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Yingli YL645CF78 e/2
Yingli Brand review

YL645CF78 e/2

645 Wp TOPCon Bifacial 80%
ComparePV verdict

Solid all-round for its segment

Rank 1,840 of 14,129
Compare panels Datasheet PDF
Power (Wp)
645
Strong · top 3%
Efficiency (%)
23.10
Typical · median 22.80%
Density (Wp/m²)
230.7
Typical · median 227.7
Temp (%/°C)
-0.290
Typical · median -0.290
Weight (kg)
34.5
Typical · median 32.8 kg
Warranty (yrs)
30
Typical · median 30 yrs

The Yingli PANDA 3.0 Pro 1 series is designed to maximize energy output precisely when conventional modules begin to lose their edge - in the morning, evening, and under diffuse light conditions. The implementation of monocrystalline n-type cells in TOPCon technology ensures more stable performance across a wide range of conditions and improved resistance to common degradation mechanisms, facilitating sustained high production output for years. In practice, this translates to a reduced risk of underestimating energy yields and a more predictable autarky balance.

A key differentiator compared to many market offerings is the bifacial design, which harnesses reflected light from the ground - a tangible advantage for flat roofs, light membranes, façades, and ground-mounted installations. This design complements an advanced passivation and contact structure optimized for high bifaciality, along with enhanced reliability in challenging environments. This is the ideal choice for investors seeking more energy from the same surface area - in homes, businesses, and commercial projects.

Ranking

1,085 panels in the segment TOPCon 600-650 W
Metric This panel Median Position in segment Overall rank
Module efficiency 23.10% 22.80% Typical 1,617
Power density 230.7 227.7 Typical 1,704
Temperature coefficient -0.290 -0.290 Typical 2,220
Weight per kWp 53.5 53.1 Typical 7,520
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

Commercial, utility-scale, shaded-installations and hot-climate.

Notes from the database
  • Efficiency of 23.1% matches the TOPCon 600-650W median
  • At 230.7 W/m² power density, this panel generates 3.0 W/m² more per unit area than TOPCon 600-650W median (227.7 W/m²)
  • Temperature coefficient of -0.29%/°C matches the TOPCon 600-650W median
  • At 34.5 kg (1.7 kg above TOPCon 600-650W median of 32.8 kg), requires checking roof load capacity
  • Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof

Specifications

Open datasheet PDF
Nominal power (Pmax) 645 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 23.10 % Typical Segment median 22.80%
Vmpp · Impp 47.89 V · 13.47 A Operating point at max power
Voc · Isc 57.82 V · 14.10 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 34.5 kg Typical Typical · median 32.8 kg
Cells 156 · 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 · 0.042 %/°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 564 W guaranteed
Degradation 1.00 → 0.40 % First year, then annual

Datasheet charts

Open datasheet PDF

Measured curves published by Yingli in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 645 Wp appear here. The rest cover the whole series.

PANDA Linear Power Warranty PANDA Linear Power Warranty Whole series I-V / P-V Curves I-V / P-V Curves 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
Yingli YL645CF78 e/2 645 W 23.10% -0.290 34.5 kg You are here
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg Cooler, lighter, +2.1 pp
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg +35 W, lighter, +2.1 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg +30 W, lighter, +1.9 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg Cooler, lighter, +1.9 pp
WST-675BKX72-A2 675 W 25.00% -0.260 32.1 kg +30 W, cooler, +1.9 pp
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg +50 W, cooler, +1.8 pp
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg Cooler, lighter, +1.7 pp
LF630M10N-78H/BF 630 W 22.54% -0.290 34.0 kg -15 W, -0.6 pp
YL635CF78 e/2 635 W 22.70% -0.290 34.5 kg -10 W, -0.4 pp
YL640CF78 e/2 640 W 22.90% -0.290 34.5 kg -0.2 pp
YL650CF78 e/2 650 W 23.30% -0.290 34.5 kg Very close match
YL655CF78 e/2 655 W 23.40% -0.290 34.5 kg +10 W, +0.3 pp
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg +55 W, cooler, +1.9 pp
LR7-72HVHF-670M 670 W 24.80% -0.260 28.5 kg Cooler, lighter, +1.7 pp
JKM650-670N-66QL6-BDV (670W class) 670 W 24.80% -0.260 32.5 kg +25 W, cooler, +1.7 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 1838 panels of the same or similar size to this one, within ±100 mm. See them here

About the PANDA 3.0 Pro 1 series

6 answered

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

What is the maximum power output of the Yingli PANDA 3.0 Pro 1 panel?
The PANDA 3.0 Pro 1 series reaches up to 660 Wp, thanks to n-type monocrystalline TOPCon cells with efficiency exceeding 23%. This means fewer panels are needed to reach a target system size compared to conventional PERC modules, while still delivering strong energy yield per module.
How does TOPCon technology differ from standard PERC panels?
TOPCon is an n-type cell technology with an additional passivation layer that reduces recombination losses and improves performance at higher temperatures and under diffuse light. In practice, PANDA 3.0 Pro 1 panels deliver higher energy yield in early morning, evening, and overcast conditions compared to typical p-type PERC modules, with a lower annual degradation rate.
What does bifacial design mean for the PANDA 3.0 Pro 1 series, and is it worth it?
Bifacial construction allows the panel to generate power from its rear side as well, capturing light reflected off the ground or roof surface such as bright membranes, gravel, or snow. For ground-mount, flat-roof, and facade installations, this can add roughly several to a low double-digit percentage in energy yield, though the actual gain depends on mounting height and the albedo of the surface below the array.
What warranty comes with Yingli PANDA 3.0 Pro 1 panels?
The manufacturer provides a 12-year product warranty and a 30-year linear power warranty, guaranteeing at least 87.4% of rated output at the end of that period. This is standard for modern TOPCon modules and notably longer than older PERC-based series, which matters when estimating system profitability over a 25-30 year lifespan.
Are PANDA 3.0 Pro 1 panels suitable for commercial installations and solar farms?
Yes, the high power output of up to 660 Wp, large module dimensions, and bifacial design make the PANDA 3.0 Pro 1 series a strong fit for commercial, industrial, and ground-mount solar farm projects where maximizing yield per square meter of roof or land matters. Due to its size and weight, the module is best suited to flat roofs and ground mounting rather than smaller residential pitched roofs.
Is Yingli a tier-1 manufacturer, and can it be trusted for a long-term installation?
Yingli is a Chinese manufacturer with a long track record in the industry, classified as a tier-1 supplier, which indicates solid financial standing and reliable warranty backing. For investors, this reduces the risk of warranty claim issues over the product's multi-decade product and power warranty period.
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