--- title: "Silfab SLG-M 370 370W Solar Panel - Specs & Review | ComparePV" description: "Silfab SLG-M 370 370W solar panel. Specs: 19.00% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/silfab-slg-m-370" updated: 2026-09-11 --- # Silfab SLG-M 370 Middle of its segment, weak in heat 5,700 panels in the 270-470 W band, all technologies ## Identity - **Manufacturer:** Silfab - **Model:** SLG-M 370 - **Series:** SLG-M - **Rated power:** 370 W - **Cell technology:** Monocrystalline ## How it compares Compared against 270-470 W band, all technologies (5700 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 370 W | 425 W | Weak - bottom 17% | | | Module efficiency | 19.00% | 21.06% | Weak - bottom 12% | 12,945 | | Power density | 189.7 | 210.3 | Weak - bottom 12% | 12,953 | | Temperature coefficient | -0.380 | -0.320 | Weak - bottom 5% | 13,397 | | Weight (kg) | 23.0 kg | 22.0 kg | Weak - bottom 14% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 19.00% | 21.06% | Weak - bottom 12% | 12,945 | | Power density | 189.7 | 210.3 | Weak - bottom 12% | 12,953 | | Temperature coefficient | -0.380 | -0.320 | Weak - bottom 5% | 13,397 | | Weight per kWp | 62.2 | 53.7 | Weak - bottom 14% | 12,746 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **-0.380 %/°C temperature coefficient** - Bottom 5% of the 270-470 W band, against a median of -0.320. Ranked 13,397th in the whole database. - **189.7 watts per square metre** - Bottom 12% of the 270-470 W band, against a median of 210.3. - **19.00% module efficiency** - Bottom 12% of the 270-470 W band, against a median of 21.06%. - **Best for:** Residential and commercial. - **Not ideal for:** Hot climates, roofs where every square metre has to count and tight roof space. ## Specification ### Electrical - **Rated power (Pmax):** 370 W - **Efficiency:** 19.00 % - **Voltage at Pmax (Vmp):** 39.60 V - **Current at Pmax (Imp):** 9.35 A - **Open-circuit voltage (Voc):** 48.20 V - **Short-circuit current (Isc):** 9.93 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:** 72 ### Physical - **Length:** 1970 mm - **Width:** 990 mm - **Thickness:** 38 mm - **Weight:** 23.0 kg - **Area:** 1.95 m2 - **Power density:** 189.7 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:** 0.55 % - **Output after 30 years:** 300 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 12945 of 14005 | | Power density | 12953 of 14005 | | Temperature coefficient | 13397 of 14005 | | Weight | 12746 of 14005 | | Warranty | 21 of 14005 | ## About this series The SLG-M series consists of 72-cell monocrystalline modules engineered to deliver maximum power density on every square meter of roof or ground space. The panels feature a **lightweight, reinforced frame construction** rated to withstand loads of up to 5400 Pa, making them suitable for both structurally limited rooftops and ground-mount or tracker installations. The cell technology used provides **PID resistance** in line with IEC 62804-1, ensuring stable energy output throughout the module's operating life. SLG-M panels are built through a **fully automated manufacturing process** in North America, keeping factory defect rates remarkably low and guaranteeing consistent quality across every unit. The sleek, all-black design blends seamlessly into a building's architecture without sacrificing performance. The series is backed by a **25-year product warranty and a 30-year power warranty**, making it an attractive choice for investors seeking long-term confidence in their solar investment. This is a panel for installers and homeowners who value proven technology, clean aesthetics, and lasting reliability, without having to trade one for the other. ## Notable figures - Efficiency of 19.0% is 2.8pp below the \*\*database\*\* median (21.8%) - Power density of 189.7 W/m² is 28.4 W/m² below \*\*database\*\* median (218.1 W/m²) - needs more roof space - Temperature coefficient of -0.38%/°C is 0.08pp worse than \*\*database\*\* median (-0.30%/°C) - higher losses in summer heat - 23.0 kg weight - 3.5 kg lighter than \*\*database\*\* median (26.5 kg), reducing installation effort - Ranked #12945 out of 14005 panels for efficiency in the database ## Questions ### Are Silfab SLG-M 370 panels still available for purchase? The SLG-M series has been discontinued by Silfab Solar and replaced by newer module lines. Some SLG-M units may still be available through distributors as remaining stock, but buyers should check the production date and confirm warranty