--- title: "Silfab SIL-310 ML 310W Solar Panel - Specs & Review | ComparePV" description: "Silfab SIL-310 ML 310W solar panel. Specs: 18.20% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/silfab-sil-310-ml" updated: 2026-09-11 --- # Silfab SIL-310 ML Warranty pick, no clear weak spot 286 panels in the segment PERC 300-350 W ## Identity - **Manufacturer:** Silfab - **Model:** SIL-310 ML - **Series:** SIL ML - **Rated power:** 310 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) | 310 W | 325 W | Weak - bottom 17% | | | Module efficiency | 18.20% | 19.00% | Typical | 13,178 | | Power density | 182.4 | 190.0 | Typical | 13,151 | | 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 | 18.20% | 19.00% | Typical | 13,178 | | Power density | 182.4 | 190.0 | Typical | 13,151 | | Temperature coefficient | -0.360 | -0.360 | Typical | 12,345 | | Weight per kWp | 60.0 | 60.0 | Typical | 12,365 | | 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, commercial and cold-climate. ## Specification ### Electrical - **Rated power (Pmax):** 310 W - **Efficiency:** 18.20 % - **Voltage at Pmax (Vmp):** 33.05 V - **Current at Pmax (Imp):** 9.38 A - **Open-circuit voltage (Voc):** 40.25 V - **Short-circuit current (Isc):** 9.93 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:** 45 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:** 182.4 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:** 256 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 13178 of 14005 | | Power density | 13151 of 14005 | | Temperature coefficient | 12345 of 14005 | | Weight | 12365 of 14005 | | Warranty | 21 of 14005 | ## About this series The Silfab SIL ML series consists of monocrystalline PERC modules designed for residential and commercial installations where predictable performance and long-term durability matter most. The panels are manufactured in automated production facilities in North America, ensuring rigorous quality control at every stage and compliance with **Buy American Act and ARRA requirements**, a significant advantage for public and commercial projects across North America. The **PERC technology** combined with high-quality monocrystalline cells delivers stable energy output even under low-irradiance conditions and elevated operating temperatures. A robust, **reinforced frame construction** ensures resistance to snow and wind loads, making the ML series a solid choice for installers working in demanding climate conditions. A low power temperature coefficient limits summer performance losses, while the extensive quality control system results in consistent electrical parameters across the entire module batch. The SIL ML series is particularly well suited for projects where investors expect not only high efficiency but also **documented domestic manufacturing origin** and a stable manufacturer warranty. ## Notable figures - Efficiency of 18.2% is 1.2pp below the \*\*PERC 0-400W\*\* median (19.4%) - Power density of 182.3 W/m² is 12.1 W/m² below \*\*PERC 0-400W\*\* median (194.4 W/m²) - needs more roof space - Temperature coefficient of -0.36%/°C matches the \*\*PERC 0-400W\*\* median - At 18.6 kg, this panel is 1.9 kg lighter than \*\*PERC 0-400W\*\* median (20.5 kg) - easier handling during installation - In the top 94% for efficiency among all PERC panels ## Questions ### Is the Silfab SIL ML 310W series still available for purchase? No, production of the SIL ML series, including the 310 Wp model, has been discontinued and these panels are no longer manufactured by Silfab. Units may still be found in distributor stock or as surplus offers, but new orders can no longer be placed directly with the manufacturer. Anyone expanding an existing array should expect limited availability of identical modules and consider comparable replacement panels instead. ### What warranty comes with Silfab SIL ML panels? The SIL ML series carries a 