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RedSolar Brand review

CETC-640T(GDF)/156

640 Wp TOPCon Bifacial 80%
ComparePV verdict

Middle of its segment, weak in heat

Rank 2,059 of 14,005
Compare panels Datasheet PDF
Power (Wp)
640
Strong · top 9%
Efficiency (%)
22.90
Typical · median 22.80%
Density (Wp/m²)
229.0
Typical · median 227.7
Temp (%/°C)
-0.300
Weak · bottom 19%
Weight (kg)
33.2
Typical · median 32.7 kg
Warranty (yrs)
30
Typical · median 30 yrs

The M10-MBB TOPCon Mono Bifacial Module series answers the growing demand from investors seeking maximum energy yield on limited installation space. The panels use N-Type TOPCon cells arranged in a half-cell layout with multi busbar (MBB) technology, delivering better high-temperature performance, lower sensitivity to partial shading, and reduced risk of hot spots. The use of bifacial cells further captures reflected radiation from the ground, boosting energy output without increasing the installation footprint, which directly translates into a lower LCOE. The module's construction is engineered for long-term reliability - resistance to PID, ammonia corrosion, and salt mist makes the series well suited for agricultural, coastal, and industrial installations where environmental conditions are particularly demanding. Low first-year power degradation and a stable linear performance curve over the following years make this series an attractive choice for investors focused on predictable return on investment. It's a solution dedicated to commercial and industrial installations, where every watt of power per square meter of roof or ground counts.

Ranking

1,086 panels in the segment TOPCon 600-650 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.90% 22.80% Typical 2,359
Power density 229.0 227.7 Typical 2,389
Temperature coefficient -0.300 -0.290 Weak · bottom 19% 6,093
Weight per kWp 51.9 53.1 Typical 5,293
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

5 positive · 3 caution
Best for

Commercial and utility-scale.

Not ideal for

Hot climates.

Watch-outs
-0.300 %/°C temperature coefficient

Bottom 19% of the TOPCon 600-650 W segment, against a median of -0.290.

What owners get
N-type TOPCon cells with MBB layout

The use of N-type TOPCon cells with multi busbar (MBB) technology reduces resistive losses and lowers sensitivity to partial shading compared to older PERC cells, resulting in higher real-world energy yield.

30-year linear power warranty

A 30-year power warranty combined with a 12-year product warranty matches the current premium standard for TOPCon modules, giving investors a predictable degradation profile with a low first-year power loss (typically around 1%).

Bifacial technology boosting energy yield

The double-sided cell structure (manufacturer-declared bifaciality up to approximately 80%) captures reflected radiation from the ground, increasing energy production from the same mounting area without additional installation costs, directly lowering LCOE.

Resistance to ammonia corrosion and salt mist

Certified resistance to PID, ammonia corrosion, and salt mist widens the series' applicability beyond standard commercial installations - the modules are suitable for demanding agricultural and coastal environments where material degradation is a common issue for cheaper series.

High power output within standard M10 form factor

Power output of 620-640 Wp in the standard M10 wafer format means higher power density per square meter of roof or ground than earlier module generations of the same size, easing system design where mounting space is limited.

Trade-offs
Efficiency below segment leaders

The maximum efficiency of 22.9% is lower than comparable TOPCon models from competitors - Luxen Solar N5 (23.14%) and Hanersun Hitouch 6N (23.3%) at the same 640 Wp maximum power. The 0.4-0.5 pp gap can translate into lower energy yield from the same area in space-constrained installations.

No confirmed BNEF Tier-1 status

Unlike established brands such as REC, RedSolar does not appear on publicly available BloombergNEF Tier-1 lists, which can matter for institutional investors and project bankability since this classification affects commercial bank financing terms.

