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Manufacturer review

Silfab panels, read off the datasheets

Silfab Solar is a North American leader in the design, development, and manufacture of high-efficiency, premium-quality solar cells and modules. Leveraging over 40 years of solar experience, they operate fully automated facilities in Washington, South Carolina, and Ontario, Canada. Their products are...

Everything below is computed from those 47 datasheets: no score out of ten, no ranking of brands against each other, and nothing a manufacturer can pay to change. Where Silfab does not publish a figure, it is left out of the average rather than assumed.

Panels
47
models in the database
Average efficiency
20.6%
across the catalogue
Best efficiency
22.9%
their strongest module
Power range
300-640 Wp
smallest to largest
Bifacial share
30%
14 dual-sided models
Average warranty
30 years
guaranteed output term
01

The top of the range

The leaders of Silfab's own catalogue on the two figures a specification sheet leads with. Neither is a verdict: the most efficient module in a range is rarely the one that suits a given roof.

Most efficient module efficiency
1 SIL-640 XL Monocrystalline bifacial 640 Wp 22.9% 2 SIL-590 XM+ Monocrystalline bifacial 590 Wp 22.8% 3 SIL-540-XM-BIFACIAL Monocrystalline bifacial 540 Wp 22.7% 4 SIL-440 QD Monocrystalline 440 Wp 22.6% 5 SIL-630 XL Monocrystalline bifacial 630 Wp 22.6%
Sort the whole catalogue by efficiency
Highest power nameplate output
1 SIL-640 XL Monocrystalline bifacial 22.9% 640 Wp 2 SIL-630 XL Monocrystalline bifacial 22.6% 630 Wp 3 SIL-620 XL Monocrystalline bifacial 22.2% 620 Wp 4 SIL-590 XM+ Monocrystalline bifacial 22.8% 590 Wp 5 SIL-580-XM+-BIFACIAL Monocrystalline bifacial 22.4% 580 Wp
Sort the whole catalogue by power
02

By what the array is for

Three cuts of the same catalogue, each ordered by efficiency inside its band. An empty column means the brand does not build for that case.

For a house roof 380-460 Wp
1 SIL-440 QD Monocrystalline 440 Wp 22.6% 2 SIL-430 QD Monocrystalline 430 Wp 22.1% 3 SIL-430-QD Monocrystalline 430 Wp 22.1% 4 SIL-420-BG Monocrystalline 420 Wp 21.9% 5 SIL-420 QD Monocrystalline 420 Wp 21.5%
For a commercial array 500 Wp and up
1 SIL-640 XL Monocrystalline bifacial 640 Wp 22.9% 2 SIL-630 XL Monocrystalline bifacial 630 Wp 22.6% 3 SIL-620 XL Monocrystalline bifacial 620 Wp 22.2% 4 SIL-590 XM+ Monocrystalline bifacial 590 Wp 22.8% 5 SIL-580-XM+-BIFACIAL Monocrystalline bifacial 580 Wp 22.4%
For a ground mount dual-sided
1 SIL-640 XL Monocrystalline bifacial 640 Wp 22.9% 2 SIL-590 XM+ Monocrystalline bifacial 590 Wp 22.8% 3 SIL-540-XM-BIFACIAL Monocrystalline bifacial 540 Wp 22.7% 4 SIL-630 XL Monocrystalline bifacial 630 Wp 22.6% 5 SIL-580-XM+-BIFACIAL Monocrystalline bifacial 580 Wp 22.4%
03

What the catalogue is made of

Cell technology across the market

Shares are of the 47 modules in the database, counted once each. A power ladder of one module counts as its rungs, which is why a large catalogue is not the same as a wide one.

Cell technology share of the catalogue
PERC 44.7% 21 N-type 40.4% 19 Unknown 12.8% 6 TOPCon 2.1% 1
PERC accounts for 44.7% of the catalogue - 21 of 47 modules.
Efficiency spread share of the catalogue
<20% 40.4% 19 20-21% 10.6% 5 21-22% 21.3% 10 22-23% 27.7% 13
04

Strengths and gaps

Both lists are derived from the figures above rather than written about the brand. A gap here is a gap in what is published, which is not always a gap in what is built.

What this catalogue is good at
  • Tier 1 bankable manufacturer - recognized by major financial institutions
  • High-efficiency panels available (up to 22.9%)
  • Strong warranty coverage averaging 30 years
  • High-power panels available (up to 640W) for commercial applications
  • Large-scale production capacity of 1.6 GW
Where it is thin
  • Average efficiency of 20.6% is below the industry leading edge
  • Limited adoption of latest cell technologies (TOPCon/HJT)
05

In short

Silfab: Silfab is a solid option, offering 47 panels suitable for both residential and commercial buyers. With an average efficiency of 20.6% and top models reaching 22.9%, their panels deliver competitive performance. As a Tier 1 bankable manufacturer, they offer strong financial backing and long-term reliability.
Common questions
Is Silfab a good solar panel manufacturer?
Silfab offers 47 solar panel models with an average efficiency of 20.6%. They are a Tier 1 bankable manufacturer, recognized by major financial institutions for reliability. Check their full panel lineup on ComparePV to find the best model for your needs.
What types of solar panels does Silfab make?
Silfab manufactures panels ranging from 300W to 640W, covering both residential and commercial applications. Their portfolio includes PERC (45%), N-type (40%), Unknown (13%) cell technologies.
How efficient are Silfab solar panels?
Silfab panels have an average efficiency of 20.6%, with their most efficient model reaching 22.9%. This puts them in the competitive range in the current market.
Does Silfab make bifacial solar panels?
Yes, Silfab offers 14 bifacial panels, representing 30% of their portfolio. Bifacial panels can generate additional energy from the rear side, making them ideal for ground-mounted systems.
What warranty does Silfab offer on their solar panels?
Silfab panels come with an average performance warranty of 30 years. This warranty guarantees that the panels will maintain a specified level of power output over time, protecting your investment against degradation beyond normal levels.
Are Silfab panels good for residential use?
Silfab offers panels in the residential-friendly 380-460W range. For home installations, look for models with high efficiency and compact dimensions to maximize power from limited roof space. Browse their full lineup on ComparePV to filter by power range and specifications.
06

Compared with

Build your own

A brand comparison weighs the two catalogues against each other - what each builds, at what efficiency, and how deep the range goes.

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