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BYD NLBK-24-385
BYD Brand review

NLBK-24-385

385 Wp TOPCon Bifacial 80%
ComparePV verdict

Middle of its segment, modest efficiency

Rank 13,336 of 14,005
Compare panels Datasheet PDF
Power (Wp)
385
Typical for its class
Efficiency (%)
14.90
Weak · bottom 19%
Density (Wp/m²)
149.0
Weak · bottom 19%
Temp (%/°C)
-0.300
Typical · median -0.290
Weight (kg)
30.0
Typical · median 26.0 kg
Warranty (yrs)
30
Typical · median 30 yrs

The BYD AURO N-Type TOPCon Bifacial Module (NLBK-24) series is designed for installations where not only energy yield but also performance in demanding conditions are important. These modules are based on N-Type TOPCon solar cells, which ensure stable energy production over the long term and high resistance to typical degradation mechanisms. A key advantage of the NLBK-24 is its bifacial design - the panel can also utilize reflected light from the ground, which helps improve annual energy yield without increasing the installation area. This works well on bright roofs, with racking systems on flat roofs, and in ground-mounted systems.

Another distinguishing feature of this series is controlled light transmission, which makes the module suitable for applications where partial illumination is required (e.g., awnings, carports). The use of SMBB technology supports better current collection and reduces losses due to shading, while PID resistance ensures reliable operation in installations exposed to harsh electrical conditions.

Ranking

112 panels in the segment TOPCon 350-400 W
Metric This panel Median Position in segment Overall rank
Module efficiency 14.90% 18.20% Weak · bottom 19% 13,820
Power density 149.0 181.8 Weak · bottom 19% 13,806
Temperature coefficient -0.300 -0.290 Typical 6,093
Weight per kWp 77.9 68.9 Typical 13,686
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

5 positive · 4 caution
Best for

Residential, commercial and shaded-installations.

Not ideal for

Tight roof space and roofs where every square metre has to count.

Watch-outs
14.90% module efficiency

Bottom 19% of the TOPCon 350-400 W segment, against a median of 18.20%.

149.0 watts per square metre

Bottom 19% of the TOPCon 350-400 W segment, against a median of 181.8.

What owners get
N-Type TOPCon – Low Temperature Coefficient

The power temperature coefficient is -0.30%/°C, outperforming typical PERC modules (-0.35 to -0.40%/°C). On hot days (e.g., cell temperature of 60°C), power loss is approximately 10.5% versus 13–15% for PERC — a tangible gain in real-world summer energy yield.

30-Year Linear Power Warranty

The manufacturer guarantees a maximum annual degradation of 0.50% over 30 years. Leading Tier-1 manufacturers (Jinko, JA Solar, Trina) standardly offer 25-year warranties — the NLBK-24 exceeds them by 5 years, a meaningful advantage for projects subject to bank financing requirements.

Light Transmittance 5–40% (BIPV)

Controlled light transmittance makes this series one of the few TOPCon module lines suitable for direct BIPV applications: carports, pergolas, and glazed atrium roofs. This unlocks a market segment inaccessible to standard opaque modules.

PID Resistance and SMBB Technology

Cells with a certified PID resistance guarantee protect systems operating at high DC system voltages (up to 1500 V DC). Super Multi Busbar (SMBB) technology reduces losses under micro-shading conditions and improves current collection across all cells.

BNEF Tier-1 Manufacturer – Bankability

BYD (founded 1995, headquartered in China) appears on the BNEF Tier-1 list, evidencing documented financing by independent commercial banks for projects exceeding 10 MW. This reduces credit and insurance risk for both investors and installers.

Trade-offs
Module Efficiency 14.71–15.48% – Below Peer Comparables

Module efficiency is significantly lower than the referenced benchmark products: Meyer Burger White at 21.7% and Solaria PowerXT at 20.2%. Even the DMEGC GH400M10T-B48HST achieves 15.48%, matching only the upper bound of the NLBK-24. This is inherent to the semi-transparent construction; however, for a standard rooftop installation it means requiring approximately 30–35% more surface area to achieve the same energy yield as fully opaque TOPCon modules.

12-Year Product Warranty – Below Market Leaders

The 12-year materials and workmanship warranty is notably shorter than Maxeon's 40-year offering and the 25-year standard provided by Jinko Solar, JA Solar, and Trina Solar. For projects involving long-term bank financing or lease structures, this may present a barrier during underwriting negotiations with insurers.

Notes from the database
  • Module efficiency of 14.9% is 1.1pp below average for TOPCon 0-400W panels (median: 16.0%)
  • At 149.0 W/m², this panel generates 10.8 W/m² less per unit area than TOPCon 0-400W median (159.8 W/m²)
  • Temperature coefficient of -0.30%/°C matches the TOPCon 0-400W median
  • At 30.0 kg, this panel is 6.5 kg heavier than the TOPCon 0-400W median (23.5 kg) - more demanding for installation crews
  • Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface

Specifications

Open datasheet PDF
Nominal power (Pmax) 385 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 14.90 % Weak Segment median 18.20%
Vmpp · Impp 28.19 V · 13.66 A Operating point at max power
Voc · Isc 33.97 V · 14.43 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2278×1134×30 mm · 2.58 m² of roof
Weight 30.0 kg Typical Typical · median 26.0 kg
Cells 96 · TOPCon Monocrystalline
Bifaciality 80 % Rear output as a share of front
Coefficient Pmax -0.300 %/°C Typical median -0.290 of its segment
Coefficient Voc · Isc -0.250 · 0.046 %/°C
NOCT 45 °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 %
Degradation 1.00 → -0.40 % 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
-0.300 %/°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.

