--- title: "BYD NLBK-30-485 485W Solar Panel - Specs & Review | ComparePV" description: "BYD NLBK-30-485 485W solar panel. Specs: 22.42% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/byd-nlbk-30-485" updated: 2026-09-11 --- # BYD NLBK-30-485 Middle of its segment, weak in heat 1,089 panels in the segment TOPCon 450-500 W ## Identity - **Manufacturer:** BYD - **Model:** NLBK-30-485 - **Series:** AURO N NLBK-30 - **Rated power:** 485 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 450-500 W (1089 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 485 W | 465 W | Strong - top 20% | | | Module efficiency | 22.42% | 22.52% | Typical | 4,763 | | Power density | 224.2 | 225.2 | Typical | 4,763 | | Temperature coefficient | -0.300 | -0.290 | Weak - bottom 20% | 6,093 | | Weight (kg) | 25.2 kg | 24.0 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.42% | 22.52% | Typical | 4,763 | | Power density | 224.2 | 225.2 | Typical | 4,763 | | Temperature coefficient | -0.300 | -0.290 | Weak - bottom 20% | 6,093 | | Weight per kWp | 52.0 | 52.2 | Typical | 5,397 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **-0.300 %/°C temperature coefficient** - Bottom 20% of the TOPCon 450-500 W segment, against a median of -0.290. - **Not ideal for:** Hot climates. ## Specification ### Electrical - **Rated power (Pmax):** 485 W - **Efficiency:** 22.42 % - **Voltage at Pmax (Vmp):** 36.25 V - **Current at Pmax (Imp):** 13.38 A - **Open-circuit voltage (Voc):** 43.76 V - **Short-circuit current (Isc):** 13.93 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.300 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.046 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 120 - **Bifacial:** yes - **Bifacial gain:** 25.00 ### Physical - **Length:** 1908 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 25.2 kg - **Area:** 2.16 m2 - **Power density:** 224.2 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.4 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.40 % - **Output after 30 years:** 424 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 4763 of 14005 | | Power density | 4763 of 14005 | | Temperature coefficient | 6093 of 14005 | | Weight | 5397 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Zero LID and Low Temperature Coefficient** - N-type TOPCon cells exhibit zero light-induced degradation (Zero LID) and a temperature coefficient of -0.30%/°C — approximately 0.05 percentage points better than typical PERC modules (-0.35%/°C). In the Polish climate, where summer peaks exceed 35°C, this translates to a real-world annual energy yield gain of 1.5–2% over legacy technologies. - **Degradation \<0.4%/Year — 30-Year Linear Power Warranty** - The manufacturer guarantees less than 0.4% annual degradation over 30 years, ensuring retention of >88% of nominal power at the end of the warranty period. Direct comparable peers — Renesola RS4-470~490NX-E1 and Horay Solar — offer equivalent terms, but BYD's Tier-1 status and fully integrated vertical supply chain provide greater assurance that these commitments will be honored. - **Bifacial Design with >80% Bifaciality Ratio** - The bifacial module generates an additional 5–15% energy from the rear surface depending on ground albedo (light gravel ~25%, snow ~80%). In a typical rooftop installation with light-colored finishing elements, the energy yield premium is approximately 6–8%, directly reducing the project's LCOE. - **22.65% Efficiency — Top of the TOPCon Full Black Segment** - A peak efficiency of 22.65% positions the NLBK-30 series above the Horay Solar HS 182-120 TC Ocean (22.6%) and just below the Renesola RS4-470~490NX-E1 (22.71%). In the 470–490 W power class, the module occupies minimal roof area, which is critical for residential installations with limited available surface. - **Full BYD Vertical Integration (Tier-1 Since 1995)** - BYD manufactures its own silicon, cells, and modules within a closed supply chain, eliminating quality risks associated with outsourced cell procurement. Its BNEF-confirmed Tier-1 (bankable) status ensures access to project financing and guarantees consistent warranty support throughout the full coverage period. ## Cons - **Product Warranty of Only 12 Years** - A standard 12-year product warranty is the minimum acceptable for the premium segment. Premium Tier-1 competitors — such as the Jinko Tiger Neo and JA Solar Deep Blue 3.0 — offer 15-year workmanship warranties on comparable TOPCon models, giving the investor an additional three years of protection against manufacturing defects at no extra cost. - **Higher Operating Temperature of the Full Black Version** - The black backsheet and black frame absorb approximately 3–5°C more heat than standard modules with a silver frame and white backsheet. At a temperature coefficient of -0.30%/°C, this results in roughly 0.9–1.5% power loss during peak solar hours — a modest but measurable effect over the long-term energy balance. ## About this series The BYD AURO N NLBK-30 panel series is an advanced solution based on **N-type TOPCon** cell technology, which ensures significantly higher efficiency in challenging lighting conditions and better resistance to light-induced degradation. Thanks to the **Full Black** design, these modules combine elegance with functionality, making them an ideal choice for demanding residential users who care about modern roof aesthetics without compromising on power output. These panels effectively solve the problem of efficiency loss at high temperatures, offering an excellent temperature coefficient, which translates into stable energy yields even on hot days. The innovative cell structure minimizes the risk of micro-cracks, significantly extending the lifespan of the entire installation and increasing investment security. What sets them apart from the competition is their