Silfab

4.5% of recent U.S. home systems use Silfab solar panels.

Silfab Solar

Status: Operating, but Fort Mill was idled and staff furloughed in Aug 2026 because of material shortages; it expected to resolve this in 3-4 weeks. Also faces local permitting opposition in York County.

Company
Canada (Mississauga, ON); US plants in Washington and South Carolina
U.S. manufacturing
Assembles modules in the U.S. (Bellingham & Burlington, WA (modules); Fort Mill, SC (cells + modules)). Cells: Fort Mill, SC cell line (~1 GW target). Production idled and workers furloughed Aug 2026 because of material shortages
Main products
  • Prime NTC (SIL-420/430/440 QD): 420-440 W, 21.5-22.5%, N-type TOPCon (check datasheet; some retailer listings wrongly say PERC)
  • Elite (SIL-410/420 BG, legacy): 400-420 W, ~21.4-21.9%, Back-contact PERC
Warranty
product years: 25; performance years: 30; end of warranty pct: ~87-90% at yr 30; annual degradation pct: ~0.35-0.4%/yr; labor coverage: Limited removal/reinstall labor reimbursement in the US (confirm dollar cap on current warranty PDF)
PVEL scorecard
Not a 2026 Top Performer. Not on the 2026 list
Price tier
mid
Risks to weigh
  • Fort Mill disruption
  • Smaller company, more exposed to cell supply

Popular US-made domestic-content option.

Checked against 2025–2026 sources. Sources: solarpowerworldonline.com, solarpowerworldonline.com

Silfab solar panels on the CEC certified list

85 certified models, 350–640 W, up to 23.5% efficient. Highest-efficiency models shown. See all models.

ModelWattsEfficiencyTechnologyTemp. coefficient
SIL-540QM54023.5%Mono-c-Si-0.296%/°C
SIL-540XM54023.5%Mono-c-Si-0.294%/°C
SIL-585XM+58523.3%Mono-c-Si-0.3374%/°C
SIL-535QM53523.3%Mono-c-Si-0.296%/°C
SIL-535XM53523.3%Mono-c-Si-0.294%/°C
SIL-440QD44023.3%Mono-c-Si-0.294%/°C
SIL-580XM+58023.1%Mono-c-Si-0.3374%/°C
SIL-530QM53023%Mono-c-Si-0.296%/°C
SIL-530XM53023%Mono-c-Si-0.294%/°C
SIL-435QD43523%Mono-c-Si-0.294%/°C
SIL-640XL64022.9%Mono-c-Si-0.3308%/°C
SIL-575XM+57522.9%Mono-c-Si-0.3374%/°C
Choosing equipmentA well-installed mid-tier system beats a premium brand installed badly. Ask quotes to name exact models, compare warranties in writing, and check that the company backing a 25-year warranty is financially healthy. Compare your quotes.