--- title: "BYD MLTK-36 555W 555W Solar Panel - Specs & Review | ComparePV" description: "BYD MLTK-36 555W 555W solar panel. Specs: 21.48% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/byd-mltk-36-555w" updated: 2026-09-11 --- # BYD MLTK-36 555W Light for its output, short guarantee 589 panels in the segment PERC 550-600 W ## Identity - **Manufacturer:** BYD - **Model:** MLTK-36 555W - **Series:** AURO Mono Bifacial Half Cell Module (MLTK-36 530-555W) - **Rated power:** 555 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) | 555 W | 560 W | Typical | | | Module efficiency | 21.48% | 21.29% | Typical | 8,152 | | Power density | 214.8 | 212.9 | Strong - top 20% | 8,034 | | Temperature coefficient | -0.332 | -0.350 | Strong - top 10% | 8,735 | | Weight (kg) | 27.0 kg | 30.8 kg | Strong - top 9% | | | Performance warranty | 25 yrs | 27 yrs | Weak - bottom 24% | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.48% | 21.29% | Typical | 8,152 | | Power density | 214.8 | 212.9 | Strong - top 20% | 8,034 | | Temperature coefficient | -0.332 | -0.350 | Strong - top 10% | 8,735 | | Weight per kWp | 48.6 | 52.7 | Strong - top 9% | 2,386 | | Performance warranty | 25 yrs | 27 yrs | Weak - bottom 24% | 9,798 | ### Strengths - **48.6 kg per kWp** - Top 9% of the PERC 550-600 W segment, against a median of 52.7. Ranked 2,386th in the whole database. - **-0.332 %/°C temperature coefficient** - Top 10% of the PERC 550-600 W segment, against a median of -0.350. - **214.8 watts per square metre** - Top 20% of the PERC 550-600 W segment, against a median of 212.9. ### Watch out for - **25 year performance warranty** - Bottom 24% of the PERC 550-600 W segment, against a median of 27 yrs. - **Best for:** Commercial, utility-scale and shaded-installations. - **Not ideal for:** Owners who want a long output guarantee. ## Specification ### Electrical - **Rated power (Pmax):** 555 W - **Efficiency:** 21.48 % - **Voltage at Pmax (Vmp):** 42.71 V - **Current at Pmax (Imp):** 12.99 A - **Open-circuit voltage (Voc):** 50.62 V - **Short-circuit current (Isc):** 13.65 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.332 %/degC - **Temperature coefficient of Voc:** -0.252 %/degC - **Temperature coefficient of Isc:** 0.046 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 144 - **Bifacial:** yes ### Physical - **Length:** 2278 mm - **Width:** 1134 mm - **Thickness:** 35 mm - **Weight:** 27.0 kg - **Area:** 2.58 m2 - **Power density:** 214.8 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 84.8 % - **Annual degradation:** -0.55 % ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 8152 of 14005 | | Power density | 8034 of 14005 | | Temperature coefficient | 8735 of 14005 | | Weight | 2386 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **Bifacial with Half-Cut Cells: Dual Energy Source** - The module harvests energy from both sides via bifacial technology (bifaciality factor ~70%), while the 144 half-cut cell layout reduces resistive losses and mitigates the impact of partial shading — a meaningful advantage in utility-scale PV farms with trackers or rooftop installations with irregular shading profiles. - **Efficiency Up to 21.48% — Among the Top in the Bifacial PERC Segment** - The upper end of the efficiency range (21.48%) positions the series on par with direct peer comparables: JA Solar Deep Blue 3.0 (21.5%), ET Solar Elite PLUS (21.4%), and above Boviet VEGA (21.3%), meaning no significant power density penalty when choosing BYD over competing products in this segment. - **Temperature Coefficient of -0.332%/°C — Below the PERC Norm** - Typical PERC modules exhibit a power temperature coefficient in the range of -0.35 to -0.37%/°C. The MLTK-36 achieves -0.332%/°C, which under Polish summer conditions (module temperature 60–70°C) translates to a real-world 0.5–0.7% higher energy yield compared to lower-performing PERC modules — though still above BYD's own N-type AURO N series at -0.30%/°C. - **BNEF Tier-1 Manufacturer with a 30-Year Track Record** - BYD appears on the BNEF Tier-1 list and has been operating since 1995 as a diversified global conglomerate spanning batteries, electric vehicles, and energy storage — significantly reducing manufacturer bankruptcy risk over a 25-year power output warranty horizon, a key argument in project finance for utility-scale assets. - **1500V DC System Voltage Rated** - Certification for 1500V DC enables longer string configurations, reducing the number of inverters and the total length of DC wiring — a direct CAPEX saving in commercial and industrial installations above 100 kWp. ## Cons - **PERC: Lower Bifaciality Than TOPCon** - PERC technology limits the bifaciality factor to ~70%, while competing N-type TOPCon modules — including BYD's own AURO N series and JA Solar Deep Blue 4.0 — reach ~85%. Under high-albedo conditions (white membranes, light gravel, snow), this results in a real-world 2–4% lower annual rear-side yield, with the gap widening as the reflectivity of the ground surface improves. ## About this series The BYD AURO Mono Bifacial Half Cell Module (MLTK-36 530-555W) series are bifacial modules based on **bifacial technology** and **half-cell** technology, designed to maximize energy gains in real-world conditions. By utilizing both sides, the panel can capture reflected radiation from a bright surface, gravel, or roof membranes, resulting in higher output without expanding the installation area. The half-cell design reduces resistive losses and improves performance under partial shading, which is beneficial on roofs with obstructions or in tracker arrays. Another notable feature is **excellent performance in low light** - the series maintains a more stable output on cloudy days and in foggy conditions, and the **low temperature coefficient** helps maintain power generation in the summer, when traditional modules often lose efficiency. This makes