--- title: "BYD MLBK-36 550W 550W Solar Panel - Specs & Review | ComparePV" description: "BYD MLBK-36 550W 550W solar panel. Specs: 21.29% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/byd-mlbk-36-550w" updated: 2026-09-11 --- # BYD MLBK-36 550W Strong in heat, heavy for its output 589 panels in the segment PERC 550-600 W ## Identity - **Manufacturer:** BYD - **Model:** MLBK-36 550W - **Series:** AURO / MLBK-36 (Mono Bifacial Dual Glass Module 530–555W) - **Rated power:** 550 W - **Cell technology:** PERC - **Bifacial:** yes ## How it compares Compared against segment PERC 550-600 W (589 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 550 W | 560 W | Weak - bottom 15% | | | Module efficiency | 21.29% | 21.29% | Typical | 8,708 | | Power density | 212.9 | 212.9 | Typical | 8,497 | | Temperature coefficient | -0.328 | -0.350 | Strong - top 5% | 8,526 | | Weight (kg) | 32.0 kg | 30.8 kg | Weak - bottom 25% | | | Performance warranty | 30 yrs | 27 yrs | Strong - top 25% | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.29% | 21.29% | Typical | 8,708 | | Power density | 212.9 | 212.9 | Typical | 8,497 | | Temperature coefficient | -0.328 | -0.350 | Strong - top 5% | 8,526 | | Weight per kWp | 58.2 | 52.7 | Weak - bottom 25% | 11,595 | | Performance warranty | 30 yrs | 27 yrs | Strong - top 25% | 21 | ### Strengths - **-0.328 %/°C temperature coefficient** - Top 5% of the PERC 550-600 W segment, against a median of -0.350. Ranked 8,526th in the whole database. - **30 year performance warranty** - Top 25% of the PERC 550-600 W segment, against a median of 27 yrs. ### Watch out for - **58.2 kg per kWp** - Bottom 25% of the PERC 550-600 W segment, against a median of 52.7. - **Best for:** Commercial, utility-scale and cold-climate. - **Not ideal for:** Weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 550 W - **Efficiency:** 21.29 % - **Voltage at Pmax (Vmp):** 42.49 V - **Current at Pmax (Imp):** 12.94 A - **Open-circuit voltage (Voc):** 50.32 V - **Short-circuit current (Isc):** 13.61 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.328 %/degC - **Temperature coefficient of Voc:** -0.254 %/degC - **Temperature coefficient of Isc:** 0.041 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 144 - **Bifacial:** yes - **Bifacial gain:** 25.00 ### Physical - **Length:** 2278 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 32.0 kg - **Area:** 2.58 m2 - **Power density:** 212.9 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 83.5 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.50 % - **Output after 30 years:** 459 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 8708 of 14005 | | Power density | 8497 of 14005 | | Temperature coefficient | 8526 of 14005 | | Weight | 11595 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Dual-Glass Construction** - Glass-on-glass design eliminates the EVA degradation, delamination risk, and accelerated laminate aging associated with standard polymer backsheets. Dual-glass modules statistically exhibit lower rates of micro-cracking under cyclic mechanical loading per IEC 61215, directly translating into more durable performance well beyond the nominal 30-year service life. - **Bifacial Design – Real-World Albedo Gain** - The rear surface generates an additional 5–25% of energy depending on ground albedo (white TPO membrane ~25%, light gravel ~15%, concrete ~10%). The effect is most pronounced in ground-mount installations, flat roofs with light-colored membranes, and tracker-based systems — precisely the configurations for which this series is explicitly optimized according to the manufacturer. - **BYD – BNEF Tier 1 Manufacturer** - BYD is listed as a bankable manufacturer on the BNEF Tier 1 index. With a 30-year warranty horizon, the financial strength of the BYD Group (annual revenues exceeding USD 85 billion) provides meaningful assurance of warranty and service obligation enforceability — a critical factor in risk modeling for projects underwritten by financial institutions. - **30-Year Linear Power Warranty** - The manufacturer guarantees ≥83.5% Pnom after 30 years, exceeding the standard 25-year warranties offered by peer comparables such as ET Solar Elite PLUS and Boviet VEGA SERIES. The extended warranty horizon has a direct impact on LCOE in utility-scale projects and PV farms structured with project finance. - **Peak Series Efficiency of 21.48%** - The top-tier variant (555 Wp) achieves 21.48% efficiency, closely matching leading peer comparables — JA Solar DEEP BLUE 3.0 (21.5%) and ET Solar Elite PLUS (21.4%) — while retaining the superior environmental durability of a dual-glass construction, a rare combination in this power class. ## Cons - **PERC Variants: Tc Pmax −0.328%/°C** - The P-type PERC cells (AURO P MLBK-36) carry a higher temperature coefficient than N-type TOPCon: the BYD AURO N NLBK-36 achieves −0.30%/°C, while top N-type series from JA Solar and ET Solar fall within −0.30 to −0.32%/°C. At a module temperature of 70°C — typical during summer conditions in Poland — the 0.028 percentage-point/°C difference translates to approximately 1.4% lower hourly energy yield compared to N-type variants under identical conditions. - **End-of-Warranty Power Floor: ≥83.5% Pnom** - The ≥83.5% Pnom threshold at the end of the warranty period is notably below the ≥87% commonly guaranteed by N-type TOPCon manufacturers in the 530–555 Wp segment (e.g., JA Solar N-type series with a 0.4%/year degradation rate). For a 1 MWp installation, the 3.5 percentage-point gap represents approximately 35 kWp less guaranteed capacity in year 30 — a material consideration in P90 modeling for project finance lenders. ## About this series The BYD AURO MLBK-36 series are bifacial monocrystalline modules with a **dual glass** construction, designed for stable energy production under real-world conditions - not just in ideal sunlight. Thanks to **bidirectional