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Talesun TM3G66M-620
Talesun Brand review

TM3G66M-620

620 Wp N-type Bifacial 80%
ComparePV verdict

Solid all-round for its segment

Rank 2,549 of 14,005
Compare panels Datasheet PDF
Power (Wp)
620
Typical for its class
Efficiency (%)
23.00
Typical · median 22.77%
Density (Wp/m²)
229.5
Typical · median 227.7
Temp (%/°C)
-0.290
Typical · median -0.290
Weight (kg)
33.7
Typical · median 32.5 kg
Warranty (yrs)
30
Typical · median 30 yrs

Talesun BIPRO TM3G66M photovoltaic panels are an advanced solution based on bifacial technology, which allows for the generation of additional energy from radiation reflected off the ground. The use of a double glass design makes these modules exceptionally resistant to extreme weather conditions, micro-cracks, and PID degradation processes. Thanks to the use of half-cut cells and 10BB technology, this series effectively minimizes power losses resulting from partial shading and reduces internal resistance, which directly translates into higher efficiency of the entire system. This solves the key problem of limited installation space, offering a significantly higher energy yield from the same area compared to monofacial counterparts. This series is primarily dedicated to professional photovoltaic farms and large commercial installations, where lowering the LCOE is crucial. What distinguishes it from the competition is its above-average mechanical durability and the stability of electrical parameters at high temperatures, making it a safe investment for many years. Choosing this series is a guarantee of maximizing profits by utilizing the albedo effect, especially on bright surfaces or tracking systems. The use of M10 standard silicon wafers further optimizes logistics and installation costs, providing a real economic advantage for contractors and investors.

Ranking

359 panels in the segment N-type 600-650 W
Metric This panel Median Position in segment Overall rank
Module efficiency 23.00% 22.77% Typical 1,919
Power density 229.5 227.7 Typical 2,191
Temperature coefficient -0.290 -0.290 Typical 2,165
Weight per kWp 54.4 52.7 Typical 8,659
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

0 positive · 0 caution
Best for

Utility-scale, commercial, shaded-installations and hot-climate.

Notes from the database
  • Efficiency of 23.0% matches the N-type 600-650W median
  • At 229.5 W/m² power density, roof space requirements are typical for N-type 600-650W panels
  • Temperature coefficient of -0.29%/°C matches the N-type 600-650W median
  • At 33.7 kg (1.2 kg above N-type 600-650W median of 32.5 kg), requires checking roof load capacity
  • Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface

Specifications

Open datasheet PDF
Nominal power (Pmax) 620 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 23.00 % Typical Segment median 22.77%
Vmpp · Impp 41.20 V · 15.05 A Operating point at max power
Voc · Isc 49.60 V · 15.94 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2382×1134×30 mm · 2.70 m² of roof
Weight 33.7 kg Typical Typical · median 32.5 kg
Cells 132 · N-type Monocrystalline
Bifaciality 80 % Rear output as a share of front
Coefficient Pmax -0.290 %/°C Typical median -0.290 of its segment
Coefficient Voc · Isc -0.240 · 0.043 %/°C
NOCT 43 °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

Datasheet charts

Open datasheet PDF

Measured curves published by Talesun in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 620 Wp appear here. The rest cover the whole series.

30-Year Linear Performance Warranty 30-Year Linear Performance Warranty 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
-0.290 %/°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
Talesun TM3G66M-620 620 W 23.00% -0.290 33.7 kg You are here
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg +30 W, lighter, +2.2 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg Cooler, lighter, +2.0 pp
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg +50 W, lighter, +1.8 pp
LR7-72HVHF-670M 670 W 24.80% -0.260 28.5 kg +50 W, lighter, +1.8 pp
AIKO-A640-MAE72Mw 640 W 24.80% -0.260 27.0 kg Cooler, lighter, +1.8 pp
JKM650-670N-66QL6-BDV (670W class) 670 W 24.80% -0.260 32.5 kg +50 W, cooler, +1.8 pp
TM3G66M-600 600 W 22.20% -0.290 33.7 kg -20 W, -0.8 pp
TM3G66M-605 605 W 22.40% -0.290 33.7 kg -15 W, -0.6 pp
TM9G72M-610W 610 W 22.60% -0.290 33.8 kg -10 W, -0.4 pp
TM9G72M-615W 615 W 22.80% -0.290 33.8 kg Very close match
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg +60 W, lighter, +2.2 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg +55 W, lighter, +2.0 pp
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg +80 W, cooler, +2.0 pp
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg +75 W, cooler, +1.9 pp

Found 1119 panels of the same or similar size to this one, within ±10 mm. See them here Found 1125 panels of the same or similar size to this one, within ±25 mm. See them here Found 1236 panels of the same or similar size to this one, within ±50 mm. See them here Found 1917 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
How does the Talesun BIPRO TM3G66M panel differ from standard monofacial panels?
The key difference is bifacial technology – the module generates power from both sides, capturing reflected light (albedo) from the ground surface. This results in a higher energy yield from the same roof or ground area compared to conventional monofacial panels, especially on light-colored surfaces, gravel, or with tracker systems. The double glass construction also protects the cells from moisture and PID degradation.
What warranty comes with the Talesun BIPRO TM3G66M panels?
The manufacturer provides a 12-year product warranty and a 30-year linear power output warranty. This means the panels maintain a guaranteed production level throughout their service life, with annual power degradation limited to a minimal rate. As a Tier 1 manufacturer, Talesun offers financial stability that supports fulfillment of long-term service obligations.
Are the Talesun BIPRO TM3G66M panels suitable for large solar farms?
Yes, the BIPRO TM3G66M series is primarily designed for professional solar farms and large commercial installations. With power output up to 630 Wp, bifacial technology, and N-type half-cut cells, these panels help lower the LCOE by delivering higher energy yield from fewer modules, reducing costs for mounting structures and cabling at scale.
What is N-type cell technology in the TM3G66M panels, and is it worth choosing?
N-type cells have lower light-induced degradation (LID) and better performance at high temperatures and low light compared to older P-type technology. Combined with the half-cut cell design and 10BB busbar layout, they minimize power loss from partial shading and reduce internal resistance, resulting in higher and more stable energy production throughout the system's lifetime.
Are Talesun BIPRO TM3G66M bifacial panels suitable for roofs, or only ground-mount systems?
While the full potential of bifacial technology is realized with ground-mount or tracker installations over a light-reflective surface, these panels can also be used on flat roofs with adequate clearance below the module. The double glass construction provides high mechanical rigidity and durability, making it suitable for commercial rooftop installations with ballasted mounting systems.
Is the Talesun BIPRO TM3G66M series still available for purchase?
Yes, the BIPRO TM3G66M series remains in the manufacturer's active lineup and has not been discontinued. As a Tier 1 manufacturer based in China, Talesun continues to supply this bifacial module line for both large commercial installations and utility-scale solar farms, making it a safe long-term choice in terms of parts availability and warranty support.
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