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WINAICO Brand review

WST-515NHX54-A4

515 Wp HJT Bifacial 90%
ComparePV verdict

Solid all-round for its segment

Rank 3,247 of 14,129
Compare panels Datasheet PDF
Power (Wp)
515
Typical for its class
Efficiency (%)
23.20
Typical · median 22.90%
Density (Wp/m²)
231.7
Typical · median 229.5
Temp (%/°C)
-0.240
Typical · median -0.240
Weight (kg)
27.4
Typical · median 27.1 kg
Warranty (yrs)
30
Typical · median 30 yrs

The WST-NHX54-A4 series comprises commercial photovoltaic modules built on N-type heterojunction (HJT) cells, encapsulated in a durable glass-glass construction. This monocrystalline cell architecture addresses the rapid degradation typical of older technologies - panels in this series deliver an exceptionally low first-year power loss and minimal annual degradation throughout their service life. Thanks to high bifaciality, the module efficiently captures light reflected off the ground surface, boosting energy yield without expanding the installation footprint, making it an attractive option for investors calculating energy costs over a multi-year cycle. The series also stands out for its PID and LID resistance and favorable temperature coefficient, maintaining stable output even under intense sunlight and the high rooftop temperatures common on commercial and industrial buildings in summer. This solution is aimed primarily at investors and installers of business-class rooftop and ground-mount projects who expect a long-term linear warranty, reliability backed by quality certifications, and a technological edge over competing PERC or TOPCon panels in a comparable price segment.

Ranking

43 panels in the segment HJT 500-550 W
Metric This panel Median Position in segment Overall rank
Module efficiency 23.20% 22.90% Typical 1,349
Power density 231.7 229.5 Typical 1,491
Temperature coefficient -0.240 -0.240 Typical 13
Weight per kWp 53.2 53.1 Typical 7,109
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.

Notes from the database
  • At 23.2% efficiency, this panel is on par with typical HJT 500-550W modules
  • At 231.7 W/m² power density, roof space requirements are typical for HJT 500-550W panels
  • At -0.24%/°C, hot weather performance is typical for HJT 500-550W panels
  • Bifaciality factor of 90% can add 4-14% extra yield with reflective mounting surface
  • #1349 for efficiency, #13 for temperature performance out of 14129 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 515 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 23.20 % Typical Segment median 22.90%
Vmpp · Impp 34.49 V · 14.94 A Operating point at max power
Voc · Isc 41.09 V · 15.81 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1960×1134×30 mm · 2.22 m² of roof
Weight 27.4 kg Typical Typical · median 27.1 kg
Cells 108 · HJT Monocrystalline
Bifaciality 90 % Rear output as a share of front
Coefficient Pmax -0.240 %/°C Typical median -0.240 of its segment
Coefficient Voc · Isc -0.220 · 0.040 %/°C
NOCT 44 °C At 800 W/m², 20 °C ambient
Product warranty 25 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 90.3 % Equals 465 W guaranteed
Degradation 1.00 → 0.30 % 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
-
With bifacial gain
-

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

Heat losses
-0.240 %/°C against a segment median of -0.240
-
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
WINAICO WST-515NHX54-A4 515 W 23.20% -0.240 27.4 kg You are here
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg Lighter, +1.8 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg Hotter, lighter, +1.6 pp
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg +45 W, lighter, +1.6 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg -10 W, lighter, +1.5 pp
WST-505BKX54-A2 505 W 24.70% -0.260 25.0 kg Hotter, lighter, +1.5 pp
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg +40 W, lighter, +1.4 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg -25 W, lighter, +1.3 pp
WST-510NHX54-A4 510 W 22.90% -0.240 27.4 kg -0.3 pp
WST-520NCX54-AW 520 W 23.40% -0.280 27.4 kg Hotter
WST-525NCX54-AW 525 W 23.60% -0.280 27.4 kg +10 W, hotter, +0.4 pp
LR7-60HVHL-550M 550 W 24.40% -0.260 16.3 kg +35 W, lighter, +1.2 pp
JAT60S40-540/LR 540 W 24.40% -0.260 23.5 kg +25 W, lighter, +1.2 pp
GK-5-60HG-540M 540 W 24.40% -0.260 23.3 kg +25 W, lighter, +1.2 pp
JKM545-54QL6-DV-F1-EU 545 W 24.27% -0.260 27.5 kg +30 W, hotter, +1.1 pp
LR7-60HVH-545M 545 W 24.20% -0.260 25.0 kg +30 W, lighter, +1.0 pp

Found 488 panels of the same or similar size to this one, within ±10 mm. See them here Found 508 panels of the same or similar size to this one, within ±25 mm. See them here Found 776 panels of the same or similar size to this one, within ±50 mm. See them here Found 1476 panels of the same or similar size to this one, within ±100 mm. See them here

About the WST-NHX54-A4 Series 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 WST-NHX54-A4 series?
The WST-NHX54-A4 series reaches a maximum power output of up to 515 Wp. This high performance comes from heterojunction N-type (HJT) cells, which capture solar radiation more efficiently than conventional PERC cells. For commercial and industrial projects, this translates into higher energy yield from the same roof or ground area.
How does HJT technology differ from PERC and TOPCon in WINAICO panels?
HJT (heterojunction) combines a crystalline silicon layer with amorphous silicon, resulting in lower thermal losses and reduced degradation over time compared to PERC or TOPCon. The WST-NHX54-A4 series benefits from very low first-year power loss and stable performance throughout its lifetime, which lowers LCOE over the full system life cycle.
Are WST-NHX54-A4 panels bifacial, and is it worth it?
Yes, the WST-NHX54-A4 series uses high-bifaciality cells that generate additional energy from light reflected off the ground surface, such as bright soil, gravel, or roofing membrane. In practice this means higher annual yield without increasing the installation footprint, which is especially beneficial for ground-mount projects and flat roofs with proper tilt.
What warranty covers WINAICO WST-NHX54-A4 modules?
The manufacturer provides a 25-year product warranty along with a 30-year linear power output warranty. This is one of the longer warranties available for commercial-grade panels, giving investors greater predictability on service costs and higher asset value in long-term financing models such as leasing or investment loans.
Do WST-NHX54-A4 panels perform well under high summer temperatures?
Yes, thanks to a favorable temperature coefficient along with resistance to PID and LID degradation, modules in this series maintain stable performance even under intense sunlight and the high temperatures typical of commercial and industrial rooftops in summer. The glass-glass construction also adds mechanical durability and weather resistance.
Is WINAICO a reliable manufacturer for large commercial installations?
WINAICO is a Tier 1 manufacturer headquartered in Taiwan, with over a decade of presence in the market and strong recognition in commercial and industrial segments. Tier 1 status indicates financial stability and verified manufacturing quality, which matters for investors relying on long-term warranty coverage and reliability.
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