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Yingli Brand review

LF505M10-66H

505 Wp PERC
ComparePV verdict

Efficiency leader, weak in heat

Rank 9,601 of 14,129
Compare panels Datasheet PDF
Power (Wp)
505
Weak · bottom 11%
Efficiency (%)
21.30
Strong · top 4%
Density (Wp/m²)
212.7
Strong · top 6%
Temp (%/°C)
-0.354
Weak · bottom 13%
Weight (kg)
26.5
Typical · median 28.3 kg
Warranty (yrs)
25
Weak · bottom 22%

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

709 panels in the segment PERC 500-550 W
Metric This panel Median Position in segment Overall rank
Module efficiency 21.30% 20.90% Strong · top 4% 8,585
Power density 212.7 209.0 Strong · top 6% 8,824
Temperature coefficient -0.354 -0.350 Weak · bottom 13% 12,365
Weight per kWp 52.5 53.0 Typical 6,063
Performance warranty 25 yrs 30 yrs Weak · bottom 22% 9,912
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

2 positive · 2 caution
Best for

Small roofs that need every watt and roofs where every square metre counts.

Not ideal for

Hot climates and owners who want a long output guarantee.

Strengths
21.30% module efficiency

Top 4% of the PERC 500-550 W segment, against a median of 20.90%. Ranked 8,585th in the whole database.

212.7 watts per square metre

Top 6% of the PERC 500-550 W segment, against a median of 209.0. Ranked 8,824th in the whole database.

Watch-outs
-0.354 %/°C temperature coefficient

Bottom 13% of the PERC 500-550 W segment, against a median of -0.350.

25 year performance warranty

Bottom 22% of the PERC 500-550 W segment, against a median of 30 yrs.

Notes from the database
  • Efficiency of 21.3% matches the PERC 500-550W median
  • At 212.7 W/m² power density, this panel generates 3.7 W/m² more per unit area than PERC 500-550W median (209.0 W/m²)
  • Temperature coefficient of -0.35%/°C matches the PERC 500-550W median
  • 26.5 kg weight - 1.8 kg lighter than PERC 500-550W median (28.3 kg), reducing installation effort
  • #8585 for efficiency, #12365 for temperature performance out of 14129 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 505 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.30 % Strong Segment median 20.90%
Vmpp · Impp 38.62 V · 13.08 A Operating point at max power
Voc · Isc 46.40 V · 13.88 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 28.3 kg
Cells 132 · PERC Monocrystalline
Coefficient Pmax -0.354 %/°C Weak bottom 13% 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 Weak bottom 22% · median 30 yrs
End-of-warranty output 84.8 % Equals 414 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 LF505M10-66H 505 W 21.30% -0.354 26.5 kg You are here
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg Cooler, +3.7 pp, +5 yr warranty
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg Cooler, lighter, +3.5 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg Cooler, +3.4 pp, +5 yr warranty
WST-505BKX54-A2 505 W 24.70% -0.260 25.0 kg Cooler, +3.4 pp, +5 yr warranty
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg +50 W, cooler, +3.3 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg Cooler, lighter, +3.2 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg Cooler, +3.2 pp, +5 yr warranty
LF485M10-66H 485 W 20.40% -0.354 26.5 kg -20 W, -0.9 pp
LF490M10-66H 490 W 20.60% -0.354 26.5 kg -15 W, -0.7 pp
LF495M10-66H 495 W 20.80% -0.354 26.5 kg -10 W, -0.5 pp
LF500M10-66H 500 W 21.10% -0.354 26.5 kg Very close match
GKA120N-PRO-590W 590 W 23.82% -0.300 26.7 kg +85 W, cooler, +2.5 pp
GKA120N-PRO-585W 585 W 23.62% -0.300 26.7 kg +80 W, cooler, +2.3 pp
BGO 580 580 W 23.50% -0.290 26.0 kg +75 W, cooler, +2.2 pp
GKA120N-PRO-580W 580 W 23.42% -0.300 26.7 kg +75 W, cooler, +2.1 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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