Silfab Review 2026
Silfab manufactures 4 models across solar panels. Efficiency range 20.4%–21.8%.
Headquartered in United States · Manufacturing in United States
Founded 1995 · Headquartered in Mississauga, Ontario, Canada
Parent company: Silfab Solar Inc. (private)
Silfab at a glance
Certifications: IEC 61215 · IEC 61730 · UL 1703 · CEC Listed · Buy American Act · ARRA-compliant
Warranty: 25-yr product · 30-yr performance
Key milestones
- 1995 Founded in Canada
- 2018 Opened US factory in Bellingham, Washington
- 2024 Opened second US factory in Burlington, Washington (cell + module production)
Source: www.silfab.solar/about · Last updated 2026-05-27
Silfab Pros & Cons (data-driven)
+ Pros
- ✓ Average panel efficiency 21.2% exceeds industry baseline 21%
- ✓ Average product warranty 25yr exceeds industry baseline 12yr
- ✓ Low annual degradation 0.4%/yr (industry average ~0.5%/yr)
- ✓ US manufacturing available (Buy American / domestic content benefits)
− Cons
- ✗ Distributor and installer pricing varies — direct retail rarely available
- ✗ Some 2026 models depend on regional distributor availability
Pros and cons calculated against industry baselines: 21% panel efficiency, 12yr panel warranty, -0.32%/°C temp coeff, 90% battery RTE.
Current Silfab Product List (4)
Solar Panels (4)
| Model | Wattage | Efficiency | Warranty | Verified | Score | Details |
|---|---|---|---|---|---|---|
| SIL-500-NX 500W | 500W | 21.8% | 25/30 yr | — | 94 (A) | View → |
| Elite SIL-420 | 420W | 21.5% | 25/30 yr | ✓ | 97 (A) | View → |
| SIL-410-BG 410W | 410W | 21.2% | 25/30 yr | ✓ | 93 (A) | View → |
| SIL-370-BK 370W | 370W | 20.4% | 25/25 yr | ✓ | 85 (B+) | View → |
Spec Sheet Downloads
3 manufacturer-published datasheets available for Silfab products. All links go to the official PDF on the manufacturer's website.
- PDF Silfab SIL-410-BG 410W datasheet →https://silfabsolar.com/wp-content/uploads/2025/06/Silfab-SIL-410-BG-Data-Final.pdf
- PDF Silfab SIL-370-BK 370W datasheet →https://silfabsolar.com/wp-content/uploads/2024/09/Silfab-SIL-370-BK-Data-Generic-20240829-Final.pdf
- PDF Silfab Elite SIL-420 datasheet →https://silfabsolar.com/wp-content/uploads/2025/12/Silfab-SIL-420-BG-Data-Final.pdf
Recent Silfab News
SolarSpec does not republish third-party news. For the latest Silfab news — product launches, financial filings, recalls, supply-chain updates — search Google News directly.
Search Silfab news on Google News →Related Brands
Brands with comparable SolarSpec scores in similar product categories.
Frequently Asked Questions
What is the SolarSpec Score for Silfab?
Silfab earns a SolarSpec Score of 92/100 (Grade A) based on the weighted average of all 4 models in their 2026 lineup. The score combines efficiency, warranty, temperature coefficient, and verification status. See our /methodology/ page for the full formula.
How many solar products does Silfab offer in 2026?
Silfab offers 4 products in their 2026 lineup: 4 solar panels.
What is the most efficient Silfab solar panel?
The most efficient Silfab solar panel is the SIL-500-NX 500W at 21.8% efficiency with 500W output. Silfab panels range from 20.4% to 21.8% efficiency across 4 models.
What warranty does Silfab offer on solar panels?
Silfab offers up to 25-year product warranty and up to 30-year performance warranty. Average annual degradation across the lineup is 0.4%.
Where are Silfab solar panels manufactured?
Silfab solar panels are manufactured in United States.
Where can I download Silfab datasheets?
We have direct manufacturer-published datasheet links for 3 of 4 Silfab products. See the Spec Sheet Downloads section below for direct PDF links.
How we score brands
Every Silfab model in our catalog is scored 0-100 using a transparent formula: efficiency (25 pts), product warranty (20 pts), performance warranty bonus (3 pts), temperature coefficient (12 pts), and datasheet verification (5 pts), on a 50-point baseline. The brand-level score is the simple average across all 4 models.
Read the full SolarSpec methodology →