Skip to main content
BYD NLBK-39 630
BYD Brand review

NLBK-39 630

630 Wp TOPCon Bifacial 80%
ComparePV verdict

Middle of its segment, weak in heat

Rank 2,684 of 14,005
Compare panels Datasheet PDF
Power (Wp)
630
Typical for its class
Efficiency (%)
22.54
Typical · median 22.80%
Density (Wp/m²)
225.4
Typical · median 227.7
Temp (%/°C)
-0.300
Weak · bottom 19%
Weight (kg)
34.0
Typical · median 32.7 kg
Warranty (yrs)
30
Typical · median 30 yrs

The BYD AURON NLBK-39 (625-650W) series is designed to maximize energy yield from the same roof or ground area, especially in situations where every square meter counts. These modules are based on N-type TOPCon cells, which are known for their stable performance over long periods and excellent initial degradation resistance - ensuring that the installation maintains high productivity for longer.

In practice, you gain more energy not only in full sunlight. High efficiency in low-light conditions allows for effective operation in typical Polish weather - under cloudy skies, fog, and during transitional periods. Furthermore, the use of SMBB (multi-busbar architecture) reduces losses and improves power generation, which is also beneficial in partially shaded conditions.

This series also features a bifacial design, making it suitable for ground-mounted installations, bright roofs, and anywhere where the ground reflects light. The series targets investors who want to reduce energy costs over time, rather than just achieve a good result during installation.

Ranking

1,086 panels in the segment TOPCon 600-650 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.54% 22.80% Typical 3,920
Power density 225.4 227.7 Typical 3,907
Temperature coefficient -0.300 -0.290 Weak · bottom 19% 6,093
Weight per kWp 54.0 53.1 Typical 8,163
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 · 2 caution
Best for

Commercial, utility-scale and shaded-installations.

Not ideal for

Hot climates.

Watch-outs
-0.300 %/°C temperature coefficient

Bottom 19% of the TOPCon 600-650 W segment, against a median of -0.290.

What owners get
Zero LID and Low Annual Degradation

N-type TOPCon cells exhibit zero light-induced degradation (LID), and annual power loss from year 2 onward is ≤0.55% — BYD guarantees retention of more than 84.8% of rated power after 25 years. By comparison, typical P-type PERC modules degrade at 0.55–0.70%/year while also suffering LID of 1–2% in the first year.

30-Year Linear Power Warranty

The manufacturer offers a 30-year linear power warranty, 5 years longer than the standard 25-year warranties offered by most Tier-1 manufacturers in the 625–650 W class. The product warranty stands at 12 years, which is typical for the premium segment.

Favorable Temperature Coefficient

The temperature coefficient of Pmax is -0.30%/°C, a clear improvement over the -0.34–0.35%/°C of P-type PERC modules. At a cell temperature of 65°C — a typical summer day in Poland — this difference translates to approximately 1.5–2% higher energy yield compared to older technology.

Bifacial Design — Additional Yield from the Rear Side

The bifacial construction enables 5–30% additional energy harvest from the module's rear surface, depending on ground albedo (gravel, light-colored concrete, snow). This is especially advantageous in ground-mounted systems and flat-roof installations with light-colored membranes, where albedo exceeds 0.2.

BYD — Bankable Tier-1 Manufacturer

BYD is listed among BNEF's Tier-1 bankable manufacturers, which significantly facilitates financing for commercial projects and utility-scale PV plants and reinforces confidence in the long-term warranty. The company has been in operation since 1995 and maintains a strong financial position as a global leader in batteries and EVs.

Trade-offs
Lower Efficiency Than Jinko Tiger Neo

The maximum module efficiency of the NLBK-39 is 23.25%, while direct competitor Jinko Solar Tiger Neo 66HL4M-BDX achieves 24.06% (+0.81 pp) in the same 650 W power class. On a 20-module installation, this difference amounts to approximately 100–130 Wp less total capacity for the same roof area.

Notes from the database
  • At 22.5% efficiency, this panel is on par with typical TOPCon 600-650W modules
  • Power density of 225.4 W/m² matches the TOPCon 600-650W median
  • At -0.30%/°C, hot weather performance is typical for TOPCon 600-650W panels
  • At 34.0 kg, this panel is 1.3 kg heavier than the TOPCon 600-650W median (32.7 kg) - more demanding for installation crews
  • Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof

Specifications

Open datasheet PDF
Nominal power (Pmax) 630 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.54 % Typical Segment median 22.80%
Vmpp · Impp 45.99 V · 13.70 A Operating point at max power
Voc · Isc 55.13 V · 14.33 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2465×1134×30 mm · 2.80 m² of roof
Weight 34.0 kg Typical Typical · median 32.7 kg
Cells 156 · TOPCon Monocrystalline
Bifaciality 80 % Rear output as a share of front
Coefficient Pmax -0.300 %/°C Weak bottom 19% 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 % Equals 551 W guaranteed
Degradation 0.40 % Per year after the first

Datasheet charts

Open datasheet PDF

Measured curves published by BYD in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 630 Wp appear here. The rest cover the whole series.

