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Talesun TD7G78M-580W
Talesun Brand review

TD7G78M-580W

580 Wp PERC Bifacial 70%
ComparePV verdict

Warranty pick, heavy for its output

Rank 6,672 of 14,005
Compare panels Datasheet PDF
Power (Wp)
580
Typical for its class
Efficiency (%)
20.70
Weak · bottom 8%
Density (Wp/m²)
207.5
Weak · bottom 10%
Temp (%/°C)
-0.350
Typical · median -0.350
Weight (kg)
35.0
Weak · 4.2 kg above median
Warranty (yrs)
30
Strong · top 25%

The Talesun TD7G78M (BIPRO) series comprises bifacial glass-glass modules designed for stable energy production even in non-ideal roof or ground conditions. The application of bifacial PERC technology enables the utilization of reflected radiation from the substrate, translating to a real energy yield gain compared to monofacial panels. Thanks to 10BB and half-cut design, the module performs better against micro-cracking and resistive losses, and demonstrates stable operation even with partial shading. The series employs waffle diffused galley, which limits power degradation over time and facilitates predictable long-term energy production. Investors calculating LCOE and seeking to mitigate revenue underestimation will particularly value this feature. An additional advantage is enhanced resistance to PID and a sealed connector box with IP68 rating, making this series an excellent choice for utility-scale PV farms, commercial installations, and projects in humid, windy, or dusty environments.

Ranking

589 panels in the segment PERC 550-600 W
Metric This panel Median Position in segment Overall rank
Module efficiency 20.70% 21.29% Weak · bottom 8% 10,764
Power density 207.5 212.9 Weak · bottom 10% 10,596
Temperature coefficient -0.350 -0.350 Typical 10,419
Weight per kWp 60.3 52.7 Weak · bottom 6% 12,438
Performance warranty 30 yrs 27 yrs Strong · top 25% 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

1 positive · 3 caution
Best for

Commercial, utility-scale and shaded-installations.

Not ideal for

Weight-limited structures, tight roof space and roofs where every square metre has to count.

Strengths
30 year performance warranty

Top 25% of the PERC 550-600 W segment, against a median of 27 yrs.

Watch-outs
60.3 kg per kWp

Bottom 6% of the PERC 550-600 W segment, against a median of 52.7. Ranked 12,438th in the whole database.

20.70% module efficiency

Bottom 8% of the PERC 550-600 W segment, against a median of 21.29%. Ranked 10,764th in the whole database.

207.5 watts per square metre

Bottom 10% of the PERC 550-600 W segment, against a median of 212.9. Ranked 10,596th in the whole database.

Notes from the database
  • Module efficiency of 20.7% is 0.6pp below average for PERC 550-600W panels (median: 21.3%)
  • At 207.5 W/m², this panel generates 5.4 W/m² less per unit area than PERC 550-600W median (212.9 W/m²)
  • At -0.35%/°C, hot weather performance is typical for PERC 550-600W panels
  • At 35.0 kg, this panel is 4.2 kg heavier than the PERC 550-600W median (30.8 kg) - more demanding for installation crews
  • Bifacial design (70% factor) captures reflected light - adds 4-10% yield on ground-mount or white roof

Specifications

Open datasheet PDF
Nominal power (Pmax) 580 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 20.70 % Weak Segment median 21.29%
Vmpp · Impp 44.97 V · 12.90 A Operating point at max power
Voc · Isc 53.59 V · 13.79 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2465×1134×35 mm · 2.80 m² of roof
Weight 35.0 kg Weak Weak · 4.2 kg above median
Cells 156 · PERC Monocrystalline
Bifaciality 70 % Rear output as a share of front
Coefficient Pmax -0.350 %/°C Typical median -0.350 of its segment
Coefficient Voc · Isc -0.260 · 0.048 %/°C
NOCT 43 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 30 years Strong top 25% · median 27 yrs
End-of-warranty output 85.0 % Equals 493 W guaranteed
Degradation 2.00 → 0.45 % First year, then annual

