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Silfab Brand review

SIL-320 BL

320 Wp PERC
ComparePV verdict

Warranty pick, no clear weak spot

Rank 12,392 of 14,005
Compare panels Datasheet PDF
Power (Wp)
320
Typical for its class
Efficiency (%)
18.84
Typical · median 19.00%
Density (Wp/m²)
188.2
Typical · median 190.0
Temp (%/°C)
-0.377
Typical · median -0.360
Weight (kg)
18.2
Strong · top 22%
Warranty (yrs)
30
Strong · top 15%

The Silfab BC Series answers the growing demand among homeowners for solar aesthetics that don't come at the cost of performance. The back contact technology used in these modules moves all electrical connections to the rear of the cell, leaving the front surface free of metallization grids and fully uniform in appearance. This design eliminates the visible busbar lines typical of conventional panels, creating a sleek, all-black look that's especially well-suited for street-facing roofs, where design matters just as much as specifications. Beyond its visual appeal, back contact technology reduces shading losses on the front side of the cell while also relieving mechanical stress at the electrical contact points, resulting in improved durability and long-term stability. The panels are built on high-quality monocrystalline PERC cells, sandwiched between high-transmittance tempered glass and a modern polymer backsheet. The Silfab BC Series is backed by a long-term manufacturer warranty, covering both workmanship and linear power performance, making it a strong choice for installations that call for a combination of premium design, reliability, and predictable energy yield.

Ranking

286 panels in the segment PERC 300-350 W
Metric This panel Median Position in segment Overall rank
Module efficiency 18.84% 19.00% Typical 13,022
Power density 188.2 190.0 Typical 13,001
Temperature coefficient -0.377 -0.360 Typical 13,390
Weight per kWp 56.9 60.0 Strong · top 22% 10,911
Performance warranty 30 yrs 25 yrs Strong · top 15% 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

2 positive · 0 caution
Best for

Residential and BIPV.

Strengths
30 year performance warranty

Top 15% of the PERC 300-350 W segment, against a median of 25 yrs.

56.9 kg per kWp

Top 22% of the PERC 300-350 W segment, against a median of 60.0.

Notes from the database
  • Efficiency of 18.8% is 0.6pp below the PERC 0-400W median (19.4%)
  • Power density of 188.2 W/m² is 6.2 W/m² below PERC 0-400W median (194.4 W/m²) - needs more roof space
  • At -0.38%/°C, hot weather performance is typical for PERC 0-400W panels
  • Weight of 18.2 kg (2.3 kg below PERC 0-400W median of 20.5 kg) allows easier transport and roof mounting
  • #13022 for efficiency, #13390 for temperature performance out of 14005 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 320 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 18.84 % Typical Segment median 19.00%
Vmpp · Impp 34.36 V · 9.32 A Operating point at max power
Voc · Isc 42.04 V · 9.77 A Sizes the string length
Max system voltage 1000 V Longer strings than 1000 V modules
Dimensions 1700×1000×38 mm · 1.70 m² of roof
Weight 18.2 kg Strong Strong · top 22%
Cells 126 · PERC Monocrystalline
Coefficient Pmax -0.377 %/°C Typical median -0.360 of its segment
Coefficient Voc · Isc -0.279 · 0.046 %/°C
NOCT 44 °C At 800 W/m², 20 °C ambient
Product warranty 25 years Hardware defects only
Performance warranty 30 years Strong top 15% · median 25 yrs
End-of-warranty output 82.6 % Equals 264 W guaranteed
Degradation 2.90 → 0.50 % 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
-

