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Yingli Brand review

LF 340P6-72

340 Wp Polycrystalline
ComparePV verdict

Middle of its segment, weak in heat

Rank 13,366 of 14,129
Compare panels Datasheet PDF
Power (Wp)
340
Weak · bottom 17%
Efficiency (%)
17.52
Weak · bottom 11%
Density (Wp/m²)
175.2
Weak · bottom 12%
Temp (%/°C)
-0.410
Weak · bottom 3%
Weight (kg)
22.0
Weak · bottom 16%
Warranty (yrs)
25
Typical · median 25 yrs

Yingli LF340P6-72 photovoltaic panels form the foundation of efficient commercial installations, combining proven technology with investment cost optimization. This series stands out with its 72-cell design, which provides higher surface efficiency compared to standard residential modules. A key advantage is excellent thermal stability, allowing for high energy yields even on hot days, which directly translates into a faster return on investment. The manufacturer has focused on reinforced mechanical resistance, enabling the modules to easily withstand extreme weather conditions such as strong winds or heavy snow. Yingli LF340P6-72 solves the problem of performance degradation over time by using technology that prevents the PID effect, guaranteeing long-term system reliability. This solution is primarily dedicated to investors building solar farms and large rooftop systems, where maximizing production per hectare or warehouse roof is essential. Compared to the competition, this series is characterized by an exceptional balance between price and component durability. The use of high-quality polycrystalline cells makes these panels less sensitive to changes in the light spectrum, allowing for efficient operation in conditions of Polish, often diffused sunlight. The robust frame design facilitates installation and ensures the rigidity of the entire structure over decades of operation.

Ranking

3,774 panels in the 240-440 W band, all technologies
Metric This panel Median Position in segment Overall rank
Module efficiency 17.52% 20.50% Weak · bottom 11% 13,443
Power density 175.2 204.8 Weak · bottom 12% 13,427
Temperature coefficient -0.410 -0.340 Weak · bottom 3% 13,862
Weight per kWp 64.7 55.0 Weak · bottom 16% 13,115
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 · 3 caution
Best for

Commercial.

Not ideal for

Hot climates, tight roof space and roofs where every square metre has to count.

Watch-outs
-0.410 %/°C temperature coefficient

Bottom 3% of the 240-440 W band, against a median of -0.340. Ranked 13,862nd in the whole database.

17.52% module efficiency

Bottom 11% of the 240-440 W band, against a median of 20.50%.

175.2 watts per square metre

Bottom 12% of the 240-440 W band, against a median of 204.8.

