--- title: "BYD NLBK-36 590 590W Solar Panel - Specs & Review | ComparePV" description: "BYD NLBK-36 590 590W solar panel. Specs: 22.84% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/byd-nlbk-36-590" updated: 2026-09-11 --- # BYD NLBK-36 590 Strong in heat, no clear weak spot 1,017 panels in the segment TOPCon 550-600 W ## Identity - **Manufacturer:** BYD - **Model:** NLBK-36 590 - **Series:** AURO N NLBK-36 (570-600W) - **Rated power:** 590 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 550-600 W (1017 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 590 W | 580 W | Strong - top 18% | | | Module efficiency | 22.84% | 22.44% | Strong - top 15% | 2,617 | | Power density | 228.4 | 224.4 | Strong - top 17% | 2,598 | | Temperature coefficient | -0.278 | -0.290 | Strong - top 1% | 1,295 | | Weight (kg) | 32.0 kg | 31.2 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.84% | 22.44% | Strong - top 15% | 2,617 | | Power density | 228.4 | 224.4 | Strong - top 17% | 2,598 | | Temperature coefficient | -0.278 | -0.290 | Strong - top 1% | 1,295 | | Weight per kWp | 54.2 | 53.8 | Typical | 8,477 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **-0.278 %/°C temperature coefficient** - Top 1% of the TOPCon 550-600 W segment, against a median of -0.290. Ranked 1,295th in the whole database. - **22.84% module efficiency** - Top 15% of the TOPCon 550-600 W segment, against a median of 22.44%. - **228.4 watts per square metre** - Top 17% of the TOPCon 550-600 W segment, against a median of 224.4. - **Best for:** Residential, commercial, utility-scale and hot-climate. ## Specification ### Electrical - **Rated power (Pmax):** 590 W - **Efficiency:** 22.84 % - **Voltage at Pmax (Vmp):** 45.04 V - **Current at Pmax (Imp):** 13.10 A - **Open-circuit voltage (Voc):** 53.92 V - **Short-circuit current (Isc):** 13.56 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.278 %/degC - **Temperature coefficient of Voc:** -0.239 %/degC - **Temperature coefficient of Isc:** 0.044 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 144 - **Bifacial:** yes ### Physical - **Length:** 2278 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 32.0 kg - **Area:** 2.58 m2 - **Power density:** 228.4 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.4 % - **Annual degradation:** 0.40 % - **Output after 30 years:** 516 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 2617 of 14005 | | Power density | 2598 of 14005 | | Temperature coefficient | 1295 of 14005 | | Weight | 8477 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Up to 23.23% Efficiency – Top of the Segment** - The best variants in the series achieve 23.23% efficiency, placing them on par with the Lexron 144 CELL HALFCUT TOPCon (23.23%) and Tongwei TWMND N-type (23.2%), and significantly above the Talesun BISTAR TP7F78M (21.5%). This translates into meaningfully higher energy yield from the same installation footprint. - **N-type TOPCon: Low Temperature Coefficient and Minimal Degradation** - The temperature coefficient of Pmax is -0.30%/°C, which is more favorable than the typical -0.35%/°C for PERC modules. The guaranteed annual degradation does not exceed 0.4%, ensuring the module retains at least 87.4% of its nominal power after 30 years — a value confirmed in the official BYD AURO N datasheet. - **~80% Bifaciality – Extra Kilowatt-Hours at No Added Cost** - The bifacial design with up to 80% bifaciality enables energy harvest from reflected irradiance off the ground surface (gravel, light-colored membrane, concrete), increasing annual yield by 5–15% depending on installation conditions. The benefit is especially significant in ground-mounted and rooftop systems with high-albedo surfaces. - **30-Year Linear Power Warranty** - BYD offers a 30-year linear power warranty (>87.4% after 30 years), while many manufacturers in this price segment cap their coverage at 25 years. This is a meaningful advantage in LCOE calculations for commercial and industrial projects planned across a full three-decade operational life. - **BNEF Tier 1 – Bankability Since 1995** - BYD is listed on the BNEF Tier 1 PV Module Manufacturers ranking (confirmed Q1 2026), meaning banks and infrastructure funds recognize the manufacturer as financially credible. This facilitates project finance and reduces counterparty risk on large-scale installations. ## Cons - **Product Warranty Limited to 12 Years** - The standard workmanship and materials warranty is 12 years, whereas JA Solar, Jinko Solar, and Trina Solar offer 25-year product warranties in comparable product classes. For installations with a planned service life of 25–30 years, this means that manufacturing defects detected after year 12 will not be covered under the manufacturer's warranty. ## About this series The BYD AURO N NLBK-36 (570-600W) series are modules designed to maximize energy yield from the same surface area - particularly in situations where every square meter of roof space or limited ground space is valuable. A key advantage is the combination of **N-type TOPCon cell technology** with a **bifacial design**, which allows for efficient operation even with reflected light and better utilization of site conditions (bright ground, gravel, roof membrane). These modules are characterized by **low temperature sensitivity**, ensuring stable production even in hot weather, as well as **long-term durability and slower degradation** - which is a significant advantage for investments planned over decades. Furthermore, a **sealed connection box with high IP protection** is used, which