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BYD MLTK-36-550
BYD Brand review

MLTK-36-550

550 Wp PERC Bifacial 70%
ComparePV verdict

Strong in heat, short guarantee

Rank 7,994 of 14,005
Compare panels Datasheet PDF
Power (Wp)
550
Weak · bottom 15%
Efficiency (%)
21.29
Typical · median 21.29%
Density (Wp/m²)
212.9
Typical · median 212.9
Temp (%/°C)
-0.332
Strong · top 10%
Weight (kg)
27.0
Strong · 3.8 kg below median
Warranty (yrs)
25
Weak · bottom 24%

The BYD AURO MLTK-36 series introduces a new level of quality in power density thanks to the use of p-type cell technology in the modern M10 format. This solution effectively eliminates the problem of limited installation space, allowing for a significantly higher energy yield from every square meter of the roof. Engineers focused on minimizing resistive losses through an advanced multi-busbar system, which translates into more stable module operation even on hot days. Thanks to the precise half-cut design, these panels handle partial shading exceptionally well, which is a key advantage in dense building environments. This series is dedicated to users seeking the highest durability, guaranteed by outstanding resistance to PID degradation and a construction that withstands extreme snow loads. Compared to the competition, BYD AURO MLTK-36 stands out for its attention to the optimization of the internal connection system, thereby offering an excellent temperature coefficient. It is an ideal choice for investors who value a fast return on investment and a reliable source of clean energy for decades, as confirmed by rigorous quality tests.

Ranking

589 panels in the segment PERC 550-600 W
Metric This panel Median Position in segment Overall rank
Module efficiency 21.29% 21.29% Typical 8,708
Power density 212.9 212.9 Typical 8,497
Temperature coefficient -0.332 -0.350 Strong · top 10% 8,735
Weight per kWp 49.1 52.7 Strong · top 13% 2,721
Performance warranty 25 yrs 27 yrs Weak · bottom 24% 9,798
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

7 positive · 2 caution
Best for

Commercial, utility-scale, shaded-installations and cold-climate.

Not ideal for

Owners who want a long output guarantee.

Strengths
-0.332 %/°C temperature coefficient

Top 10% of the PERC 550-600 W segment, against a median of -0.350.

49.1 kg per kWp

Top 13% of the PERC 550-600 W segment, against a median of 52.7.

Watch-outs
25 year performance warranty

Bottom 24% of the PERC 550-600 W segment, against a median of 27 yrs.

What owners get
Max. efficiency of 21.48% — top of segment

A peak efficiency of 21.48% places the series just behind the JA Solar DEEP BLUE 3.0 (21.5%) and clearly above the ET Solar Elite PLUS (21.4%) and Boviet VEGA (21.3%). This translates to higher energy yield from limited roof space with no price premium for newer N-type technology.

Favorable temperature coefficient

The datasheet (v202408A, BYD) specifies a Pmax TC of -0.332%/°C, which outperforms the -0.35%/°C of the JA Solar DEEP BLUE 3.0 in the same segment class. The 0.018 percentage-point difference equates to approximately 0.9 W/kWp less power loss at a typical summer module operating temperature of +75°C.

Bifacial design — up to 30% rear-side yield gain

According to the manufacturer's datasheet, the bifacial construction enables up to 30% additional energy harvest from reflected irradiance. This is particularly valuable in ground-mounted systems over high-albedo surfaces (sand, concrete, snow) or rooftops with TPO/PVC membranes.

Mechanical load rating of 5,400 Pa (front)

A front-side snow and wind load rating of 5,400 Pa corresponds to approximately 550 kg/m², more than twice the minimum IEC 61215 requirement of 2,400 Pa. The series is recommended for installations in snow load zones III–IV per PN-EN 1991-1-3.

BNEF Tier-1 manufacturer — investment bankability

BYD appears on the BNEF Tier 1 list (methodology updated March 2026), satisfying the requirement of having a minimum of 6 projects >10 MW financed by independent commercial banks. This status is critical for securing bank financing or leasing arrangements for commercial and utility-scale installations.

Trade-offs
PERC technology instead of N-type TOPCon

The series is based on p-type PERC cells, which exhibit a higher light-induced degradation (LID) rate compared to N-type TOPCon. The market is shifting en masse toward TOPCon in this power class: for example, the JA Solar DEEP BLUE 4.0 Pro (N-type TOPCon, up to 22.4% efficiency, TC = -0.30%/°C) is entering the same price segment in 2025–2026, offering superior linear degradation performance and lower temperature losses.

