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Silfab Brand review

SLG-X-350

350 Wp N-type Bifacial 85%
ComparePV verdict

Warranty pick, weak in heat

Rank 13,026 of 14,005
Compare panels Datasheet PDF
Power (Wp)
350
Weak · bottom 6%
Efficiency (%)
17.95
Weak · bottom 19%
Density (Wp/m²)
179.5
Weak · bottom 19%
Temp (%/°C)
-0.415
Weak · bottom 2%
Weight (kg)
23.0
Typical · median 22.0 kg
Warranty (yrs)
30
Strong · top 19%

The Silfab SLG-X Bifacial series consists of dual-sided solar modules engineered to maximize energy yield wherever every square meter of roof or ground space counts. At the core of the design are N-type bifacial cells, which, thanks to a high bifaciality factor, generate additional energy reflected from the ground surface, setting them apart from cheaper solutions based on P-type cells. The panels feature a transparent rear backsheet along with tempered, anti-reflective coated glass on both sides, allowing efficient capture of diffuse and reflected light. The built-in PID-resistant technology and POE encapsulant minimize the risk of potential induced degradation, while near-zero LID translates into higher energy production from the very first year of operation. The SLG-X Bifacial series is well suited for commercial, industrial, and premium installations where aesthetics and durability matter, and where investors expect a low annual degradation rate and predictable LCOE over a 30-year horizon. It's a solution for anyone seeking modules with increased power density and an architectural look, ready for high-voltage systems up to 1000 V.

Ranking

51 panels in the segment N-type 350-400 W
Metric This panel Median Position in segment Overall rank
Module efficiency 17.95% 20.00% Weak · bottom 19% 13,240
Power density 179.5 200.4 Weak · bottom 19% 13,223
Temperature coefficient -0.415 -0.320 Weak · bottom 2% 13,794
Weight per kWp 65.7 62.0 Typical 13,103
Performance warranty 30 yrs 25 yrs Strong · top 19% 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

1 positive · 3 caution
Best for

Commercial.

Not ideal for

Hot climates, tight roof space and roofs where every square metre has to count.

Strengths
30 year performance warranty

Top 19% of the N-type 350-400 W segment, against a median of 25 yrs.

Watch-outs
-0.415 %/°C temperature coefficient

Bottom 2% of the N-type 350-400 W segment, against a median of -0.320. Ranked 13,794th in the whole database.

17.95% module efficiency

Bottom 19% of the N-type 350-400 W segment, against a median of 20.00%.

179.5 watts per square metre

Bottom 19% of the N-type 350-400 W segment, against a median of 200.4.

Notes from the database
  • At 17.9% efficiency, this panel is 1.5pp below the N-type 0-400W median of 19.5%
  • 179.5 W/m² power density is 15.4 W/m² below N-type 0-400W median (194.9 W/m²) - requires larger installation area
  • Temperature coefficient of -0.41%/°C is 0.09pp worse than N-type 0-400W median (-0.32%/°C) - higher losses in summer heat
  • At 23.0 kg, weight matches the N-type 0-400W median
  • Bifacial design (85% factor) captures reflected light - adds 4-13% yield on ground-mount or white roof

Specifications

Open datasheet PDF
Nominal power (Pmax) 350 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 17.95 % Weak Segment median 20.00%
Vmpp · Impp 39.59 V · 8.85 A Operating point at max power
Voc · Isc 47.28 V · 9.38 A Sizes the string length
Max system voltage 1000 V Longer strings than 1000 V modules
Dimensions 1970×990×38 mm · 1.95 m² of roof
Weight 23.0 kg Typical Typical · median 22.0 kg
Cells 72 · N-type Monocrystalline
Bifaciality 85 % Rear output as a share of front
Coefficient Pmax -0.415 %/°C Weak bottom 2% of its segment
Coefficient Voc · Isc -0.280 · 0.041 %/°C
NOCT 43 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 30 years Strong top 19% · median 25 yrs
End-of-warranty output 88.4 % Equals 307 W guaranteed
Degradation 0.70 → 0.40 % First year, then annual

Simulations

Live - change any input
Lifetime output & value
30 years at 1200 kWh/kWp/year and €0.50 per kWh
Power in year 30
-
Lifetime energy
-
Energy value
-
With bifacial gain
-

Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.

Heat losses
-0.415 %/°C against a segment median of -0.320
-
Bifacial gain
Rear gain over light concrete: -
-

Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.