exceptional **mechanical durability** and manufacturing precision resulting from the manufacturer's full control over the entire module production process. The AURO N NLBK-30 series is primarily dedicated to the **premium residential sector** and buildings where high power density per square meter and an impeccable appearance count. By choosing these modules, you gain the certainty of stable operation and maximization of profits from producing your own electricity for many years. ## Notable figures - At 22.4% efficiency, this panel is on par with typical \*\*TOPCon 450-500W\*\* modules - Power density of 224.2 W/m² matches the \*\*TOPCon 450-500W\*\* median - Temperature coefficient of -0.30%/°C matches the \*\*TOPCon 450-500W\*\* median - Weight of 25.2 kg is 1.2 kg above \*\*TOPCon 450-500W\*\* median (24.0 kg) - verify structural support - Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface ## Questions ### What warranty is provided on BYD AURO N NLBK-30 panels? The BYD AURO N NLBK-30 series is covered by a two-tier warranty: a 12-year product warranty against material and workmanship defects, and a 30-year linear power output warranty. Annual power degradation is rated at less than 0.4%, meaning the module will retain significantly higher efficiency after three decades than industry standards require. As a Tier 1 manufacturer with a global service network, BYD provides genuine assurance that these commitments will be honored. ### What is TOPCon technology, and how do the AURO N NLBK-30 panels differ from older BYD modules? TOPCon (Tunnel Oxide Passivated Contact) is an N-type cell technology in which a thin silicon oxide layer reduces electron recombination losses at the cell surface. Compared to older BYD modules based on PERC technology, the AURO N NLBK-30 series achieves a module efficiency of up to 22.65% with an average cell efficiency of 25.50%. Key advantages include zero Light-Induced Degradation (Zero LID), a lower temperature coefficient of -0.30%/°C, and higher energy yields throughout the year. ### Is the BYD AURO N NLBK-30 panel suitable for pitched roof installations? Yes, the AURO N NLBK-30 series is designed primarily for residential installations, including pitched roofs. The black frame and black cells of the Full Black variant integrate seamlessly with dark roof tiles or metal roofing. The panel is bifacial; however, on a pitched roof the rear-side gain is minimal. The primary benefits are the high efficiency of the TOPCon cells and the module's mechanical resistance to snow and wind loads. ### How much power will a BYD AURO N NLBK-30 490 W panel produce on a hot summer day? The temperature coefficient of the NLBK-30 series is just -0.30%/°C, placing it among the best in its class. At a module temperature of 65°C, typical at solar noon on a hot summer day, power loss is approximately 12% rather than the 14–15% seen with older PERC technology. For a 490 Wp module, this translates to a real output of approximately 431 W under extreme heat conditions — a better result than P-type technology panels typically achieve. ### Why choose the Full Black version of the BYD AURO N NLBK-30 over a panel with a silver frame? The Full Black variant features an all-black frame, black backsheet, and dark cells, giving the installation the appearance of a uniform, elegant roof surface with no contrasting elements. This is particularly important for premium buildings where architectural aesthetics are as significant as technical specifications. The N-type TOPCon technology ensures that the increased heat absorption associated with the darker surface is effectively offset by the module's low temperature coefficient. ### Is BYD, as a Chinese manufacturer, a reliable choice when purchasing photovoltaic panels? BYD is classified as a Tier 1 manufacturer by the independent Bloomberg NEF agency, representing the highest rating for financial credibility and product quality. The company controls the entire production chain — from raw materials through cells to finished modules — which directly translates into panel consistency and longevity. The AURO N NLBK-30 series is backed by a 30-year power output warranty supported by one of the world's largest technology conglomerates. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/byd-nlbk-30-2d9951ab8619.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +25 W, cooler, +2.6 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | Cooler, lighter, +2.4 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +20 W, cooler, +2.3 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | Cooler, lighter, +2.1 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | Cooler, lighter, +2.1 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | Cooler, lighter, +2.1 pp | | [BYD NLBK-30-470W](https://comparepv.com/panel/byd-nlbk-30-470w) | 470 W | -15 W, -0.7 pp | | [BYD NLBK-30-475W](https://comparepv.com/panel/byd-nlbk-30-475w) | 475 W | -10 W, -0.5 pp | | [BYD NLBK-30-480W](https://comparepv.com/panel/byd-nlbk-30-480w) | 480 W | -0.2 pp | | [BYD NLBK-30-490W](https://comparepv.com/panel/byd-nlbk-30-490w) | 490 W | +0.2 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | +75 W, cooler, +2.4 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | +70 W, cooler, +2.2 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | +65 W, lighter, +2.0 pp | | [JA Solar JAT60S40-540/LR](https://comparepv.com/panel/ja-solar-jat60s40-540-lr) | 540 W | +55 W, cooler, +2.0 pp | | [Gokin GK-5-60HG-540M](https://comparepv.com/panel/gokin-gk-5-60hg-540m) | 540 W | +55 W, cooler, +2.0 pp | | [Jinko Solar JKM545-54QL6-DV-F1-EU](https://comparepv.com/panel/jinko-solar-jkm545-54ql6-dv-f1-eu) | 545 W | +60 W, cooler, +1.8 pp | --- Source: https://comparepv.com/panel/byd-nlbk-30-485 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.