Notes from the database
  • Efficiency of 21.3% matches the PERC 550-600W median
  • Power density of 212.9 W/m² matches the PERC 550-600W median
  • At -0.33%/°C, hot weather performance is typical for PERC 550-600W panels
  • Weight of 27.0 kg (3.8 kg below PERC 550-600W median of 30.8 kg) allows easier transport and roof mounting
  • Bifacial design (70% factor) captures reflected light - adds 4-10% yield on ground-mount or white roof

Specifications

Open datasheet PDF
Nominal power (Pmax) 550 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.29 % Typical Segment median 21.29%
Vmpp · Impp 42.49 V · 12.94 A Operating point at max power
Voc · Isc 50.32 V · 13.61 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2278×1134×35 mm · 2.58 m² of roof
Weight 27.0 kg Strong Strong · 3.8 kg below median
Cells 144 · PERC Monocrystalline
Bifaciality 70 % Rear output as a share of front
Coefficient Pmax -0.332 %/°C Strong top 10% of its segment
Coefficient Voc · Isc -0.252 · 0.046 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 25 years Weak bottom 24% · median 27 yrs
End-of-warranty output 84.8 % Equals 451 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
-
With bifacial gain
-

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

Heat losses
-0.332 %/°C against a segment median of -0.350
-
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 MLTK-36-550 550 W 21.29% -0.332 27.0 kg You are here
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg Cooler, +3.7 pp, +5 yr warranty
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg Cooler, +3.5 pp, +5 yr warranty
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg Cooler, +3.4 pp, +5 yr warranty
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg Cooler, +3.3 pp, +5 yr warranty
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg -50 W, cooler, +3.2 pp
NLBK-24-380 380 W 14.71% -0.300 30.0 kg -170 W, -6.6 pp, +5 yr warranty
NLBK-24-385 385 W 14.90% -0.300 30.0 kg -165 W, -6.4 pp, +5 yr warranty
NLBK-24-390 390 W 15.10% -0.300 30.0 kg -160 W, -6.2 pp, +5 yr warranty
NLBK-24-395 395 W 15.29% -0.300 30.0 kg -155 W, -6.0 pp, +5 yr warranty
NLBK-24-400 400 W 15.48% -0.300 30.0 kg -150 W, -5.8 pp, +5 yr warranty
MLTK-36 530W 530 W 20.52% -0.332 27.0 kg -20 W, -0.8 pp
MLTK-36 535W 535 W 20.71% -0.332 27.0 kg -15 W, -0.6 pp
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg +100 W, cooler, +3.9 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg +95 W, cooler, +3.7 pp
AIKO-A640-MAE72Mw 640 W 24.80% -0.260 27.0 kg +90 W, cooler, +3.5 pp
AIKO-A635-MAE72Mw 635 W 24.60% -0.260 27.0 kg +85 W, cooler, +3.3 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
Are the BYD AURO MLTK-36 panels bifacial, and what does that mean in practice?
Yes, the BYD AURO MLTK-36 series consists of bifacial modules. This means the rear surface of the panel absorbs light reflected from the ground or mounting surface — such as a light-colored roofing membrane, gravel, or snow. Under favorable conditions, the rear-side gain can reach 20–30% compared to a monofacial module, effectively increasing annual energy yield without requiring additional roof area.
What warranty does the BYD AURO MLTK-36 series carry?
BYD provides a 12-year product warranty on the AURO MLTK-36 series, covering material defects and workmanship. This is complemented by a 25-year linear power output warranty — the manufacturer guarantees that after 25 years of operation the panel will retain at least 84.8% of its nominal power. First-year degradation does not exceed 2%, with a maximum annual degradation of 0.55% in subsequent years.
Do the BYD AURO MLTK-36 panels perform well under partial shading, for example from a chimney?
Yes. The MLTK-36 series employs half-cut cell technology, in which 144 cells are bisected. As a result, shading on part of the module limits losses only in the shaded area rather than across the entire string. In addition, the multi-busbar system minimizes internal resistance, so an installation on a roof with a chimney, dormers, or an antenna performs more efficiently than conventional 72-cell modules would under the same conditions.
How large and heavy are the BYD AURO MLTK-36 panels — will they fit on a typical gable roof?
The BYD AURO MLTK-36 (555 Wp) measures 2278 × 1134 × 35 mm and weighs approximately 27 kg. This is standard for M10-format modules at this power class. On a typical gable roof with a usable surface of 30–40 m², approximately 10–12 modules can be installed, yielding a system in the 5–6 kWp range. Before purchasing, it is advisable to have the installer conduct a roof audit, especially if the roof surface has an irregular shape.
Does the BYD AURO MLTK-36 series perform well during Polish winters and overcast weather?
The MLTK-36 panels operate across a temperature range of −40 °C to +85 °C, so Polish winters pose no risk to the modules whatsoever. PERC technology improves sensitivity to diffuse irradiance, which is characteristic of overcast days. The favorable temperature coefficient of Pmax at −0.332%/°C also means that on hot summer days the module loses less power than older cell designs.
Is BYD a reliable panel manufacturer, and is the AURO MLTK-36 series still available?
BYD (Build Your Dreams) is a Chinese corporation listed on Bloomberg NEF's Tier 1 ranking and one of the world's largest manufacturers of photovoltaic cells and modules. The company holds IEC 61215, IEC 61730, and TÜV certifications, and its products are available in Poland through authorized distributors. The AURO MLTK-36 series is an active product line and remains available for purchase.
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