-600W modules
  • 228.4 W/m² power density - 4.0 W/m² more than TOPCon 550-600W median (224.4 W/m²), more power per roof area
  • Temperature coefficient of -0.28%/°C matches the TOPCon 550-600W median
  • 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces
  • #2769 for efficiency, #1347 for temperature performance out of 14129 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 590 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.80 % Strong Segment median 22.44%
Vmpp · Impp 44.27 V · 13.33 A Operating point at max power
Voc · Isc 52.70 V · 13.95 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2278×1134×30 mm · 2.58 m² of roof
Weight 31.5 kg Typical Typical · median 31.2 kg
Cells 144 · TOPCon Monocrystalline
Bifaciality 80 % Rear output as a share of front
Coefficient Pmax -0.280 %/°C Strong top 5% of its segment
Coefficient Voc · Isc -0.240 · 0.046 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 87.4 % Equals 516 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 590 Wp appear here. The rest cover the whole series.

Linear Power Output Warranty Linear Power Output Warranty Whole series I-V Curve, Cell temperature 25°C I-V Curve, Cell temperature 25°C Whole series P-V Curve (Power vs Voltage) P-V Curve (Power vs Voltage) 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 TWMND-72 HD590 590 W 22.80% -0.280 31.5 kg You are here
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg -30 W, lighter, +2.0 pp
AIKO-A640-MAE72Mw 640 W 24.80% -0.260 27.0 kg +50 W, lighter, +2.0 pp
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg -35 W, lighter, +1.8 pp
AIKO-A635-MAE72Mw 635 W 24.60% -0.260 27.0 kg +45 W, lighter, +1.8 pp
AIKO-A630-MAH72Dw 630 W 24.40% -0.260 32.5 kg +40 W, cooler, +1.6 pp
LR7-60HVHL-550M 550 W 24.40% -0.260 16.3 kg -40 W, 15 kg lighter, +1.6 pp
TWMND-72 HD575 575 W 22.30% -0.280 31.5 kg -15 W, -0.5 pp
TWMND-72HD580 580 W 22.50% -0.280 31.5 kg -10 W, -0.3 pp
TWMND-72HD585 585 W 22.60% -0.280 31.5 kg Very close match
TWMND-72HD595 595 W 23.00% -0.280 31.5 kg Very close match
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg +60 W, lighter, +2.4 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg +55 W, lighter, +2.2 pp

Found 2327 panels of the same or similar size to this one, within ±10 mm. See them here Found 2369 panels of the same or similar size to this one, within ±25 mm. See them here Found 2383 panels of the same or similar size to this one, within ±50 mm. See them here Found 2548 panels of the same or similar size to this one, within ±100 mm. See them here

About the TWMND series

6 answered

These answers cover the whole series. Where a figure differs, the specification above is this module's own.

How does the N-type TOPCon technology in Tongwei TWMND panels differ from older P-type PERC cells?
The N-type TOPCon cells used in the TWMND series deliver higher base efficiency and near-zero initial light-induced degradation (LID), which noticeably reduces power output in P-type PERC panels within the first days of operation. TOPCon also has a lower annual degradation rate, which, combined with the 30-year power warranty, translates into higher total energy yield over the system's lifetime compared to older technologies.
What warranty comes with Tongwei TWMND panels and what does it cover?
The TWMND series comes with a 12-year product warranty covering material and manufacturing defects, plus a 30-year linear power warranty guaranteeing a minimum percentage of rated output over time. These are among the longer warranty periods available on the market, making the series an attractive investment for both residential and commercial projects.
What is multi-busbar (MBB) technology in Tongwei TWMND panels and why does it matter?
Multi-busbar (MBB) technology uses a larger number of thin conductive paths on the cell surface instead of a few wide soldered ribbons. This shortens the electron flow path, reduces resistive losses, and significantly lowers the risk of micro-cracks during transport, installation, and operation. In practice, this results in higher mechanical reliability of the TWMND modules and more stable long-term energy output.
Do Tongwei TWMND panels lose performance in hot weather?
The TWMND series has a favorable temperature coefficient of power, typical of N-type TOPCon technology, meaning performance drop at high module operating temperatures is smaller than with panels based on older P-type cells. In practice, this results in higher energy yields on hot summer days, when traditional PERC panels start losing significant efficiency once module temperature exceeds 25°C.
Are Tongwei TWMND panels bifacial?
No, panels in this TWMND configuration are monofacial modules - they generate power only from the front side. This is well suited to installations where mounting on bifacial racking with reflected ground light isn't practical, such as sloped roofs. Customers looking for extra yield from reflected light should check other bifacial series in Tongwei's lineup.
How many Tongwei TWMND 645 Wp panels are needed for a roughly 5 kWp system?
With a maximum module output of 645 Wp, 8 panels are enough for a system of around 5 kWp (8 x 645 W ≈ 5.16 kWp). The high per-module power lets you reach a larger system size with fewer modules, reducing installation costs, the number of optimizers or microinverters needed, and the roof area required.
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