--- title: "Silfab SIL-320 NL 320W Solar Panel - Specs & Review | ComparePV" description: "Silfab SIL-320 NL 320W solar panel. Specs: 18.80% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/silfab-sil-320-nl" updated: 2026-09-11 --- # Silfab SIL-320 NL Warranty pick, no clear weak spot 286 panels in the segment PERC 300-350 W ## Identity - **Manufacturer:** Silfab - **Model:** SIL-320 NL - **Series:** SIL-320 NL - **Rated power:** 320 W - **Cell technology:** PERC ## How it compares Compared against segment PERC 300-350 W (286 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 320 W | 325 W | Typical | | | Module efficiency | 18.80% | 19.00% | Typical | 13,033 | | Power density | 188.2 | 190.0 | Typical | 13,001 | | Temperature coefficient | -0.360 | -0.360 | Typical | 12,345 | | Weight (kg) | 18.6 kg | 19.0 kg | Typical | | | Performance warranty | 30 yrs | 25 yrs | Strong - top 15% | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 18.80% | 19.00% | Typical | 13,033 | | Power density | 188.2 | 190.0 | Typical | 13,001 | | Temperature coefficient | -0.360 | -0.360 | Typical | 12,345 | | Weight per kWp | 58.1 | 60.0 | Typical | 11,572 | | Performance warranty | 30 yrs | 25 yrs | Strong - top 15% | 21 | ### Strengths - **30 year performance warranty** - Top 15% of the PERC 300-350 W segment, against a median of 25 yrs. - **Best for:** Residential and commercial. ## Specification ### Electrical - **Rated power (Pmax):** 320 W - **Efficiency:** 18.80 % - **Voltage at Pmax (Vmp):** 32.88 V - **Current at Pmax (Imp):** 9.74 A - **Open-circuit voltage (Voc):** 40.10 V - **Short-circuit current (Isc):** 10.32 A - **Max system voltage:** 1000 V ### Temperature - **Temperature coefficient of Pmax:** -0.360 %/degC - **Temperature coefficient of Voc:** -0.280 %/degC - **Temperature coefficient of Isc:** 0.064 %/degC - **NOCT:** 46 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 60 ### Physical - **Length:** 1700 mm - **Width:** 1000 mm - **Thickness:** 38 mm - **Weight:** 18.6 kg - **Area:** 1.70 m2 - **Power density:** 188.2 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:** 0.50 % - **Output after 30 years:** 264 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 13033 of 14005 | | Power density | 13001 of 14005 | | Temperature coefficient | 12345 of 14005 | | Weight | 11572 of 14005 | | Warranty | 21 of 14005 | ## About this series The SIL-320 NL series from Silfab Solar is a solar panel designed for investors seeking a combination of aesthetics and reliability in a single product. The panel is built on 60 silicon cells using **mono-PERC technology** with five busbars, delivering stable operation and high solar energy conversion efficiency even under less favorable irradiance conditions. The distinctive **all-black design** (black anodized frame and black backsheet) allows the module to blend seamlessly with the architecture of modern single-family homes and commercial buildings with high visual standards, eliminating the visible silver elements typical of cheaper panels. Thanks to advanced cell technology and careful material selection, the module is **PID resistant**, ensuring stable energy production throughout its entire service life. The lightweight yet durable frame construction has been tested for **high wind and snow loads**, making it suitable for both sloped and flat roofs in demanding climate conditions. Manufacturing takes place in fully automated, certified facilities in North America, ensuring consistent quality and compliance with strict **BAA/ARRA** standards. The series is backed by a long-term manufacturer's warranty and a linear power performance guarantee, making it a safe choice for installations with a long investment payback horizon. ## Notable figures - Efficiency of 18.8% is 0.6pp below the \*\*PERC 0-400W\*\* median (19.4%) - 188.2 W/m² power density is 6.2 W/m² below \*\*PERC 0-400W\*\* median (194.4 W/m²) - requires larger installation area - At -0.36%/°C, hot weather performance is typical for \*\*PERC 0-400W\*\* panels - 18.6 kg weight - 1.9 kg lighter than \*\*PERC 0-400W\*\* median (20.5 kg), reducing installation effort - #13033 for efficiency, #12345 for temperature performance out of 14005 panels ## Questions ### Is the Silfab SIL-320 NL series still available for purchase? No, the SIL-320 NL model has been discontinued and replaced by newer, higher-output Silfab Solar series. Some units may still be found through select distributors as remaining stock, but availability is limited and shrinking. Anyone planning to expand an existing array should be prepared to source a replacement panel with comparable