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
-0.350 %/°C against a segment median of -0.350
-
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 TD7G78M-580W 580 W 20.70% -0.350 35.0 kg You are here
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg Cooler, lighter, +4.1 pp
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg Cooler, lighter, +3.9 pp
AIKO-A630-MAH72Dw 630 W 24.40% -0.260 32.5 kg +50 W, cooler, +3.7 pp
LR7-60HVHL-550M 550 W 24.40% -0.260 16.3 kg Cooler, 19 kg lighter, +3.7 pp
JAT60S40-540/LR 540 W 24.40% -0.260 23.5 kg Cooler, lighter, +3.7 pp
TP7F78M-585W 585 W 20.90% -0.350 31.5 kg Lighter, -5 yr warranty
TP7F78M-590W 590 W 21.10% -0.350 31.5 kg Lighter, +0.4 pp, -5 yr warranty
TP7F78M-595W 595 W 21.30% -0.350 31.5 kg Lighter, +0.6 pp, -5 yr warranty
TP7F78M-600W 600 W 21.50% -0.350 31.5 kg Lighter, +0.8 pp, -5 yr warranty
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg +100 W, cooler, +4.5 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg +95 W, cooler, +4.3 pp
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg +120 W, cooler, +4.3 pp
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg +115 W, cooler, +4.2 pp
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg +90 W, cooler, +4.1 pp
LR7-72HVHF-670M 670 W 24.80% -0.260 28.5 kg +90 W, cooler, +4.1 pp
JKM650-670N-66QL6-BDV (670W class) 670 W 24.80% -0.260 32.5 kg +90 W, cooler, +4.1 pp

Found 616 panels of the same or similar size to this one, within ±10 mm. See them here Found 616 panels of the same or similar size to this one, within ±25 mm. See them here Found 616 panels of the same or similar size to this one, within ±50 mm. See them here Found 1813 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
Is the Talesun TD7G78M (BIPRO) series still available for purchase?
No, production of the TD7G78M (BIPRO) series has ended and the model has been discontinued from Talesun's current lineup. Panels from this series may still be found through distributors clearing remaining stock, but availability is limited. When planning to expand an existing installation, check with a supplier for stock levels and mechanical compatibility with pallets or containers of modules you already own.
What does bifacial technology add to the TD7G78M panels, and does it actually increase energy yield?
Bifacial PERC cells let the rear side of the module capture light reflected off the ground, a light-colored roof, or snow cover. With proper mounting height and a bright surface below, the extra yield typically ranges from a few to over ten percent compared to a monofacial panel. Best results are achieved on ground-mount arrays, flat roofs with east-west layouts, or trackers, where the rear side has unobstructed access to reflected light.
What warranty comes with the Talesun TD7G78M panels and what does it cover?
The TD7G78M series is backed by a 12-year product warranty covering material and workmanship defects, plus a 30-year linear power warranty guaranteeing a minimum output level over that period. This is a standard offering from tier 1 manufacturers and gives investors confidence when calculating returns over a 25-30 year horizon.
How does the half-cut, 10BB design in the TD7G78M differ from standard panels, and how does it perform under partial shading?
Half-cut cells combined with 10 busbars reduce resistive losses and split current load across smaller module segments. As a result, under partial shading from a chimney, antenna, or fallen leaf, the overall power drop is smaller than in a conventional full-cell design. The technology also lowers the risk of microcracks forming during transport and installation.
What installations are TD7G78M panels best suited for - residential, utility-scale PV farms, or commercial projects?
Thanks to the glass-glass construction, enhanced PID resistance, and sealed IP68 junction box, this series performs particularly well in large PV farms, commercial installations, and projects located in humid, windy, or dusty environments. The bifacial design also favors ground-mount or flat-roof installations, where the rear side gains access to reflected light, maximizing return on investment.
Do the gallium-doped wafers in the TD7G78M actually reduce power degradation over time?
Yes, gallium doping instead of traditional boron doping reduces light-induced degradation (LID) in the module's early hours and years of operation. In practice, this results in a more predictable power decline curve consistent with the declared 30-year linear warranty, helping investors calculate LCOE more accurately and reducing the risk of underestimating annual energy yields.
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