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Talesun TM7G54M/420W
Talesun Brand review

TM7G54M/420W

420 Wp TOPCon Bifacial 80%
ComparePV verdict

Middle of its segment, heavy for its output

Rank 10,290 of 14,005
Compare panels Datasheet PDF
Power (Wp)
420
Weak · bottom 16%
Efficiency (%)
21.50
Weak · bottom 17%
Density (Wp/m²)
215.1
Weak · bottom 19%
Temp (%/°C)
-0.290
Typical · median -0.290
Weight (kg)
24.5
Weak · 2.5 kg above median
Warranty (yrs)
30
Typical · median 30 yrs

Talesun™ TM7G54M (BIPRO) are bifacial modules designed for maximum energy yield where every square meter of roof or structure counts. The application of N-type TOPCon cells helps minimize typical power losses over time and maintains high production even after many seasons of operation. Thanks to bifacial technology, the module actively utilizes reflected light from the ground-real advantage on light-colored roofs, carports, geotextile or gravel-covered ground, and also in vertical installations.

The dual glass construction is noteworthy, increasing resistance to moisture, dust, and demanding environmental conditions, while also facilitating stable operation in locations subjected to loads and variable temperatures. Built-in Anti-PID solutions and a sealed connector box support long-term reliability.

TM7G54M (BIPRO) is an excellent choice for premium homes, businesses, and PV farms that want to reduce LCOE without compromising on durability and aesthetics.

Ranking

1,218 panels in the segment TOPCon 400-450 W
Metric This panel Median Position in segment Overall rank
Module efficiency 21.50% 22.00% Weak · bottom 17% 7,958
Power density 215.1 220.2 Weak · bottom 19% 7,882
Temperature coefficient -0.290 -0.290 Typical 2,165
Weight per kWp 58.3 51.4 Weak · bottom 8% 11,670
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 · 3 caution
Best for

Residential and commercial.

Not ideal for

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

Watch-outs
58.3 kg per kWp

Bottom 8% of the TOPCon 400-450 W segment, against a median of 51.4. Ranked 11,670th in the whole database.

21.50% module efficiency

Bottom 17% of the TOPCon 400-450 W segment, against a median of 22.00%.

215.1 watts per square metre

Bottom 19% of the TOPCon 400-450 W segment, against a median of 220.2.

Notes from the database
  • Efficiency of 21.5% matches the TOPCon 400-450W median
  • At 215.1 W/m², this panel generates 5.1 W/m² less per unit area than TOPCon 400-450W median (220.2 W/m²)
  • At -0.29%/°C, hot weather performance is typical for TOPCon 400-450W panels
  • Weight of 24.5 kg is 2.5 kg above TOPCon 400-450W median (22.0 kg) - verify structural support
  • Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof

Specifications

Open datasheet PDF
Nominal power (Pmax) 420 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.50 % Weak Segment median 22.00%
Vmpp · Impp 32.42 V · 12.96 A Operating point at max power
Voc · Isc 38.70 V · 13.57 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1722×1134×30 mm · 1.95 m² of roof
Weight 24.5 kg Weak Weak · 2.5 kg above median
Cells 108 · TOPCon 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 15 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 87.4 % Equals 367 W guaranteed
Degradation 1.00 → 0.40 % First year, then annual

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 420 Wp appear here. The rest cover the whole series.