Notes from the database
  • At 22.9% efficiency, this panel is on par with typical TOPCon 600-650W modules
  • At 228.9 W/m² power density, roof space requirements are typical for TOPCon 600-650W panels
  • At -0.30%/°C, hot weather performance is typical for TOPCon 600-650W panels
  • Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof
  • In the top 17% for efficiency among all TOPCon panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 640 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.90 % Typical Segment median 22.80%
Vmpp · Impp 47.16 V · 13.57 A Operating point at max power
Voc · Isc 55.57 V · 14.42 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2465×1134×30 mm · 2.80 m² of roof
Weight 33.2 kg Typical Typical · median 32.7 kg
Cells 156 · TOPCon Monocrystalline
Bifaciality 80 % Rear output as a share of front
Coefficient Pmax -0.300 %/°C Weak bottom 19% of its segment
Coefficient Voc · Isc -0.250 · 0.045 %/°C
NOCT 42 °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 559 W guaranteed
Degradation 1.00 → 0.40 % First year, then annual

Datasheet charts

Open datasheet PDF

Measured curves published by RedSolar in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 640 Wp appear here. The rest cover the whole series.

Excellent Power Guarantee Excellent Power Guarantee Whole series P-V Curves of PV Module P-V Curves of PV Module Whole series I-V Curves of PV Module I-V Curves of PV Module 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
-0.300 %/°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.

Alternatives

All RedSolar panels
Filter these
Size
Panel Power Eff. Temp. Weight Difference
RedSolar CETC-640T(GDF)/156 640 W 22.90% -0.300 33.2 kg You are here
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg Cooler, lighter, +2.3 pp
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg +40 W, lighter, +2.3 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg Cooler, lighter, +2.1 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg Cooler, lighter, +2.1 pp
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg Cooler, lighter, +1.9 pp
LR7-72HVHF-670M 670 W 24.80% -0.260 28.5 kg Cooler, lighter, +1.9 pp
AIKO-A640-MAE72Mw 640 W 24.80% -0.260 27.0 kg Cooler, lighter, +1.9 pp
CETC-620T(GDF)/156 620 W 22.18% -0.300 33.2 kg -20 W, -0.7 pp
CETC-625T(GDF)/156 625 W 22.36% -0.300 33.2 kg -15 W, -0.5 pp
CETC-630T(GDF)/156 630 W 22.54% -0.300 33.2 kg -10 W, -0.4 pp
CETC-635T(GDF)/156 635 W 22.72% -0.300 33.2 kg Very close match
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg +60 W, cooler, +2.1 pp
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg +55 W, cooler, +2.0 pp
JKM650-670N-66QL6-BDV (670W class) 670 W 24.80% -0.260 32.5 kg +30 W, cooler, +1.9 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
How does TOPCon technology in RedSolar M10-MBB panels differ from classic PERC cells?
The N-Type TOPCon cells used in the M10-MBB series offer higher efficiency and lower power degradation than older P-Type PERC cells. An additional passivation layer reduces electron recombination, resulting in better performance at high temperatures and higher energy yield, especially in summer when modules heat up significantly.
What are the practical benefits of bifacial design in M10-MBB panels?
Bifacial panels in the M10-MBB series capture sunlight on the rear side as well, allowing them to use light reflected from the roof, ground, gravel, or snow. Depending on the albedo of the surface and mounting height, this can add several to over ten percent extra energy yield without increasing the installation footprint, which lowers LCOE.
What warranty comes with RedSolar M10-MBB TOPCon panels?
The manufacturer provides a 12-year product warranty covering material and workmanship defects, plus a 30-year linear power warranty. This means a guaranteed, gradually declining power output level over three decades of operation, giving investors predictable returns on their installation.
Are the 640 Wp M10-MBB panels suitable for large commercial roof installations?
Yes, output up to 640 Wp per module combined with half-cell and multi busbar technology makes this series well suited for commercial and industrial installations, where maximizing power yield per square meter of roof or ground area is critical. High unit power reduces the number of modules needed and speeds up installation on large surfaces.
Are RedSolar M10-MBB panels suitable for coastal or agricultural installations?
Yes, modules in this series are resistant to ammonia corrosion and salt mist, making them suitable for both livestock farm installations and coastal areas with high air salinity. Additional PID resistance ensures stable system performance under demanding environmental conditions throughout the operating life.
How much power degradation do M10-MBB panels experience in the first year?
Thanks to N-Type TOPCon technology, M10-MBB panels show lower first-year power degradation compared to classic P-Type modules, and maintain a stable, linear degradation curve in subsequent years consistent with the 30-year power warranty.
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