contributes to reliability in more challenging weather conditions. This is an excellent choice for commercial, industrial, and large residential installations, where high production, durability, and predictable returns are the top priorities. ## Notable figures - Efficiency of 22.8% matches the \*\*TOPCon 550-600W\*\* median - At 228.4 W/m² power density, this panel generates 4.0 W/m² more per unit area than \*\*TOPCon 550-600W\*\* median (224.4 W/m²) - At -0.28%/°C, hot weather performance is typical for \*\*TOPCon 550-600W\*\* panels - Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof - Ranked #2617 out of 14005 panels for efficiency in the database ## Questions ### What does TOPCon technology mean in the BYD AURO N NLBK-36 panels, and does it make a practical difference? TOPCon (Tunnel Oxide Passivated Contact) is an n-type cell technology that reduces electron recombination losses within the silicon substrate. In practice, this translates to higher module efficiency (up to 21.5%) for the same footprint and a slower rate of power degradation over time. For the system owner, this means more kilowatt-hours delivered across the full service life — a difference that becomes especially apparent when compared with older-generation PERC cells. ### What warranty does BYD offer on the AURO N NLBK-36 series? BYD provides a 12-year product warranty covering defects in materials and workmanship, along with a 30-year linear power output warranty. The power warranty guarantees that after 30 years of operation the module will retain the minimum percentage of its nominal power as specified in the datasheet. This is one of the longer warranty standards in the industry — a significant factor when calculating return on investment over multi-decade time horizons. ### Do the BYD AURO N NLBK-36 panels lose a significant amount of power on hot days? The AURO N NLBK-36 series features a power temperature coefficient of approximately -0.30%/°C, which is better than that of typical PERC modules (around -0.34 to -0.36%/°C). This means that when the module heats up to 70°C — typical during summer on a dark roof — the power loss is noticeably lower. During the hot months when energy production matters most, these modules maintain more stable output. ### Which types of installations are best suited to the BYD AURO N NLBK-36 570–600 W series? This series is primarily suited to commercial, industrial, and large residential installations where maximizing energy yield from a limited surface area is critical. With peak power reaching 600 Wp and bifacial capability — harvesting light reflected from a bright ground surface — it is also attractive for ground-mounted systems over light-colored gravel or white membranes. It is not the typical choice for small rooftops with significant shading. ### What benefit does bifaciality provide in the BYD AURO N NLBK-36 panels, and when can it be relied upon? Bifaciality means that the rear side of the panel also converts light reflected from the ground or surrounding surfaces. The production gain can range from a few percent up to 20–25% under favorable conditions: white gravel, a light-colored roofing membrane, or ground-mounted installations with clearance beneath the modules. On a dark roof with no rear-side light access, the effect is minimal. BYD specifies a bifaciality factor of up to approximately 80% of the front-side power rating. ### Is BYD a reliable manufacturer, and should I be concerned about warranty service availability in ten or more years? BYD (Build Your Dreams) is a Chinese manufacturer rated Tier 1 by Bloomberg NEF, indicating financial stability and an established position in the global market. The company is one of the world's largest producers of batteries and PV modules, with an extensive distributor network across Europe. The risk of the brand disappearing is considerably lower than with smaller manufacturers; however, as with any non-EU producer, it is worth paying attention to the local entity backing the warranty. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/nlbk-36-0175d66c35fe.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | -30 W, lighter, +2.0 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | +50 W, lighter, +2.0 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | -35 W, lighter, +1.8 pp | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | +45 W, lighter, +1.8 pp | | [AIKO AIKO-A630-MAH72Dw](https://comparepv.com/panel/aiko-aiko-a630-mah72dw) | 630 W | +40 W, cooler, +1.6 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | -40 W, 16 kg lighter, +1.6 pp | | [BYD NLBK-24-380](https://comparepv.com/panel/byd-nlbk-24-380) | 380 W | -210 W, hotter, -8.1 pp | | [BYD NLBK-24-385](https://comparepv.com/panel/byd-nlbk-24-385) | 385 W | -205 W, hotter, -7.9 pp | | [BYD NLBK-24-390](https://comparepv.com/panel/byd-nlbk-24-390) | 390 W | -200 W, hotter, -7.7 pp | | [BYD NLBK-24-395](https://comparepv.com/panel/byd-nlbk-24-395) | 395 W | -195 W, hotter, -7.6 pp | | [BYD NLBK-24-400](https://comparepv.com/panel/byd-nlbk-24-400) | 400 W | -190 W, hotter, -7.4 pp | | [BYD MLTK-36 530W](https://comparepv.com/panel/byd-mltk-36-530w) | 530 W | -60 W, hotter, -2.3 pp | | [BYD MLTK-36 535W](https://comparepv.com/panel/byd-mltk-36-535w) | 535 W | -55 W, hotter, -2.1 pp | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +60 W, lighter, +2.4 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +55 W, lighter, +2.2 pp | --- Source: https://comparepv.com/panel/byd-nlbk-36-590 Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.