Talesun Solar Linear Warranty Talesun Solar Linear 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 TM7G54M/420W 420 W 21.50% -0.290 24.5 kg You are here
JST-EDMH-(445-465)W-TD (465W class) 465 W 23.81% -0.300 20.5 kg +45 W, lighter, +2.3 pp
LX-465M/182R-96+ GG 465 W 23.80% -0.260 23.5 kg +45 W, cooler, +2.3 pp
SPR-MAX7-470 470 W 23.70% -0.270 21.1 kg +50 W, +2.2 pp, +10 yr warranty
AIKO-A470-MAH54Mb 470 W 23.60% -0.260 21.5 kg +50 W, lighter, +2.1 pp
AIKO-A460-MAH54Mb 460 W 23.60% -0.290 20.5 kg +40 W, lighter, +2.1 pp
HSM-BD54-LA470 470 W 23.60% -0.260 21.5 kg +50 W, lighter, +2.1 pp
TP7F54M-390W 390 W 20.00% -0.350 21.5 kg Hotter, -1.5 pp, -5 yr warranty
TP7F54M-395W 395 W 20.20% -0.350 21.5 kg Hotter, -1.3 pp, -5 yr warranty
TP7F54M-400W 400 W 20.50% -0.350 21.5 kg Hotter, -1.0 pp, -5 yr warranty
TP7F54M-405W 405 W 20.70% -0.350 21.5 kg Hotter, -0.8 pp, -5 yr warranty
TP7G54M/410W 410 W 21.00% -0.350 21.5 kg Hotter, lighter, -5 yr warranty
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +90 W, cooler, +3.5 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +75 W, lighter, +3.3 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +85 W, cooler, +3.2 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg +70 W, lighter, +3.0 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg +80 W, cooler, +3.0 pp

Found 1783 panels of the same or similar size to this one, within ±10 mm. See them here Found 1914 panels of the same or similar size to this one, within ±25 mm. See them here Found 3392 panels of the same or similar size to this one, within ±50 mm. See them here Found 3970 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
How does the bifacial technology in Talesun TM7G54M (BIPRO) panels differ from standard monofacial panels?
TM7G54M (BIPRO) panels generate power from both sides of the module - the front side works like a standard panel, while the rear side additionally captures light reflected from the surrounding surface (roof, gravel, geotextile, or light-colored ground). This delivers a real energy yield gain without increasing installation area, especially noticeable on bright roofs, carports, or in vertical mounting. The dual glass construction also protects the rear cells, enabling this bifacial gain.
What warranty comes with Talesun TM7G54M (BIPRO) panels and what does it cover?
The manufacturer provides a 15-year product warranty and a 30-year power performance warranty, guaranteeing around 84.8% of nominal power after that period. Talesun is a Tier 1 manufacturer, meaning strong financial stability and a realistic chance of honoring warranty terms over the full period. Annual power degradation is low - up to 1% in the first year and about 0.4% per year afterward.
What is the maximum power of the TM7G54M (BIPRO) panel and what installations is it suited for?
The series reaches up to 440 Wp of maximum power using 108 N-type TOPCon half-cut cells with 16BB busbar technology. Combining high power output, bifacial gain, and a robust dual glass construction, the panel works well for premium residential homes as well as commercial and utility-scale PV farms, where maximizing yield from available roof or ground area is the priority.
Do Talesun TM7G54M (BIPRO) panels require reinforced roof mounting because of the dual glass construction?
The panel weighs about 24.5 kg at dimensions of 1722x1134x30 mm, somewhat more than backsheet modules, which should be factored into roof load calculations. However, it's rated to withstand up to 5400 Pa of snow load and 2400 Pa of wind load, so standard roof and ground-mount racking systems with clamps designed for glass-glass modules are fully suitable, as long as the extra weight is accounted for in the design.
Do TM7G54M (BIPRO) panels perform well in hot summer conditions on the roof?
Yes. The panel has a power temperature coefficient of -0.29%/°C, which is better (lower) than many older cell technologies. This means smaller power losses as modules heat up on hot days. This is thanks to the N-type TOPCon cells, which are less sensitive to high temperatures than classic P-type PERC cells, resulting in more stable energy production during summer.
Do Talesun TM7G54M (BIPRO) panels have protection against PID?
Yes, the modules have passed a 192-hour Anti-PID resistance test and include protection against Potential Induced Degradation. This matters especially in larger installations with high system voltage, where PID can cause permanent and hard-to-reverse power loss in the modules over time.
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