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Yingli Brand review

LF490M10-66H

490 Wp PERC
ComparePV verdict

Middle of its segment, weak in heat

Rank 10,526 of 14,129
Compare panels Datasheet PDF
Power (Wp)
490
Strong · top 15%
Efficiency (%)
20.60
Weak · bottom 24%
Density (Wp/m²)
206.4
Typical · median 208.5
Temp (%/°C)
-0.354
Weak · bottom 12%
Weight (kg)
26.5
Typical · median 24.5 kg
Warranty (yrs)
25
Typical · median 25 yrs

The Yingli LF505M10-66H series focuses on advanced N-type cell technology, which effectively eliminates the problem of light-induced degradation and guarantees stable module operation for decades. Thanks to the use of M10 standard silicon wafers and a precise half-cut design, these panels show significantly lower susceptibility to the negative effects of shading, which directly translates into higher energy yields in real-world weather conditions. What particularly distinguishes this series is its high power density, allowing for the generation of more electricity from every square meter of available surface. The LF505M10-66H series solves the dilemma between performance and durability by offering an excellent temperature coefficient, which helps the system maintain high efficiency even during extreme summer heat. This is a solution dedicated primarily to modern residential and commercial installations where a fast return on investment is key. The use of multi-busbar technology further strengthens cell resistance to micro-cracks and optimizes the flow of electrical charges. Compared to older technologies, this series offers better performance in low-light conditions, making it an unrivaled choice in the Polish climate and providing investors with maximum predictability of energy gains.

Ranking

452 panels in the segment PERC 450-500 W
Metric This panel Median Position in segment Overall rank
Module efficiency 20.60% 20.82% Weak · bottom 24% 11,172
Power density 206.4 208.5 Typical 11,107
Temperature coefficient -0.354 -0.350 Weak · bottom 12% 12,365
Weight per kWp 54.1 53.1 Typical 8,379
Performance warranty 25 yrs 25 yrs Typical 9,912
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

0 positive · 2 caution
Not ideal for

Hot climates and tight roof space.

Watch-outs
-0.354 %/°C temperature coefficient

Bottom 12% of the PERC 450-500 W segment, against a median of -0.350.

20.60% module efficiency

Bottom 24% of the PERC 450-500 W segment, against a median of 20.82%.

Notes from the database
  • At 20.6% efficiency, this panel is on par with typical PERC 450-500W modules
  • At 206.3 W/m² power density, roof space requirements are typical for PERC 450-500W panels
  • At -0.35%/°C, hot weather performance is typical for PERC 450-500W panels
  • Weight of 26.5 kg is 2.0 kg above PERC 450-500W median (24.5 kg) - verify structural support
  • Ranked #11172 out of 14129 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 490 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 20.60 % Weak Segment median 20.82%
Vmpp · Impp 38.05 V · 12.88 A Operating point at max power
Voc · Isc 45.71 V · 13.68 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2094×1134×35 mm · 2.37 m² of roof
Weight 26.5 kg Typical Typical · median 24.5 kg
Cells 132 · PERC Monocrystalline
Coefficient Pmax -0.354 %/°C Weak bottom 12% of its segment
Coefficient Voc · Isc -0.266 · 0.046 %/°C
NOCT 43 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 25 years Typical median 25 yrs · median 25 yrs
End-of-warranty output 84.8 % Equals 402 W guaranteed
Degradation 2.00 → 0.55 % 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
-

Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.

Heat losses
-0.354 %/°C against a segment median of -0.350
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Yingli LF490M10-66H 490 W 20.60% -0.354 26.5 kg You are here
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg Cooler, +4.4 pp, +5 yr warranty
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg Cooler, lighter, +4.2 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg Cooler, +4.1 pp, +5 yr warranty
WST-505BKX54-A2 505 W 24.70% -0.260 25.0 kg Cooler, +4.1 pp, +5 yr warranty
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg Cooler, lighter, +3.9 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg Cooler, +3.9 pp, +5 yr warranty
CIPRO-TN9C54M-500W 500 W 24.50% -0.260 21.4 kg Cooler, lighter, +3.9 pp
LF485M10-66H 485 W 20.40% -0.354 26.5 kg -0.2 pp
LF495M10-66H 495 W 20.80% -0.354 26.5 kg Very close match
LF500M10-66H 500 W 21.10% -0.354 26.5 kg +10 W, +0.5 pp
LF505M10-66H 505 W 21.30% -0.354 26.5 kg +15 W, +0.7 pp
GKA120N-PRO-590W 590 W 23.82% -0.300 26.7 kg +100 W, cooler, +3.2 pp
GKA120N-PRO-585W 585 W 23.62% -0.300 26.7 kg +95 W, cooler, +3.0 pp
BGO 580 580 W 23.50% -0.290 26.0 kg +90 W, cooler, +2.9 pp
GKA120N-PRO-580W 580 W 23.42% -0.300 26.7 kg +90 W, cooler, +2.8 pp

Found 405 panels of the same or similar size to this one, within ±10 mm. See them here Found 416 panels of the same or similar size to this one, within ±25 mm. See them here Found 433 panels of the same or similar size to this one, within ±50 mm. See them here Found 961 panels of the same or similar size to this one, within ±100 mm. See them here

About the LF505M10-66H series

6 answered

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

What is the actual power output of Yingli LF505M10-66H panels and how much energy can I generate?
The LF505M10-66H series reaches a maximum power of 505 Wp thanks to M10 silicon wafers and half-cut cell design, which increases power density per square meter. For a typical residential 6-8 kWp installation, this means fewer modules are needed compared to older series, reducing the required roof surface area.
What warranty comes with Yingli LF505M10-66H panels?
The manufacturer provides a 12-year product warranty covering material and workmanship defects, plus a 25-year power output warranty guaranteeing a minimum generation level throughout the panel's lifetime. This is standard for tier 1 manufacturers like Yingli and gives investors predictable returns on their PV installation.
How does PERC cell technology in the Yingli LF505M10-66H differ from standard monocrystalline cells?
PERC cells feature an additional rear passivation layer that reflects unused photons back into the cell, boosting efficiency. Combined with the half-cut and multi-busbar technology used in this series, this results in better resistance to microcracks and improved low-light performance, which matters in Poland's climate conditions.
Do Yingli LF505M10-66H panels perform well on hot days?
Yes, the LF505M10-66H series has an excellent temperature coefficient, meaning less power loss as module temperature rises above the standard 25°C. In practice, this means the system loses less energy on hot summer days compared to panels built with older technologies, maintaining high electricity output.
Is Yingli a trustworthy manufacturer, and where are LF505M10-66H panels made?
Yingli is a Chinese manufacturer classified as tier 1, indicating strong financial stability, in-house production lines, and inclusion on Bloomberg New Energy Finance's list of reputable PV module suppliers. This status translates into greater confidence in warranty enforcement compared to smaller, lesser-known brands.
Are Yingli LF505M10-66H panels bifacial?
No, the LF505M10-66H series consists of monofacial panels, meaning they generate energy only from the front side of the module. This is standard for typical rooftop installations, where a lack of reflected light from the ground means bifacial panels would offer no additional benefit.
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