Alternatives

All BYD panels
Filter these
Size
Panel Power Eff. Temp. Weight Difference
BYD NLBK-24-385 385 W 14.90% -0.300 30.0 kg You are here
GKA210M340W 340 W 23.00% - 16.2 kg -45 W, lighter, +8.1 pp
GKA210M360W 360 W 23.00% - 16.2 kg -25 W, lighter, +8.1 pp
GKA210M380W (1/4*4*38) 380 W 23.00% - 17.1 kg Lighter, +8.1 pp
GKA210M400W (1/2*4*20) 400 W 23.00% - 18.0 kg +15 W, lighter, +8.1 pp
GKA210M400W (1/4*4*40) 400 W 23.00% - 18.0 kg +15 W, lighter, +8.1 pp
GKA210M380W (1/2*4*19) 380 W 23.00% - 17.1 kg Lighter, +8.1 pp
LX-435M/182-108+ GG 435 W 22.81% -0.240 23.6 kg Cooler, lighter, +7.9 pp
JT435SYk(B) 435 W 22.70% -0.240 23.0 kg Cooler, lighter, +7.8 pp
SPR-MAX3-430-R 430 W 22.70% -0.270 21.2 kg Lighter, +7.8 pp, +10 yr warranty
LX-435M/182-108+ 435 W 22.61% -0.300 21.5 kg +50 W, lighter, +7.7 pp
NLBK-24-380 380 W 14.71% -0.300 30.0 kg Very close match
NLBK-24-390 390 W 15.10% -0.300 30.0 kg Very close match
NLBK-24-395 395 W 15.29% -0.300 30.0 kg +10 W, +0.4 pp
NLBK-24-400 400 W 15.48% -0.300 30.0 kg +15 W, +0.6 pp
MLTK-36 530W 530 W 20.52% -0.332 27.0 kg +145 W, +5.6 pp, -5 yr warranty
MLTK-36 535W 535 W 20.71% -0.332 27.0 kg +150 W, +5.8 pp, -5 yr warranty
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg +265 W, cooler, +10.3 pp

Found 2326 panels of the same or similar size to this one, within ±10 mm. See them here Found 2368 panels of the same or similar size to this one, within ±25 mm. See them here Found 2382 panels of the same or similar size to this one, within ±50 mm. See them here Found 2547 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
What warranty does BYD offer on the AURO NLBK-24 series panels?
BYD provides a 12-year product warranty (covering defects in workmanship and materials) and a 30-year linear power output warranty for the AURO NLBK-24 series. This means the manufacturer guarantees that module efficiency will remain above the declared threshold for three decades. By current market standards, this is a solid offering — particularly given that BYD is a recognized Tier 1 manufacturer.
What does the bifacial design of the BYD AURO NLBK-24 panels involve, and does it genuinely increase energy yield?
The NLBK-24 modules feature an active surface on both sides of the panel. The rear side captures light reflected from the roof, ground, or other bright surfaces, which can increase annual energy yield by several to over ten percent compared to conventional monofacial modules. The bifacial gain is most pronounced on white ballasted rooftops, light-colored gravel substrates, or ground-mounted systems with highly reflective ground surfaces.
How does N-Type TOPCon cell technology differ from older PERC cells?
The N-Type TOPCon cells used in the NLBK-24 feature a lower temperature coefficient (approximately -0.30%/°C), meaning they experience smaller power losses on hot days compared to typical PERC cells. They also exhibit significantly higher resistance to LID (light-induced degradation), resulting in more stable energy yield over the entire service life of the module. Module efficiency reaches 22.79%, placing it well above the performance range of conventional PERC panels.
Are the BYD AURO NLBK-24 panels suitable for carport or terrace canopy applications?
Yes. The NLBK-24 series is one of the few options available with adjustable light transmittance in the range of 5–40%, making it well suited for shaded carports, garage canopies, and terrace overhangs. The modules allow partial transmission of natural light into the covered space while continuing to generate electricity. It is advisable to confirm the exact transmittance level required for a specific project with the installer prior to procurement.
What is the rated power output of a single BYD AURO NLBK-24 panel, and how many panels are needed for a residential installation?
A single NLBK-24 module has a peak power output of 400 Wp. For a typical residential system rated at 6–10 kWp, between 15 and 25 modules are required. The exact number depends on available roof area, orientation, tilt angle, and projected energy consumption. We recommend obtaining a quote from a certified installer who can size the array based on the actual consumption profile of the property.
Do the BYD AURO NLBK-24 panels perform well in overcast conditions or during cold winter months?
Yes. N-Type TOPCon technology translates into superior performance under diffuse irradiance conditions — including overcast skies, fog, and smog — which is particularly relevant in the Polish climate for a significant portion of the year. The low temperature coefficient also means that cold, sunny winter days can yield surprisingly strong output. In addition, the modules' PID (potential-induced degradation) resistance protects against performance loss in the high-humidity conditions characteristic of Polish autumn and spring seasons.
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