--- title: "Silfab SIL-490 HN 490W Solar Panel - Specs & Review | ComparePV" description: "Silfab SIL-490 HN 490W solar panel. Specs: 20.90% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/silfab-sil-490-hn" updated: 2026-09-11 --- # Silfab SIL-490 HN Warranty pick, weak in heat 449 panels in the segment PERC 450-500 W ## Identity - **Manufacturer:** Silfab - **Model:** SIL-490 HN - **Series:** HN - **Rated power:** 490 W - **Cell technology:** PERC ## How it compares Compared against segment PERC 450-500 W (449 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 490 W | 460 W | Strong - top 15% | | | Module efficiency | 20.90% | 20.82% | Typical | 10,072 | | Power density | 208.8 | 208.5 | Typical | 10,277 | | Temperature coefficient | -0.360 | -0.350 | Weak - bottom 8% | 12,345 | | Weight (kg) | 25.8 kg | 24.5 kg | Typical | | | Performance warranty | 30 yrs | 25 yrs | Strong - top 20% | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.90% | 20.82% | Typical | 10,072 | | Power density | 208.8 | 208.5 | Typical | 10,277 | | Temperature coefficient | -0.360 | -0.350 | Weak - bottom 8% | 12,345 | | Weight per kWp | 52.7 | 53.1 | Typical | 6,283 | | Performance warranty | 30 yrs | 25 yrs | Strong - top 20% | 21 | ### Strengths - **30 year performance warranty** - Top 20% of the PERC 450-500 W segment, against a median of 25 yrs. ### Watch out for - **-0.360 %/°C temperature coefficient** - Bottom 8% of the PERC 450-500 W segment, against a median of -0.350. Ranked 12,345th in the whole database. - **Best for:** Residential and commercial. - **Not ideal for:** Hot climates. ## Specification ### Electrical - **Rated power (Pmax):** 490 W - **Efficiency:** 20.90 % - **Voltage at Pmax (Vmp):** 45.23 V - **Current at Pmax (Imp):** 10.83 A - **Open-circuit voltage (Voc):** 53.96 V - **Short-circuit current (Isc):** 11.36 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.360 %/degC - **Temperature coefficient of Voc:** -0.280 %/degC - **Temperature coefficient of Isc:** 0.064 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 156 ### Physical - **Length:** 2263 mm - **Width:** 1037 mm - **Thickness:** 35 mm - **Weight:** 25.8 kg - **Area:** 2.35 m2 - **Power density:** 208.8 Wp/m2 ### Warranty and degradation - **Product warranty:** 25 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 82.6 % - **First-year degradation:** 2.90 % - **Annual degradation:** 0.48 % - **Output after 30 years:** 407 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 10072 of 14005 | | Power density | 10277 of 14005 | | Temperature coefficient | 12345 of 14005 | | Weight | 6283 of 14005 | | Warranty | 21 of 14005 | ## About this series The Silfab SIL-490 HN series is a solar panel line engineered for commercial and utility-scale projects, where long-term reliability matters just as much as raw output. Built on **half-cut mono PERC cells (156 half-cells)** with 9-busbar technology, the design reduces resistive losses and improves module behavior under partial shading, a common challenge on large rooftops and ground-mount solar farms. The panels stand out with a **reinforced anodized aluminum frame** rated for heavy snow and wind loads, making them well suited to demanding climate conditions. A key advantage is their **resistance to ammonia corrosion and salt mist**, which makes them a solid choice for agricultural sites and coastal installations. The modules feature an **IP68-rated junction box** and are backed by proven manufacturing quality, having earned a Top Performer rating in PVEL's independent reliability scorecard. The HN series is covered by a **30-year linear power warranty** along with an extended product warranty, translating into a predictable and stable LCOE over the system's lifetime. This makes it a strong fit for investors and installers seeking a proven, durable panel for commercial, industrial, and utility-scale PV projects with demanding performance requirements. ## Notable figures - Efficiency of 20.9% matches the \*\*PERC 450-500W\*\* median - Power density of 208.8 W/m² matches the \*\*PERC 450-500W\*\* median - At -0.36%/°C, hot weather performance is typical for \*\*PERC 450-500W\*\* panels - Weight of 25.8 kg is 1.3 kg above \*\*PERC 450-500W\*\* median (24.5 kg) - verify structural support - #10072 for efficiency, #12345 for temperature performance out of 14005 panels ## Questions ### Is the Silfab SIL-490 HN series still available for purchase? The HN series has been discontinued from current production and replaced by newer models in Silfab's Commercial lineup. SIL-490 HN panels may still be available from distributors selling remaining warehouse stock, but for larger utility-scale projects it's worth confirming availability in advance or considering a current equivalent from the manufacturer's active range. ### What warranty comes with Silfab SIL-490 HN panels? The panels carry a 25-year product warranty and a 30-year linear power warranty, guaranteeing at least 97.1% of nominal power after the first year and no less than 82.6% after 30 years of operation. This warranty level is typical for the commercial segment and supports a predictable, stable LCOE throughout the installation's operating life. ### Are Silfab HN panels suitable for large utility-scale solar farms? Yes, the SIL-490 HN series was designed for commercial and utility-scale installations. The reinforced anodized aluminum frame withstands heavy snow and wind loads, while half-cut cell technology reduces losses under partial shading, which matters on the sprawling rooftops and ground-mount arrays typical of large PV farms. ### What are the half-cut PERC cells and 9-busbar technology in the Silfab SIL-490 HN? The panel uses 156 monocrystalline PERC half-cells, which lowers resistive losses and improves module behavior under partial shading compared to full-size cells. The additional 9-busbar design increases the number of current-collection paths, improving connection reliability and slightly boosting module efficiency, which reaches up to 20.9%. ### Are Silfab HN panels suitable for agricultural or coastal installations? Yes, the HN series has certified resistance to ammonia corrosion and salt mist, making it a suitable choice for agricultural buildings exposed to ammonia fumes as well as coastal-zone installations, where standard panels degrade faster due to frame and electrical connector corrosion. ### Is Silfab a Tier 1 manufacturer, and where are SIL-490 HN panels made? Silfab Solar is a Tier 1 manufacturer headquartered in Canada with production facilities in North America. The company has repeatedly confirmed its module quality by earning Top Performer status in the independent PVEL reliability scorecard, which builds investor confidence for commercial projects with demanding operational requirements. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/Silfab-SIL-490-HN-Data-Generic-20231221-8dde31cd5a9b.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | Cooler, lighter, +4.1 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | Cooler, lighter, +3.9 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | Cooler, lighter, +3.8 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | Cooler, lighter, +3.6 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | Cooler, lighter, +3.6 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | Cooler, lighter, +3.6 pp | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +160 W, cooler, +4.3 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +155 W, cooler, +4.1 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | +150 W, cooler, +3.9 pp | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | +145 W, cooler, +3.7 pp | | [AIKO AIKO-A630-MAH72Dw](https://comparepv.com/panel/aiko-aiko-a630-mah72dw) | 630 W | +140 W, cooler, +3.5 pp | --- Source: https://comparepv.com/panel/silfab-sil-490-hn Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.