--- title: "Silfab SLA-M 320 320W Solar Panel - Specs & Review | ComparePV" description: "Silfab SLA-M 320 320W solar panel. Specs: 19.60% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/silfab-sla-m-320" updated: 2026-09-11 --- # Silfab SLA-M 320 Warranty pick, weak in heat 2,653 panels in the 220-420 W band, all technologies ## Identity - **Manufacturer:** Silfab - **Model:** SLA-M 320 - **Series:** SLA-M - **Rated power:** 320 W - **Cell technology:** Monocrystalline ## How it compares Compared against 220-420 W band, all technologies (2653 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 320 W | 385 W | Weak - bottom 16% | | | Module efficiency | 19.60% | 20.10% | Typical | 12,589 | | Power density | 195.9 | 200.6 | Typical | 12,593 | | Temperature coefficient | -0.380 | -0.350 | Weak - bottom 12% | 13,397 | | Weight (kg) | 19.0 kg | 21.0 kg | Typical | | | Performance warranty | 30 yrs | 25 yrs | Strong - top 18% | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 19.60% | 20.10% | Typical | 12,589 | | Power density | 195.9 | 200.6 | Typical | 12,593 | | Temperature coefficient | -0.380 | -0.350 | Weak - bottom 12% | 13,397 | | Weight per kWp | 59.4 | 56.5 | Typical | 12,118 | | Performance warranty | 30 yrs | 25 yrs | Strong - top 18% | 21 | ### Strengths - **30 year performance warranty** - Top 18% of the 220-420 W band, against a median of 25 yrs. ### Watch out for - **-0.380 %/°C temperature coefficient** - Bottom 12% of the 220-420 W band, against a median of -0.350. - **Best for:** Residential, commercial and cold-climate. - **Not ideal for:** Hot climates. ## Specification ### Electrical - **Rated power (Pmax):** 320 W - **Efficiency:** 19.60 % - **Voltage at Pmax (Vmp):** 33.70 V - **Current at Pmax (Imp):** 9.50 A - **Open-circuit voltage (Voc):** 40.45 V - **Short-circuit current (Isc):** 9.96 A - **Max system voltage:** 1000 V ### Temperature - **Temperature coefficient of Pmax:** -0.380 %/degC - **Temperature coefficient of Voc:** -0.300 %/degC - **Temperature coefficient of Isc:** 0.030 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell count:** 60 ### Physical - **Length:** 1650 mm - **Width:** 990 mm - **Thickness:** 38 mm - **Weight:** 19.0 kg - **Area:** 1.63 m2 - **Power density:** 195.9 Wp/m2 ### Warranty and degradation - **Product warranty:** 25 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 80.0 % - **First-year degradation:** 3.00 % - **Annual degradation:** 0.59 % - **Output after 30 years:** 256 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 12589 of 14005 | | Power density | 12593 of 14005 | | Temperature coefficient | 13397 of 14005 | | Weight | 12118 of 14005 | | Warranty | 21 of 14005 | ## About this series The SLA-M series from Silfab Solar consists of monocrystalline 60-cell modules engineered for the North American market, where performance alone isn't enough without full compliance with local industry requirements. The panels are produced through a fully automated manufacturing process at ISO-certified facilities, resulting in one of the **lowest defect rates in the industry**. Silicon cells with 4 or 5 busbars combined with advanced material technology deliver **PID (potential-induced degradation) resistance**, a key factor for large commercial installations exposed to high system voltages. The lightweight aluminum **low-weight frame** simplifies mounting on structures with limited load-bearing capacity and is compatible with a wide range of racking systems, while the module still withstands extreme wind and snow loads. The sleek, **all-black design** makes SLA-M equally well suited to residential and commercial projects where installation aesthetics matter. The series targets investors and installers looking for a proven, bankable technology backed by a **25-year product warranty and 30-year power performance warranty**, minimizing technical and financial risk throughout the operating life of the solar installation. ## Notable figures - At 19.6% efficiency, this panel is 2.2pp below the \*\*database\*\* median of 21.8% - Power density of 195.9 W/m² is 22.2 W/m² below \*\*database\*\* median (218.1 W/m²) - needs more roof space - -0.38%/°C temperature coefficient - 0.08pp worse than \*\*database\*\* median (-0.30%/°C), expect higher hot weather losses - 19.0 kg weight - 7.5 kg lighter than \*\*database\*\* median (26.5 kg), reducing installation effort - Ranked #12589 out of 14005 panels for efficiency in the database ## Questions ### What is the maximum power output of the Silfab SLA-M panel, and how many modules are needed for a typical 5 kWp system? Modules