--- title: "WINAICO WST-515NHX54-A4 Solar Panel: Specs & Datasheet | ComparePV" description: "WINAICO WST-515NHX54-A4 solar panel. Specs: 23.20% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/winaico-wst-515nhx54-a4" image: "https://comparepv.com/og/panel/winaico-wst-515nhx54-a4.png" updated: 2026-10-23 --- # WINAICO WST-515NHX54-A4 Solid all-round for its segment 43 panels in the segment HJT 500-550 W ## Identity - **Manufacturer:** WINAICO - **Model:** WST-515NHX54-A4 - **Series:** WST-NHX54-A4 Series - **Rated power:** 515 W - **Cell technology:** HJT - **Bifacial:** yes ## How it compares Compared against segment HJT 500-550 W (43 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 515 W | 515 W | Typical | | | Module efficiency | 23.20% | 22.90% | Typical | 1,349 | | Power density | 231.7 | 229.5 | Typical | 1,491 | | Temperature coefficient | -0.240 | -0.240 | Typical | 13 | | Weight (kg) | 27.4 kg | 27.1 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 23.20% | 22.90% | Typical | 1,349 | | Power density | 231.7 | 229.5 | Typical | 1,491 | | Temperature coefficient | -0.240 | -0.240 | Typical | 13 | | Weight per kWp | 53.2 | 53.1 | Typical | 7,109 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | - **Best for:** Commercial. ## Specification ### Electrical - **Rated power (Pmax):** 515 W - **Efficiency:** 23.20 % - **Voltage at Pmax (Vmp):** 34.49 V - **Current at Pmax (Imp):** 14.94 A - **Open-circuit voltage (Voc):** 41.09 V - **Short-circuit current (Isc):** 15.81 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.240 %/degC - **Temperature coefficient of Voc:** -0.220 %/degC - **Temperature coefficient of Isc:** 0.040 %/degC - **NOCT:** 44 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** HJT - **Cell count:** 108 - **Bifacial:** yes - **Bifacial gain:** 20.00 ### Physical - **Length:** 1960 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 27.4 kg - **Area:** 2.22 m2 - **Power density:** 231.7 Wp/m2 ### Warranty and degradation - **Product warranty:** 25 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 90.3 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.30 % - **Output after 30 years:** 465 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 1349 of 14129 | | Power density | 1491 of 14129 | | Temperature coefficient | 13 of 14129 | | Weight | 7109 of 14129 | | Warranty | 21 of 14129 | ## About this series The WST-NHX54-A4 series comprises commercial photovoltaic modules built on **N-type heterojunction (HJT) cells**, encapsulated in a durable **glass-glass construction**. This monocrystalline cell architecture addresses the rapid degradation typical of older technologies - panels in this series deliver an exceptionally low first-year power loss and minimal annual degradation throughout their service life. Thanks to **high bifaciality**, the module efficiently captures light reflected off the ground surface, boosting energy yield without expanding the installation footprint, making it an attractive option for investors calculating energy costs over a multi-year cycle. The series also stands out for its **PID and LID resistance** and favorable temperature coefficient, maintaining stable output even under intense sunlight and the high rooftop temperatures common on commercial and industrial buildings in summer. This solution is aimed primarily at investors and installers of business-class rooftop and ground-mount projects who expect a long-term linear warranty, reliability backed by quality certifications, and a technological edge over competing PERC or TOPCon panels in a comparable price segment. ## Notable figures - At 23.2% efficiency, this panel is on par with typical \*\*HJT 500-550W\*\* modules - At 231.7 W/m² power density, roof space requirements are typical for \*\*HJT 500-550W\*\* panels - At -0.24%/°C, hot weather performance is typical for \*\*HJT 500-550W\*\* panels - Bifaciality factor of 90% can add 4-14% extra yield with reflective mounting surface - #1349 for efficiency, #13 for temperature performance out of 14129 panels ## Questions ### What is the