validity with the seller, since the manufacturer no longer provides active support for this specific model. ### What is the maximum power output of the Silfab SLG-M panel, and how many are needed for a typical 6 kW system? The SLG-M panel reaches a maximum power output of 370 Wp with 72 monocrystalline cells. To build a system of roughly 6 kW, you would need about 16 modules. Thanks to its high power density, this panel works well on roofs with limited surface area where maximizing output per square meter matters most. ### What warranty applies to Silfab SLG-M panels, and is it still reliable now that the series is discontinued? Silfab provides a 25-year product warranty and a 30-year power warranty for the SLG-M series. Although the series is no longer manufactured, Silfab remains an active company and continues to honor warranties issued for previously sold modules, so the warranty documentation stays valid for its full declared term. ### Can Silfab SLG-M panels withstand heavy snow loads or strong wind? Yes, the reinforced frame construction of the SLG-M withstands loads up to 5400 Pa, higher than many standard modules. This makes the panel suitable for regions with heavy snowfall and for installations exposed to strong wind, including trackers and ground-mount systems where the structure faces greater mechanical stress. ### What does PID resistance mean for the SLG-M series, and why does it matter? Potential-induced degradation (PID) is a phenomenon that reduces module power due to voltage differences between the cells and the grounded frame. SLG-M panels are tested to IEC 62804-1 and resist this effect, resulting in more stable energy production over the panel's lifetime, especially important in large arrays with multiple series-connected strings. ### How do Silfab SLG-M panels differ from typical modules manufactured in Asia? The key difference is the manufacturing location: SLG-M is produced in a fully automated facility in North America, which reduces factory defects and delivers more consistent quality than many manually assembled production lines. Silfab is a tier 1 manufacturer, which further reflects the company's financial stability and the reliability of its warranty commitments. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/Silfab-SLG-M-370-SF-0G-20191127-K-Final1-5b1b544bf880.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [JA Solar NS-330MH-80](https://comparepv.com/panel/ja-solar-ns-330mh-80) | 330 W | Cooler, lighter, +4.1 pp | | [PolyCrown Solar Tech NS-330MH-80](https://comparepv.com/panel/polycrown-solar-tech-ns-330mh-80) | 330 W | Cooler, lighter, +4.1 pp | | [Gamko New Energy GKA210M320W](https://comparepv.com/panel/gamko-new-energy-gka210m320w) | 320 W | -50 W, lighter, +4.0 pp | | [Gamko New Energy GKA210M340W](https://comparepv.com/panel/gamko-new-energy-gka210m340w) | 340 W | -30 W, lighter, +4.0 pp | | [Gamko New Energy GKA210M360W](https://comparepv.com/panel/gamko-new-energy-gka210m360w) | 360 W | -10 W, lighter, +4.0 pp | | [Gamko New Energy GKA210M380W (1/4\*4\*38)](https://comparepv.com/panel/gamko-new-energy-gka210m380w-1-4-4-38) | 380 W | +10 W, lighter, +4.0 pp | | [Gamko New Energy GKA210M400W (1/2\*4\*20)](https://comparepv.com/panel/gamko-new-energy-gka210m400w-1-2-4-20) | 400 W | +30 W, lighter, +4.0 pp | | [Gamko New Energy GKA210M400W (1/4\*4\*40)](https://comparepv.com/panel/gamko-new-energy-gka210m400w-1-4-4-40) | 400 W | +30 W, lighter, +4.0 pp | | [Gamko New Energy GKA210M380W (1/2\*4\*19)](https://comparepv.com/panel/gamko-new-energy-gka210m380w-1-2-4-19) | 380 W | +10 W, lighter, +4.0 pp | | [Maxeon SPR-MAX3-400-COM](https://comparepv.com/panel/maxeon-spr-max3-400-com) | 400 W | Cooler, +3.6 pp, +10 yr warranty | | [Silfab SLG-X-350](https://comparepv.com/panel/silfab-slg-x-350) | 350 W | -20 W, hotter, -1.1 pp | | [Silfab SLG-M 360](https://comparepv.com/panel/silfab-slg-m-360) | 360 W | -10 W, -0.5 pp | | [Maxeon SPR-MAX7-475](https://comparepv.com/panel/maxeon-spr-max7-475) | 475 W | +105 W, cooler, +5.0 pp | | [Maxeon SPR-MAX7-470](https://comparepv.com/panel/maxeon-spr-max7-470) | 470 W | +100 W, cooler, +4.7 pp | | [Maxeon SPR-MAX7-465](https://comparepv.com/panel/maxeon-spr-max7-465) | 465 W | Cooler, +4.5 pp, +10 yr warranty | | [Maxeon SPR-MAX6-440](https://comparepv.com/panel/maxeon-spr-max6-440) | 440 W | Cooler, +3.8 pp, +10 yr warranty | --- Source: https://comparepv.com/panel/silfab-slg-m-370 Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.