Filter these
Size
Panel Power Eff. Temp. Weight Difference
Silfab SLG-X-350 350 W 17.95% -0.415 23.0 kg You are here
NS-300MH-72 300 W 23.32% -0.290 12.5 kg Cooler, lighter, +5.4 pp
NS-300MH-72 300 W 23.32% -0.290 12.5 kg Cooler, lighter, +5.4 pp
NS-330MH-80 330 W 23.15% -0.290 15.0 kg Cooler, lighter, +5.2 pp
NS-330MH-80 330 W 23.15% -0.290 15.0 kg Cooler, lighter, +5.2 pp
GKA182M300W 300 W 23.00% - 16.2 kg -50 W, lighter, +5.1 pp
GKA210M320W 320 W 23.00% - 16.2 kg -30 W, lighter, +5.1 pp
GKA210M340W 340 W 23.00% - 16.2 kg -10 W, lighter, +5.1 pp
GKA210M360W 360 W 23.00% - 16.2 kg +10 W, lighter, +5.1 pp
GKA210M380W (1/4*4*38) 380 W 23.00% - 17.1 kg +30 W, lighter, +5.1 pp
GKA210M400W (1/2*4*20) 400 W 23.00% - 18.0 kg +50 W, lighter, +5.1 pp
SLG-M 360 360 W 18.50% -0.380 23.0 kg +10 W, cooler, +0.6 pp
SLG-M 370 370 W 19.00% -0.380 23.0 kg +20 W, cooler, +1.1 pp
SPR-MAX7-475 475 W 24.00% -0.270 21.1 kg +125 W, cooler, +6.1 pp
SPR-MAX7-470 470 W 23.70% -0.270 21.1 kg +120 W, cooler, +5.8 pp
SPR-MAX7-465 465 W 23.50% -0.270 21.1 kg +115 W, cooler, +5.6 pp
SPR-MAX6-440 440 W 22.80% -0.290 20.9 kg Cooler, +4.9 pp, +10 yr warranty

Found 52 panels of the same or similar size to this one, within ±10 mm. See them here Found 273 panels of the same or similar size to this one, within ±25 mm. See them here Found 437 panels of the same or similar size to this one, within ±50 mm. See them here Found 542 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
Is the Silfab SLG-X Bifacial series still available for purchase?
No, production of the SLG-X Bifacial series has ended and this model has been discontinued from Silfab's current lineup. Panels may still be available from distributors as remaining stock, but they are no longer manufactured. Anyone planning to extend an existing installation built on these modules should expect limited availability and confirm current stock with a supplier before purchasing.
How do N-type bifacial cells in the Silfab SLG-X differ from standard P-type monocrystalline panels?
N-type cells have a lower light-induced degradation (LID) rate than P-type cells, resulting in higher energy output from the very first year of operation. In addition, bifacial technology allows the panel to capture light reflected off the ground through the transparent backsheet on the rear side, generating several extra percentage points of energy compared to a conventional single-sided P-type panel of the same nominal power.
What warranty comes with the Silfab SLG-X Bifacial panels and what does it cover?
The manufacturer provides a 12-year product warranty covering material and workmanship defects, along with a 30-year power performance warranty guaranteeing minimum energy output over that period. This is a higher standard than the typical 25-year power warranty offered by many P-type panel manufacturers, translating into a lower projected LCOE over a three-decade system lifetime.
Are Silfab SLG-X Bifacial panels rated for high-voltage systems up to 1000 V?
Yes, SLG-X Bifacial modules are certified for a maximum system voltage of up to 1000 V, which is standard for commercial and industrial installations with large numbers of modules connected in series strings. This allows an installer to design longer strings, reducing the number of inverters and cable runs needed, thereby lowering wiring costs in larger BoS budgets.
Is Silfab a tier-1 manufacturer, and where are SLG-X Bifacial panels made?
Yes, Silfab Solar is a recognized tier-1 manufacturer headquartered in Mississauga, Canada, with its own production facilities in Canada and the United States and over 40 years of experience in the photovoltaic industry. Tier-1 status reflects the company's financial stability and long track record of bankable projects, which matters for financing commercial installations and securing favorable loan terms.
Which installations best suit the Silfab SLG-X Bifacial series — rooftop or ground-mount?
SLG-X Bifacial panels perform best in ground-mount arrays and on flat commercial or industrial roofs, where the module can be mounted over a light-colored surface (gravel, white membrane, grass) that reflects light onto the rear side. On typical pitched roofs with dark roofing material, the bifacial gain is limited, so the benefit of the technology is much smaller in that setup.
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