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Silfab Brand review

SIL-320 NL

320 Wp PERC
ComparePV verdict

Warranty pick, no clear weak spot

Rank 12,412 of 14,005
Compare panels Datasheet PDF
Power (Wp)
320
Typical for its class
Efficiency (%)
18.80
Typical · median 19.00%
Density (Wp/m²)
188.2
Typical · median 190.0
Temp (%/°C)
-0.360
Typical · median -0.360
Weight (kg)
18.6
Typical · median 19.0 kg
Warranty (yrs)
30
Strong · top 15%

The SIL-320 NL series from Silfab Solar is a solar panel designed for investors seeking a combination of aesthetics and reliability in a single product. The panel is built on 60 silicon cells using mono-PERC technology with five busbars, delivering stable operation and high solar energy conversion efficiency even under less favorable irradiance conditions. The distinctive all-black design (black anodized frame and black backsheet) allows the module to blend seamlessly with the architecture of modern single-family homes and commercial buildings with high visual standards, eliminating the visible silver elements typical of cheaper panels. Thanks to advanced cell technology and careful material selection, the module is PID resistant, ensuring stable energy production throughout its entire service life. The lightweight yet durable frame construction has been tested for high wind and snow loads, making it suitable for both sloped and flat roofs in demanding climate conditions. Manufacturing takes place in fully automated, certified facilities in North America, ensuring consistent quality and compliance with strict BAA/ARRA standards. The series is backed by a long-term manufacturer's warranty and a linear power performance guarantee, making it a safe choice for installations with a long investment payback horizon.

Ranking

286 panels in the segment PERC 300-350 W
Metric This panel Median Position in segment Overall rank
Module efficiency 18.80% 19.00% Typical 13,033
Power density 188.2 190.0 Typical 13,001
Temperature coefficient -0.360 -0.360 Typical 12,345
Weight per kWp 58.1 60.0 Typical 11,572
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

1 positive · 0 caution
Best for

Residential and commercial.

Strengths
30 year performance warranty

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

Notes from the database
  • Efficiency of 18.8% is 0.6pp below the PERC 0-400W median (19.4%)
  • 188.2 W/m² power density is 6.2 W/m² below PERC 0-400W median (194.4 W/m²) - requires larger installation area
  • At -0.36%/°C, hot weather performance is typical for PERC 0-400W panels
  • 18.6 kg weight - 1.9 kg lighter than PERC 0-400W median (20.5 kg), reducing installation effort
  • #13033 for efficiency, #12345 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 18.80 % Typical Segment median 19.00%
Vmpp · Impp 32.88 V · 9.74 A Operating point at max power
Voc · Isc 40.10 V · 10.32 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 18.6 kg Typical Typical · median 19.0 kg
Cells 60 · PERC Monocrystalline
Coefficient Pmax -0.360 %/°C Typical median -0.360 of its segment
Coefficient Voc · Isc -0.280 · 0.064 %/°C
NOCT 46 °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
-0.360 %/°C against a segment median of -0.360
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Silfab SIL-320 NL 320 W 18.80% -0.360 18.6 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 Cooler, lighter, +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, -1.2 pp
SIL-310 ML 310 W 18.20% -0.360 18.6 kg -10 W, -0.6 pp
SIL-330 NL 330 W 19.40% -0.360 18.6 kg +10 W, +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
Is the Silfab SIL-320 NL series still available for purchase?
No, the SIL-320 NL model has been discontinued and replaced by newer, higher-output Silfab Solar series. Some units may still be found through select distributors as remaining stock, but availability is limited and shrinking. Anyone planning to expand an existing array should be prepared to source a replacement panel with comparable specifications.
What warranty comes with Silfab SIL-320 NL panels?
The manufacturer backs this series with a 25-year product warranty and a 30-year linear power output warranty, ensuring high efficiency is maintained throughout the module's service life. This is one of the longer warranty terms on the market, which matters especially for installations that amortize over two to three decades. It's still worth confirming with the seller that warranty coverage remains valid despite the model's discontinuation.
How does the mono-PERC technology in SIL-320 NL differ from standard polycrystalline panels?
Mono-PERC cells use monocrystalline silicon with an added passivation layer on the rear side of the cell that reflects unused light back into the silicon structure. This gives the panel higher conversion efficiency than cheaper polycrystalline modules, especially under low-light conditions or elevated operating temperatures. Five busbars per cell further improve current collection and module stability.
Does the all-black design of the SIL-320 NL affect panel efficiency?
The black anodized frame and black backsheet are primarily an aesthetic choice for buyers who care about the look of their roof or facade. It may slightly raise the module's operating temperature under full sun compared to a white-backsheet version, but thanks to the mono-PERC technology, the impact on annual energy yield is minimal. The priority of this variant is a uniform, sleek appearance without visible silver components.
Are SIL-320 NL panels suitable for roofs exposed to heavy wind or snow loads?
Yes, the module frame has been tested for high mechanical loads, including strong wind and heavy snow accumulation, as confirmed by product certifications. This makes the panel suitable for both pitched and flat roofs, including in more demanding climates such as mountain or coastal regions. It's still worth checking the exact load ratings in the datasheet when designing the mounting structure.
Why do Silfab SIL-320 NL panels meet BAA/ARRA requirements?
Silfab Solar manufactures its modules in fully automated, certified facilities in North America, allowing the panels to meet the strict requirements of the Buy American Act and the American Recovery and Reinvestment Act. This is critical for publicly funded U.S. projects or those requiring documented component origin. The company's Tier 1 manufacturer status further confirms financial stability and supplier reliability.
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