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

Heat losses
-0.377 %/°C against a segment median of -0.360
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Silfab SIL-320 BL 320 W 18.84% -0.377 18.2 kg You are here
NS-300MH-72 300 W 23.32% -0.290 12.5 kg Cooler, lighter, +4.5 pp
NS-300MH-72 300 W 23.32% -0.290 12.5 kg Cooler, lighter, +4.5 pp
ZEUS 1.2 FullBlack 280W 280 W 23.31% -0.260 14.3 kg -40 W, cooler, +4.5 pp
NS-330MH-80 330 W 23.15% -0.290 15.0 kg Cooler, +4.3 pp, -5 yr warranty
NS-330MH-80 330 W 23.15% -0.290 15.0 kg Cooler, +4.3 pp, -5 yr warranty
GKA182M285W 285 W 23.00% - 10.8 kg -35 W, lighter, +4.2 pp
GKA182M270W 270 W 23.00% - 10.8 kg -50 W, lighter, +4.2 pp
GKA182M300W 300 W 23.00% - 16.2 kg -20 W, lighter, +4.2 pp
GKA210M320W 320 W 23.00% - 16.2 kg Lighter, +4.2 pp
SIL-300 ML 300 W 17.60% -0.360 18.6 kg -20 W, cooler, -1.2 pp
SIL-310 ML 310 W 18.20% -0.360 18.6 kg -10 W, cooler, -0.6 pp
SIL-330 NL 330 W 19.40% -0.360 18.6 kg +10 W, cooler, +0.6 pp
JT440SYK(B) 440 W 22.90% -0.240 23.0 kg +120 W, cooler, +4.1 pp
JT435SYk(B) 435 W 22.70% -0.240 23.0 kg +115 W, cooler, +3.9 pp
SPR-MAX3-400-COM 400 W 22.60% -0.270 19.0 kg Cooler, +3.8 pp, +10 yr warranty
JT430SYk(B) 430 W 22.40% -0.240 23.0 kg +110 W, cooler, +3.6 pp

Found 41 panels of the same or similar size to this one, within ±10 mm. See them here Found 161 panels of the same or similar size to this one, within ±25 mm. See them here Found 289 panels of the same or similar size to this one, within ±50 mm. See them here Found 812 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
How does back contact technology in Silfab BC panels differ from panels with front-side busbars?
In conventional panels, metal busbars and finger contacts sit on the front of the cell, creating visible lines and slightly reducing active surface area. In the Silfab BC Series, all 126 half-cut cells have their electrical connections moved to the rear, over a black backsheet. The front surface is fully uniform with no visible metallization grid, while the panel still reaches up to 19% efficiency with reduced front-shading losses.
What warranty comes with the Silfab BC Series and what does it cover?
The Silfab BC Series carries a 25-year product warranty covering workmanship and materials, plus a 30-year linear power output warranty. This means protection against manufacturing defects as well as gradual power degradation over the module's operating life. It's one of the longer warranty periods offered among Tier 1 manufacturers, giving investors greater confidence in predictable system output over three decades.
Is the Silfab BC Series still available for purchase?
No, the Silfab BC Series has been discontinued and is no longer part of the manufacturer's standard current lineup. Availability is now limited to remaining distributor stock or the secondary market. Anyone planning a new installation should ask their supplier about Silfab's current successor series with similar back contact technology, since sourcing matching inverters and accessories for a discontinued model may become harder over time.
Are Silfab BC panels suitable for roofs visible from street level?
Yes, this is one of the series' main use cases. The absence of visible busbars and the uniform, fully black appearance make Silfab BC panels blend well with a home's facade rather than looking like a typical industrial array. That's why the manufacturer targeted this series primarily at residential customers for whom roof aesthetics matter as much as energy performance.
How does the Silfab BC Series perform on hot summer roofs?
The series has a low power temperature coefficient and a NOCT of 43°C (±2°C), the cell's operating temperature under typical irradiance conditions. This means the panel loses relatively less power in high heat compared to modules with a higher temperature coefficient, resulting in more stable energy yield on hot summer days, which matters especially for roofs with limited ventilation.
Is Silfab a Tier 1 manufacturer, and where is the BC Series produced?
Yes, Silfab Solar is a Tier 1 manufacturer headquartered in Canada and one of the largest automated PV module makers in North America. Like the rest of the brand's lineup, the BC Series was manufactured at North American production facilities, which for some buyers is an important factor when evaluating a supplier's quality control and supply chain.
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