it a good choice for solar farms, commercial and industrial installations, and projects where the total cost of energy over the entire lifespan is a key factor, rather than just initial specifications. ## Notable figures - At 21.5% efficiency, this panel is on par with typical \*\*PERC 550-600W\*\* modules - At 214.8 W/m² power density, roof space requirements are typical for \*\*PERC 550-600W\*\* panels - At -0.33%/°C, hot weather performance is typical for \*\*PERC 550-600W\*\* panels - 27.0 kg weight - 3.8 kg lighter than \*\*PERC 550-600W\*\* median (30.8 kg), reducing installation effort - Bifacial design (70% factor) captures reflected light - adds 4-10% yield on ground-mount or white roof ## Questions ### What warranty does the BYD AURO MLTK-36 series carry and what does it cover? The BYD AURO MLTK-36 series comes with a 12-year product warranty covering material and workmanship defects, along with a 25-year linear power output warranty. After 25 years, the panel is guaranteed to retain at least 84.8% of its nominal power output. As a Tier 1 manufacturer, BYD provides stable and reliable warranty claim processes — a critical consideration given the long investment horizon of a PV system. ### What advantages does bifacial technology offer in the BYD AURO MLTK-36 series, and when does it pay off? Bifacial technology enables the module to generate electricity from both the front and rear surfaces by capturing irradiance reflected from the ground or rooftop substrate. In the MLTK-36 series, the bifaciality factor is 70% (±5%), which — over a light-colored substrate such as gravel or a white roofing membrane — can translate into a several to over ten percent increase in annual energy yield. The greatest gains are achieved in ground-mounted utility-scale installations with single-axis trackers and in industrial rooftop systems with high-albedo surfaces. ### What are the dimensions and weight of the BYD AURO MLTK-36 555W panel, and will it fit on a typical roof? The module measures 2278 x 1134 x 35 mm and weighs 27 kg. This form factor is typical of modules rated above 530 Wp, which are primarily intended for commercial, industrial, and utility-scale PV installations. Residential rooftop installation is feasible but requires a robust mounting structure and a structural assessment of the roof's load-bearing capacity — at 27 kg per module, the dead load is higher than that of smaller prosumer-grade modules. ### Do the BYD AURO MLTK-36 panels perform well on hot days and in winter? The MLTK-36 series features a power temperature coefficient of -0.332%/°C, resulting in comparatively low power losses at elevated temperatures relative to older cell technologies. The operating temperature range spans from -40°C to +85°C, so Central European winters pose no operational risk. During summer, power derating caused by a heated roof surface will be lower than with modules exhibiting a higher temperature coefficient, contributing to better overall annual energy yield. ### Are the BYD AURO MLTK-36 modules suitable for large-scale PV farms and industrial installations? Yes, the MLTK-36 series is engineered specifically for the commercial and utility-scale segment. A peak power output of up to 555 Wp, compatibility with 1500 V DC system voltage, and bifacial half-cut PERC cell technology make it a product optimized for minimizing the levelized cost of energy (LCOE) in large-scale projects. Fewer modules and reduced balance-of-system (BoS) wiring costs per installed MW translate into measurable savings during farm development and construction. ### How does the BYD AURO MLTK-36 differ from standard monofacial monocrystalline panels? A standard monocrystalline module generates electricity exclusively from its front surface. The MLTK-36, thanks to its transparent rear glass and bifacial architecture, can harvest reflected irradiance from the rear side, boosting energy production without increasing the installation footprint. In addition, the half-cut cell layout reduces resistive losses and improves tolerance to partial shading. The combined result is a higher annual kilowatt-hour yield for the same roof or ground area compared to a conventional monofacial module. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/byd-mltk-36-ddaa5d5caa91.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | Cooler, +3.5 pp, +5 yr warranty | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | Cooler, +3.3 pp, +5 yr warranty | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | -50 W, cooler, +3.2 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | Cooler, +3.1 pp, +5 yr warranty | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | Cooler, lighter, +2.9 pp | | [JA Solar JAT60S40-540/LR](https://comparepv.com/panel/ja-solar-jat60s40-540-lr) | 540 W | Cooler, +2.9 pp, +5 yr warranty | | [BYD NLBK-24-380](https://comparepv.com/panel/byd-nlbk-24-380) | 380 W | -175 W, -6.8 pp, +5 yr warranty | | [BYD NLBK-24-385](https://comparepv.com/panel/byd-nlbk-24-385) | 385 W | -170 W, -6.6 pp, +5 yr warranty | | [BYD NLBK-24-390](https://comparepv.com/panel/byd-nlbk-24-390) | 390 W | -165 W, -6.4 pp, +5 yr warranty | | [BYD NLBK-24-395](https://comparepv.com/panel/byd-nlbk-24-395) | 395 W | -160 W, -6.2 pp, +5 yr warranty | | [BYD NLBK-24-400](https://comparepv.com/panel/byd-nlbk-24-400) | 400 W | -155 W, -6.0 pp, +5 yr warranty | | [BYD MLTK-36 530W](https://comparepv.com/panel/byd-mltk-36-530w) | 530 W | -25 W, -1.0 pp | | [BYD MLTK-36 535W](https://comparepv.com/panel/byd-mltk-36-535w) | 535 W | -20 W, -0.8 pp | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +95 W, cooler, +3.7 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +90 W, cooler, +3.5 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | +85 W, cooler, +3.3 pp | --- Source: https://comparepv.com/panel/byd-mltk-36-555w 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.