energy generation**, the panel can utilize reflected light from the ground, which translates to higher efficiency, especially on light roofs, membranes, gravel, or in ground-mounted installations. Using glass on both sides improves **resistance to environmental conditions** and reduces the risk of microcracks and accelerated laminate aging, which will be appreciated by investors focused on long-term, predictable performance. The modules also stand out for their **good performance at high temperatures** and in weaker sunlight - which is important in Polish weather, where cloud cover and fog can reduce energy output. This series is ideal for PV farms, energy storage facilities, and larger commercial installations, as well as anywhere where **low lifecycle energy costs** and compatibility with modern inverters and trackers are important. ## Notable figures - At 21.3% efficiency, this panel is on par with typical \*\*PERC 550-600W\*\* modules - Power density of 212.9 W/m² matches the \*\*PERC 550-600W\*\* median - At -0.33%/°C (vs median -0.35%/°C), loses ~1% less power in hot conditions - At 32.0 kg, this panel is 1.2 kg heavier than the \*\*PERC 550-600W\*\* median (30.8 kg) - more demanding for installation crews - Bifacial design (70% factor) captures reflected light - adds 4-10% yield on ground-mount or white roof ## Questions ### What warranty does BYD offer on the AURO MLBK-36 series? BYD provides a 12-year product warranty on AURO MLBK-36 modules and a 30-year linear power output warranty, under which the panel must retain at least 83.5% of its original nominal power. This is one of the longest power warranties currently available on the market and a compelling argument when calculating the return on investment for a utility-scale PV farm or commercial installation. ### What is TOPCon technology and why was it chosen for the BYD AURO MLBK-36 panels? TOPCon (Tunnel Oxide Passivated Contact) is an N-type cell technology that reduces charge carrier recombination losses through a thin tunnel oxide passivation layer. In practice, this translates to higher efficiency — AURO MLBK-36 modules achieve between 20.52% and 21.48% — as well as improved performance at elevated temperatures and under low-irradiance conditions, both of which are particularly relevant in the Polish climate. ### Are the BYD AURO MLBK-36 panels suitable for ground-mounted installations or tracker systems? Yes, the AURO MLBK-36 series is designed primarily for utility-scale PV farms, ground-mounted installations, and single- or dual-axis tracker systems. The bifacial design (bifaciality factor 70±5%) combined with a dual-glass construction allows the modules to harvest light reflected from the ground surface — a white geomembrane, gravel, or concrete can increase energy yield by several to over ten percent compared to a conventional monofacial module. ### What are the weight and dimensions of a single BYD AURO MLBK-36 module? A single panel weighs approximately 32 kg and measures 2278 × 1134 × 30 mm. The dual-glass construction — glass on both sides instead of a rear backsheet — adds slightly more weight compared to a conventional framed module, so this parameter should be factored in at the racking and structural design stage, particularly for flat-roof installations or ground-mounted systems when selecting support profiles. ### How do the BYD AURO MLBK-36 modules perform at high temperatures during summer? The temperature coefficient of maximum power (Pmax) for this series is -0.328%/°C, which is better than that of typical PERC modules (-0.35% to -0.40%/°C). This means lower power losses on hot days — a significant advantage for installations on dark industrial rooftops or in Mediterranean climates, but also beneficial under Polish summer conditions. ### Is BYD a reliable manufacturer of the AURO MLBK-36 panels — is it Tier 1? BYD is listed on the Bloomberg NEF Tier 1 module manufacturer ranking, which confirms its financial capacity to honor long-term warranty obligations. The company is one of the world's largest producers of both battery storage systems and PV modules, and its diversification across energy storage and electric vehicles significantly reduces the risk of insolvency over the 30-year power warranty period. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/byd-mlbk-36-da0e2563660f.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | Cooler, lighter, +3.7 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | Cooler, lighter, +3.5 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | Cooler, lighter, +3.4 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | Cooler, lighter, +3.3 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | Cooler, lighter, +3.2 pp | | [BYD NLBK-24-380](https://comparepv.com/panel/byd-nlbk-24-380) | 380 W | -170 W, cooler, -6.6 pp | | [BYD NLBK-24-385](https://comparepv.com/panel/byd-nlbk-24-385) | 385 W | -165 W, cooler, -6.4 pp | | [BYD NLBK-24-390](https://comparepv.com/panel/byd-nlbk-24-390) | 390 W | -160 W, cooler, -6.2 pp | | [BYD NLBK-24-395](https://comparepv.com/panel/byd-nlbk-24-395) | 395 W | -155 W, cooler, -6.0 pp | | [BYD NLBK-24-400](https://comparepv.com/panel/byd-nlbk-24-400) | 400 W | -150 W, cooler, -5.8 pp | | [BYD MLTK-36 530W](https://comparepv.com/panel/byd-mltk-36-530w) | 530 W | Lighter, -0.8 pp, -5 yr warranty | | [BYD MLTK-36 535W](https://comparepv.com/panel/byd-mltk-36-535w) | 535 W | Lighter, -0.6 pp, -5 yr warranty | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +100 W, cooler, +3.9 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +95 W, cooler, +3.7 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | +90 W, cooler, +3.5 pp | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | +85 W, cooler, +3.3 pp | --- Source: https://comparepv.com/panel/byd-mlbk-36-550w Not in this file, on the page: a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.