maximum power output of the WST-NHX54-A4 series? The WST-NHX54-A4 series reaches a maximum power output of up to 515 Wp. This high performance comes from heterojunction N-type (HJT) cells, which capture solar radiation more efficiently than conventional PERC cells. For commercial and industrial projects, this translates into higher energy yield from the same roof or ground area. ### How does HJT technology differ from PERC and TOPCon in WINAICO panels? HJT (heterojunction) combines a crystalline silicon layer with amorphous silicon, resulting in lower thermal losses and reduced degradation over time compared to PERC or TOPCon. The WST-NHX54-A4 series benefits from very low first-year power loss and stable performance throughout its lifetime, which lowers LCOE over the full system life cycle. ### Are WST-NHX54-A4 panels bifacial, and is it worth it? Yes, the WST-NHX54-A4 series uses high-bifaciality cells that generate additional energy from light reflected off the ground surface, such as bright soil, gravel, or roofing membrane. In practice this means higher annual yield without increasing the installation footprint, which is especially beneficial for ground-mount projects and flat roofs with proper tilt. ### What warranty covers WINAICO WST-NHX54-A4 modules? The manufacturer provides a 25-year product warranty along with a 30-year linear power output warranty. This is one of the longer warranties available for commercial-grade panels, giving investors greater predictability on service costs and higher asset value in long-term financing models such as leasing or investment loans. ### Do WST-NHX54-A4 panels perform well under high summer temperatures? Yes, thanks to a favorable temperature coefficient along with resistance to PID and LID degradation, modules in this series maintain stable performance even under intense sunlight and the high temperatures typical of commercial and industrial rooftops in summer. The glass-glass construction also adds mechanical durability and weather resistance. ### Is WINAICO a reliable manufacturer for large commercial installations? WINAICO is a Tier 1 manufacturer headquartered in Taiwan, with over a decade of presence in the market and strong recognition in commercial and industrial segments. Tier 1 status indicates financial stability and verified manufacturing quality, which matters for investors relying on long-term warranty coverage and reliability. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/WINAICO_WST-515NHX54-A4_EU_1224-c9f58a84b533.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | Lighter, +1.8 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | Hotter, lighter, +1.6 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | +45 W, lighter, +1.6 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | -10 W, lighter, +1.5 pp | | [WINAICO WST-505BKX54-A2](https://comparepv.com/panel/winaico-wst-505bkx54-a2) | 505 W | Hotter, lighter, +1.5 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | +40 W, lighter, +1.4 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | -25 W, lighter, +1.3 pp | | [WINAICO WST-510NHX54-A4](https://comparepv.com/panel/winaico-wst-510nhx54-a4) | 510 W | -0.3 pp | | [WINAICO WST-520NCX54-AW](https://comparepv.com/panel/winaico-wst-520ncx54-aw) | 520 W | Hotter | | [WINAICO WST-525NCX54-AW](https://comparepv.com/panel/winaico-wst-525ncx54-aw) | 525 W | +10 W, hotter, +0.4 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | +35 W, lighter, +1.2 pp | | [JA Solar JAT60S40-540/LR](https://comparepv.com/panel/ja-solar-jat60s40-540-lr) | 540 W | +25 W, lighter, +1.2 pp | | [Gokin GK-5-60HG-540M](https://comparepv.com/panel/gokin-gk-5-60hg-540m) | 540 W | +25 W, lighter, +1.2 pp | | [Jinko Solar JKM545-54QL6-DV-F1-EU](https://comparepv.com/panel/jinko-solar-jkm545-54ql6-dv-f1-eu) | 545 W | +30 W, hotter, +1.1 pp | | [Longi Solar LR7-60HVH-545M](https://comparepv.com/panel/longi-lr7-60hvh-545m) | 545 W | +30 W, lighter, +1.0 pp | --- Source: https://comparepv.com/panel/winaico-wst-515nhx54-a4 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.