Notes from the database
  • Module efficiency of 17.5% is 4.3pp below average for database panels (median: 21.8%)
  • Power density of 175.2 W/m² is 42.9 W/m² below database median (218.1 W/m²) - needs more roof space
  • Temperature coefficient of -0.41%/°C is 0.11pp worse than database median (-0.30%/°C) - higher losses in summer heat
  • At 22.0 kg, this panel is 4.5 kg lighter than database median (26.5 kg) - easier handling during installation
  • #13443 for efficiency, #13862 for temperature performance out of 14129 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 340 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 17.52 % Weak Segment median 20.50%
Vmpp · Impp 38.73 V · 8.78 A Operating point at max power
Voc · Isc 45.73 V · 9.39 A Sizes the string length
Max system voltage 1000 V Longer strings than 1000 V modules
Dimensions 1956×992×35 mm · 1.94 m² of roof
Weight 22.0 kg Weak Weak · bottom 16%
Cells 72 Polycrystalline
Coefficient Pmax -0.410 %/°C Weak bottom 3% of its segment
Coefficient Voc · Isc -0.320 · 0.050 %/°C
NOCT 45 °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 80.0 % Equals 260 W guaranteed
Degradation 3.00 → 0.71 % 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
-0.410 %/°C against a segment median of -0.340
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Yingli LF 340P6-72 340 W 17.52% -0.410 22.0 kg You are here
LNSK-340M 340 W 20.08% -0.360 21.0 kg Cooler, lighter, +2.6 pp
CS3K-330P 330 W 19.90% -0.360 18.5 kg Cooler, lighter, +2.4 pp
CS3K-335MB-AG 335 W 19.90% -0.360 22.3 kg Cooler, +2.4 pp, +5 yr warranty
LNSK-335M 335 W 19.78% -0.360 21.0 kg Cooler, lighter, +2.3 pp
CS3L-365P 365 W 19.70% -0.360 21.1 kg +25 W, cooler, +2.2 pp
CS3U-390P 390 W 19.70% -0.360 22.5 kg +50 W, cooler, +2.2 pp
CS3K-325P 325 W 19.60% -0.360 18.5 kg Cooler, lighter, +2.1 pp
LF320P6-72 320 W 16.49% -0.410 22.0 kg -20 W, -1.0 pp
LF325P6-72 325 W 16.75% -0.410 22.0 kg -15 W, -0.8 pp
LF330P6-72 330 W 17.01% -0.410 22.0 kg -10 W, -0.5 pp
LF335P6-72 335 W 17.26% -0.410 22.0 kg -0.3 pp
SPR-MAX7-475 475 W 24.00% -0.270 21.1 kg Cooler, +6.5 pp, +15 yr warranty
SPR-MAX7-470 470 W 23.70% -0.270 21.1 kg Cooler, +6.2 pp, +15 yr warranty
SPR-MAX7-465 465 W 23.50% -0.270 21.1 kg Cooler, +6.0 pp, +15 yr warranty
SPR-MAX6-440 440 W 22.80% -0.290 20.9 kg Cooler, +5.3 pp, +15 yr warranty
SPR-MAX6-435 435 W 22.50% -0.290 20.9 kg Cooler, +5.0 pp, +15 yr warranty

Found 148 panels of the same or similar size to this one, within ±10 mm. See them here Found 241 panels of the same or similar size to this one, within ±25 mm. See them here Found 360 panels of the same or similar size to this one, within ±50 mm. See them here Found 565 panels of the same or similar size to this one, within ±100 mm. See them here

About the LF340P6-72 series

6 answered

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

Are Yingli LF340P6-72 panels still available for purchase?
The LF340P6-72 series has been discontinued by Yingli and replaced by newer, higher-efficiency modules. Availability is now limited to distributor stock and the secondary market. If you're expanding an existing installation built with these panels, it's worth acting quickly while remaining batches are still in stock.
What warranty comes with Yingli LF340P6-72 panels?
The manufacturer provides a 12-year product warranty covering material and workmanship defects, plus a 25-year power performance warranty, which is standard for tier-1 class panels. After 25 years, the panel should still deliver a substantial share of its original 340 Wp rated output, making it a solid long-term investment.
How does the 72-cell design of the LF340P6-72 differ from standard 60-cell panels?
A 72-cell design means a larger active surface area, allowing the module to deliver higher power output at the same cell efficiency compared to smaller formats. This layout is typical for commercial installations and solar farms, where maximizing energy yield per available roof or ground area matters more than the panel's larger dimensions and weight.
Does the Yingli LF340P6-72 perform well in Poland's climate with diffuse sunlight?
Yes, the high-quality polycrystalline cells used in this series are less sensitive to shifts in the light spectrum than monocrystalline cells, resulting in more stable energy production under the cloudy, diffuse conditions common in Poland. The panel's good thermal stability also helps maintain high yields even during hot days.
What is anti-PID technology in the LF340P6-72, and does it actually matter?
Anti-PID technology prevents potential-induced degradation, the gradual power loss caused by voltage differences between cells and the frame, which is especially common in large series-connected installations. In the LF340P6-72, this protects long-term reliability of solar farms and large rooftop systems, minimizing the risk of unplanned output loss after several years of operation.
Are Yingli LF340P6-72 panels bifacial, generating power from the rear side?
No, the LF340P6-72 series is a monofacial panel using classic polycrystalline cells that generate power only from the front side. If you're looking for extra yield from reflected light, for example on bright ground surfaces or metal roofing, consider newer bifacial series now offered by tier-1 manufacturers.
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