Linear Power Warranty Linear Power Warranty Whole series

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-39 630 630 W 22.54% -0.300 34.0 kg You are here
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg Cooler, lighter, +2.7 pp
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg +50 W, lighter, +2.7 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg +45 W, lighter, +2.5 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg Cooler, lighter, +2.5 pp
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg +40 W, lighter, +2.3 pp
LR7-72HVHF-670M 670 W 24.80% -0.260 28.5 kg +40 W, lighter, +2.3 pp
AIKO-A640-MAE72Mw 640 W 24.80% -0.260 27.0 kg Cooler, lighter, +2.3 pp
NLBK-39 625 625 W 22.35% -0.300 34.0 kg Very close match
NLBK-39 635 635 W 22.72% -0.300 34.0 kg Very close match
NLBK-39 640 640 W 22.90% -0.300 34.0 kg +10 W, +0.4 pp
NLBK-39 645 645 W 23.07% -0.300 34.0 kg +15 W, +0.5 pp
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg +70 W, cooler, +2.5 pp
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg +65 W, cooler, +2.4 pp
JKM650-670N-66QL6-BDV (670W class) 670 W 24.80% -0.260 32.5 kg +40 W, cooler, +2.3 pp

Found 616 panels of the same or similar size to this one, within ±10 mm. See them here Found 616 panels of the same or similar size to this one, within ±25 mm. See them here Found 616 panels of the same or similar size to this one, within ±50 mm. See them here Found 1813 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
What is the efficiency of the BYD AURON NLBK-39 panels, and is it a competitive result?
The BYD AURON NLBK-39 series achieves a module efficiency of 23.25%, placing it among the top-performing panels available for both residential prosumer and commercial installations. This high efficiency means that more energy is harvested per square meter of roof or ground space compared to older technologies such as PERC. N-type TOPCon cell technology is the primary driver behind this result.
Do the BYD AURON NLBK-39 650W panels perform well under overcast skies and in Polish winter conditions?
Yes. N-type TOPCon cells exhibit superior temperature resistance and excellent low-irradiance performance compared to PERC technology. For the NLBK-39 series, the power temperature coefficient is only -0.30%/°C, which limits output losses on hot days. Under typical Polish conditions — including cloud cover, fog, and short winter days — these modules operate more efficiently than previous-generation panels.
What warranty does BYD provide for the AURON NLBK-39 series?
BYD offers a 12-year product warranty covering material and workmanship defects, along with a 30-year linear power output warranty. This means the manufacturer guarantees that power output will remain above a defined threshold for three decades — one of the most extensive warranty commitments available on the market. An additional advantage is the characteristically low initial degradation of N-type TOPCon cells.
Is the BYD AURON NLBK-39 series suitable for ground-mounted installations, and what benefit does its bifaciality provide?
Yes, the NLBK-39 series is a bifacial module featuring glass on both sides, making ground-mounted installations its natural operating environment. The rear side of the panel captures light reflected from the ground surface — such as light gravel, a bright membrane, or snow — generating an additional 5–32% of energy relative to the front side alone. The brighter and more reflective the ground albedo, the greater the real-world energy gain.
Is BYD a reliable panel manufacturer, and does the AURON NLBK-39 series come from an established supplier?
BYD (Build Your Dreams) is a Chinese conglomerate ranked as a Tier 1 manufacturer according to industry benchmarks, indicating financial stability and verified production capacity. The company is one of the world's largest producers of PV cells and modules, and its products hold IEC and MCS certifications. The AURON NLBK-39 series is an active, non-discontinued product line within the manufacturer's current portfolio.
What is SMBB in the BYD AURON NLBK-39 panels, and why does it matter for partial shading performance?
SMBB (Super Multi Busbar) is a cell interconnection architecture that uses a very high number of thin busbars instead of a few wide ones. This shortens the electron path to the busbar, reduces internal resistance, and minimizes losses associated with microcracks. In practice, an SMBB module handles partial shading — from chimneys, skylights, or trees, for example — more effectively, maintaining higher output than panels built with conventional busbar architecture.
Add to compare