specifications. ### What warranty comes with Silfab SIL-320 NL panels? The manufacturer backs this series with a 25-year product warranty and a 30-year linear power output warranty, ensuring high efficiency is maintained throughout the module's service life. This is one of the longer warranty terms on the market, which matters especially for installations that amortize over two to three decades. It's still worth confirming with the seller that warranty coverage remains valid despite the model's discontinuation. ### How does the mono-PERC technology in SIL-320 NL differ from standard polycrystalline panels? Mono-PERC cells use monocrystalline silicon with an added passivation layer on the rear side of the cell that reflects unused light back into the silicon structure. This gives the panel higher conversion efficiency than cheaper polycrystalline modules, especially under low-light conditions or elevated operating temperatures. Five busbars per cell further improve current collection and module stability. ### Does the all-black design of the SIL-320 NL affect panel efficiency? The black anodized frame and black backsheet are primarily an aesthetic choice for buyers who care about the look of their roof or facade. It may slightly raise the module's operating temperature under full sun compared to a white-backsheet version, but thanks to the mono-PERC technology, the impact on annual energy yield is minimal. The priority of this variant is a uniform, sleek appearance without visible silver components. ### Are SIL-320 NL panels suitable for roofs exposed to heavy wind or snow loads? Yes, the module frame has been tested for high mechanical loads, including strong wind and heavy snow accumulation, as confirmed by product certifications. This makes the panel suitable for both pitched and flat roofs, including in more demanding climates such as mountain or coastal regions. It's still worth checking the exact load ratings in the datasheet when designing the mounting structure. ### Why do Silfab SIL-320 NL panels meet BAA/ARRA requirements? Silfab Solar manufactures its modules in fully automated, certified facilities in North America, allowing the panels to meet the strict requirements of the Buy American Act and the American Recovery and Reinvestment Act. This is critical for publicly funded U.S. projects or those requiring documented component origin. The company's Tier 1 manufacturer status further confirms financial stability and supplier reliability. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/Silfab-SIL-320-NL-20210722-Final-1-b86763378ed2.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [JA Solar NS-300MH-72](https://comparepv.com/panel/ja-solar-ns-300mh-72) | 300 W | Cooler, lighter, +4.5 pp | | [PolyCrown Solar Tech NS-300MH-72](https://comparepv.com/panel/polycrown-solar-tech-ns-300mh-72) | 300 W | Cooler, lighter, +4.5 pp | | [Heckert Solar ZEUS 1.2 FullBlack 280W](https://comparepv.com/panel/heckert-solar-zeus-1-2-fullblack-280w) | 280 W | Cooler, lighter, +4.5 pp | | [JA Solar NS-330MH-80](https://comparepv.com/panel/ja-solar-ns-330mh-80) | 330 W | Cooler, +4.3 pp, -5 yr warranty | | [PolyCrown Solar Tech NS-330MH-80](https://comparepv.com/panel/polycrown-solar-tech-ns-330mh-80) | 330 W | Cooler, +4.3 pp, -5 yr warranty | | [Gamko New Energy GKA182M285W](https://comparepv.com/panel/gamko-new-energy-gka182m285w) | 285 W | -35 W, lighter, +4.2 pp | | [Gamko New Energy GKA182M270W](https://comparepv.com/panel/gamko-new-energy-gka182m270w) | 270 W | -50 W, lighter, +4.2 pp | | [Gamko New Energy GKA182M300W](https://comparepv.com/panel/gamko-new-energy-gka182m300w) | 300 W | -20 W, lighter, +4.2 pp | | [Gamko New Energy GKA210M320W](https://comparepv.com/panel/gamko-new-energy-gka210m320w) | 320 W | Lighter, +4.2 pp | | [Silfab SIL-300 ML](https://comparepv.com/panel/silfab-sil-300-ml) | 300 W | -20 W, -1.2 pp | | [Silfab SIL-310 ML](https://comparepv.com/panel/silfab-sil-310-ml) | 310 W | -10 W, -0.6 pp | | [Silfab SIL-330 NL](https://comparepv.com/panel/silfab-sil-330-nl) | 330 W | +10 W, +0.6 pp | | [Jetion JT440SYK(B)](https://comparepv.com/panel/jetion-jt440syk-b) | 440 W | +120 W, cooler, +4.1 pp | | [Jetion JT435SYk(B)](https://comparepv.com/panel/jetion-jt435syk-b) | 435 W | +115 W, cooler, +3.9 pp | | [Maxeon SPR-MAX3-400-COM](https://comparepv.com/panel/maxeon-spr-max3-400-com) | 400 W | Cooler, +3.8 pp, +10 yr warranty | | [Jetion JT430SYk(B)](https://comparepv.com/panel/jetion-jt430syk-b) | 430 W | +110 W, cooler, +3.6 pp | --- Source: https://comparepv.com/panel/silfab-sil-320-nl Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.