in the SLA-M series reach a maximum power output of 320 Wp. At this unit power, a 5 kWp system would require approximately 15-16 panels. The panel is built on 60 monocrystalline cells with 4 or 5 busbars, delivering stable output in a relatively compact module footprint. ### Are Silfab SLA-M panels suitable for large commercial installations exposed to high system voltage? Yes, this is one of the series' key use cases. Advanced silicon cell technology provides resistance to potential induced degradation (PID), which is a particular risk in large-scale commercial arrays operating close to the 1000V maximum system voltage. This ensures the module maintains stable performance throughout its service life, even under demanding system conditions. ### Is the Silfab SLA-M series still available for purchase? No, the SLA-M series has been discontinued from current production and replaced by newer Silfab Solar module lines with higher unit power and updated cell technology. Panels may still be available in limited stock quantities through distributors, but prospective buyers should expect limited availability and confirm current stock with a seller before placing an order. ### Are Silfab SLA-M panels manufactured in North America, and does that matter for BAA/ARRA-compliant projects? Yes, the SLA-M series is built through a fully automated manufacturing process at ISO-certified facilities located in North America. Silfab Solar is headquartered in Canada and is a Tier 1 manufacturer. Panels in this series carried BAA (Buy American Act) and ARRA compliance certification, which mattered for projects funded through U.S. public financing. ### What warranty comes with Silfab SLA-M panels, and what exactly does it cover? The SLA-M series is backed by a 25-year product warranty covering material and workmanship defects, plus a 30-year linear power warranty guaranteeing a defined minimum performance level over time. This is standard for bankable manufacturers, minimizing the financial risk of a solar investment over its entire operating lifetime. ### Is the Silfab SLA-M a bifacial panel that generates power from its rear side? No, the SLA-M series is a standard monofacial panel, meaning it produces energy only from its front side. If additional energy yield from reflected light hitting the rear side is important to you, it's worth considering newer bifacial series in Silfab Solar's lineup, available as successors to this product line. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/Silfab-SLA-M-320-SF-0G-20191127-K-Final1-d35aa5f5b4a2.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, +3.7 pp | | [PolyCrown Solar Tech NS-300MH-72](https://comparepv.com/panel/polycrown-solar-tech-ns-300mh-72) | 300 W | Cooler, lighter, +3.7 pp | | [Heckert Solar ZEUS 1.2 FullBlack 280W](https://comparepv.com/panel/heckert-solar-zeus-1-2-fullblack-280w) | 280 W | Cooler, lighter, +3.7 pp | | [JA Solar NS-330MH-80](https://comparepv.com/panel/ja-solar-ns-330mh-80) | 330 W | Cooler, +3.5 pp, -5 yr warranty | | [PolyCrown Solar Tech NS-330MH-80](https://comparepv.com/panel/polycrown-solar-tech-ns-330mh-80) | 330 W | Cooler, +3.5 pp, -5 yr warranty | | [Gamko New Energy GKA182M285W](https://comparepv.com/panel/gamko-new-energy-gka182m285w) | 285 W | -35 W, lighter, +3.4 pp | | [Gamko New Energy GKA182M270W](https://comparepv.com/panel/gamko-new-energy-gka182m270w) | 270 W | -50 W, lighter, +3.4 pp | | [Gamko New Energy GKA182M300W](https://comparepv.com/panel/gamko-new-energy-gka182m300w) | 300 W | -20 W, lighter, +3.4 pp | | [Gamko New Energy GKA210M320W](https://comparepv.com/panel/gamko-new-energy-gka210m320w) | 320 W | Lighter, +3.4 pp | | [Silfab SLA-M 300 Wp](https://comparepv.com/panel/silfab-sla-m-300-wp) | 300 W | -20 W, -1.2 pp | | [Silfab SLA-M 310](https://comparepv.com/panel/silfab-sla-m-310) | 310 W | -10 W, -0.6 pp | | [Maxeon SPR-MAX3-400-COM](https://comparepv.com/panel/maxeon-spr-max3-400-com) | 400 W | Cooler, +3.0 pp, +10 yr warranty | | [Lina Energy LEPV 400](https://comparepv.com/panel/lina-energy-lepv-400) | 400 W | +80 W, cooler, +2.7 pp | | [Phono Solar NS-360MH-60](https://comparepv.com/panel/phono-solar-ns-360mh-60) | 360 W | Cooler, +2.5 pp, -5 yr warranty | | [PolyCrown Solar Tech NS-360MH-60](https://comparepv.com/panel/polycrown-solar-tech-ns-360mh-60) | 360 W | Cooler, +2.5 pp, -5 yr warranty | | [Maxeon SPR-MAX3-390-COM](https://comparepv.com/panel/maxeon-spr-max3-390-com) | 390 W | Cooler, +2.5 pp, +10 yr warranty | --- Source: https://comparepv.com/panel/silfab-sla-m-320 Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.