25-year product warranty and a 30-year linear power output warranty. Despite the end of production, these warranties remain valid for already installed systems, since Silfab, a Canada-based tier 1 manufacturer, continues to support service claims for its earlier discontinued series. ### How does the PERC technology in SIL ML differ from standard monocrystalline panels? PERC technology adds a passivation layer on the back of the cell that reflects unused photons back into the silicon instead of losing them as heat. This gives SIL ML panels higher conversion efficiency than standard mono modules, particularly in low-light conditions, and helps maintain more stable energy output at elevated roof operating temperatures. ### Do Silfab SIL ML panels meet Buy American Act requirements for public projects? Yes, the SIL ML series is manufactured in automated North American facilities and complies with Buy American Act and ARRA requirements. This is a key advantage for public tenders, federal projects, and commercial installations in the US and Canada, where documented manufacturing origin is often a prerequisite for funding eligibility. ### Can SIL ML 310W panels handle heavy snow loads? Yes, the SIL ML series features a reinforced frame construction designed for demanding climates, giving it higher resistance to snow and wind loads than standard frames. This made it a popular choice among installers working in regions with harsh winters, such as the northern United States and Canada. ### Are Silfab SIL ML modules bifacial panels? No, the SIL ML series consists of monofacial panels that generate power only from the front surface. Customers interested in bifacial technology, which also captures light reflected off the ground, should look at Silfab's newer bifacial series instead, as SIL ML does not offer this feature. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/Silfab-SIL-310-ML-20200702-Final-40e5029292b4.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, +5.1 pp | | [PolyCrown Solar Tech NS-300MH-72](https://comparepv.com/panel/polycrown-solar-tech-ns-300mh-72) | 300 W | Cooler, lighter, +5.1 pp | | [Heckert Solar ZEUS 1.2 FullBlack 280W](https://comparepv.com/panel/heckert-solar-zeus-1-2-fullblack-280w) | 280 W | Cooler, lighter, +5.1 pp | | [JA Solar NS-330MH-80](https://comparepv.com/panel/ja-solar-ns-330mh-80) | 330 W | Cooler, +4.9 pp, -5 yr warranty | | [PolyCrown Solar Tech NS-330MH-80](https://comparepv.com/panel/polycrown-solar-tech-ns-330mh-80) | 330 W | Cooler, +4.9 pp, -5 yr warranty | | [Gamko New Energy GKA182M285W](https://comparepv.com/panel/gamko-new-energy-gka182m285w) | 285 W | -25 W, lighter, +4.8 pp | | [Gamko New Energy GKA182M260W](https://comparepv.com/panel/gamko-new-energy-gka182m260w) | 260 W | -50 W, lighter, +4.8 pp | | [Gamko New Energy GKA182M270W](https://comparepv.com/panel/gamko-new-energy-gka182m270w) | 270 W | -40 W, lighter, +4.8 pp | | [Gamko New Energy GKA182M300W](https://comparepv.com/panel/gamko-new-energy-gka182m300w) | 300 W | -10 W, lighter, +4.8 pp | | [Silfab SIL-300 ML](https://comparepv.com/panel/silfab-sil-300-ml) | 300 W | -10 W, -0.6 pp | | [Silfab SIL-320 BL](https://comparepv.com/panel/silfab-sil-320-bl) | 320 W | +10 W, hotter, +0.6 pp | | [Silfab SIL-330 NL](https://comparepv.com/panel/silfab-sil-330-nl) | 330 W | +20 W, +1.2 pp | | [Jetion JT440SYK(B)](https://comparepv.com/panel/jetion-jt440syk-b) | 440 W | +130 W, cooler, +4.7 pp | | [Jetion JT435SYk(B)](https://comparepv.com/panel/jetion-jt435syk-b) | 435 W | +125 W, cooler, +4.5 pp | | [Maxeon SPR-MAX3-400-COM](https://comparepv.com/panel/maxeon-spr-max3-400-com) | 400 W | +90 W, +4.4 pp, +10 yr warranty | | [Jetion JT430SYk(B)](https://comparepv.com/panel/jetion-jt430syk-b) | 430 W | +120 W, cooler, +4.2 pp | --- Source: https://comparepv.com/panel/silfab-sil-310-ml Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.