Does Silfab's NA manufacturing qualify for the IRA domestic content bonus?

Silfab's Bellingham, WA and Toronto, Canada facilities qualify for IRA domestic content bonus consideration under IRS Notice 2023-29. Canada qualifies under USMCA. However, domestic content rules also evaluate US-manufactured component costs, not just assembly location. Always verify with your installer and tax professional before claiming the 10% bonus.

What is Silfab's pricing range compared to imported panels?

Silfab panels are priced at $3.20–3.80/W installed — premium versus imported Chinese panels at $2.20–2.80/W. This 30–40% premium is partially offset by the IRA domestic content 10% bonus ($3,000–$5,000 on a 10 kW system), the 30-year product warranty, and simplified warranty service. For buyers who value North American manufacturing, the net financial gap is narrower than the sticker price suggests.

Silfab Solar Panels Calculator

North American-made solar panels with the industry's longest 30-year product warranty. Select Prime BG 460W bifacial, Prime XM 410W, or Elite BK 380W black panel — get panel count, IRA domestic content 40% ITC, 30-year production model, and payback period.

Silfab model & system inputs

Silfab model?

Usable roof area?

sqft

Target system size?

Peak sun hours (PSH)?

hrs/day

Electricity rate?

$/kWh

Made in North America — IRA domestic content +10% ITC bonus eligible

Prime XM 410W (21.4%) — Standard residential — best value Silfab with 21.4% efficiency and industry-leading 30-year product warranty

Manufactured in: Bellingham, WA / Toronto, CA

Silfab Solar results

Roof size warning

Roof too small for 25 panels — max 24 panels (9.8 kW) fit. Reduce target kW or choose a higher-wattage model.

Metric	TOPCon Monofacial
Panels needed	25 panels @ 410W
Actual system size	10.25 kW
Roof fit check	No — reduce to 24 panels
Panel efficiency	21.4%
Manufacturing location	Bellingham, WA / Toronto, CA
ITC rate	30% standard
System cost range	$29,725 – $35,875
ITC tax credit	$9,840
Net cost after ITC	$22,960
Year 1 production	14,965 kWh/yr
25-year total production	347,510 kWh
30-year total production	412,433 kWh
Annual savings	$2,694/yr
25-year savings	$62,552
30-year savings	$74,238
Simple payback (after ITC)	8.5 years
Temperature coefficient	-0.3%/°C
Hot day output loss (35°C rise)	10.5%
Annual degradation rate	0.45%/yr
Year 25 output remaining	87.9%
Year 30 output remaining	86.0%
Product warranty	30 years (industry-leading)
Performance warranty	30 years

Link copied to clipboard

How to Use This Calculator

Select your Silfab panel model

Silfab Solar produces three core residential and commercial panel lines. The Prime BG 460W is a bifacial TOPCon panel for ground mounts and commercial rooftops. The Prime XM 410W is the standard residential workhorse — 21.4% efficiency with the best warranty in the residential market. The Elite BK 380W delivers a full-black aesthetic for homeowners who want minimal visual impact on their roof. All three are manufactured in Bellingham, Washington or Toronto, Canada — qualifying for the IRA domestic content bonus.

Enter roof area, target size, PSH, and electricity rate

The calculator checks whether your desired system fits your available roof area. Enter south-facing roof square footage, target kW, your location's peak sun hours, and your electricity rate. Silfab panels carry a 0.45%/yr annual degradation rate — better than standard PERC panels (0.55%/yr), backed by a 30-year product and 30-year performance warranty.

Toggle North America manufacturing for IRA bonus

All three Silfab models are manufactured in North America. Enabling this toggle applies the IRA domestic content +10% ITC bonus, bringing total federal tax credit to 40%. This is one of the strongest financial arguments for choosing Silfab over lower-cost imported alternatives — the bonus alone saves $3,000–$5,000 on a typical 10 kW system.

The Formula

Panel Area (sqft) = Panel Watts ÷ (Efficiency ÷ 100) ÷ 1000 × 10.764 Max Panels by Roof = ⌊Roof sqft ÷ Panel Area⌋ Panels Needed = ⌈Target kW × 1000 ÷ Panel Watts⌉ Year 1 Production = System kW × PSH × 365 × 0.80 × Bifacial Bonus Year N Production = Year 1 × (1 − 0.45%/yr)^N × (1 − 2% first-year) 30-year Production = Sum of Year 1 through Year 30 with 0.45%/yr ITC = Gross Cost × 30% (or 40% with NA domestic content) Net Cost = Gross Cost − ITC

Silfab's 30-year product warranty is unique in the residential solar market — most manufacturers offer 12 or 25 years. This covers manufacturing defects for the same duration as the performance warranty, meaning if panels fail early, they are replaced without cost. The 30-year performance warranty guarantees at least 86% of rated output at year 30 under a linear degradation schedule.

Example

Priya — 10 kW, North America IRA bonus, Pacific Northwest, 500 sqft

Priya is in Seattle, WA (3.8 PSH) paying $0.13/kWh and wants to support North American manufacturing while maximizing her federal tax credit. She selects the Prime XM 410W with the NA preference toggle enabled.

Panel modelPrime XM 410W

Roof area500 sqft

Target system10 kW

Peak sun hours3.8 hrs/day

Electricity rate$0.13/kWh

NA toggleOn (40% ITC)

Results

Panels needed25 panels (10.25 kW actual)

Roof fitYes — fits in 500 sqft

System cost range~$29,700 – $36,100

ITC (40%)~$13,160

Net cost after ITC~$19,740

Year 1 production~11,270 kWh

25-year production~265,000 kWh

Annual savings~$1,465/yr

Simple payback~13.5 years

Seattle's lower PSH extends payback compared to Sun Belt installs, but the 40% ITC saves Priya ~$3,290 compared to 30% alone. The 30-year product warranty means that for the entire system life, manufacturing defects are covered — a meaningful risk reduction in a rainy climate where panel integrity matters. Silfab's Canadian proximity ensures strong installer support in the Pacific Northwest.

Silfab Model Comparison

Spec	Prime BG 460W	Prime XM 410W	Elite BK 380W
Efficiency	22.0%	21.4%	20.4%
Technology	TOPCon Bifacial	TOPCon Mono	TOPCon Black
Degradation/yr	0.45%	0.45%	0.45%
Product warranty	30 years	30 years	30 years
Performance warranty	30 years	30 years	30 years
Made in NA	Bellingham, WA	WA / Toronto	Bellingham, WA
$/W approx.	$3.20–3.80	$2.90–3.50	$3.50–4.10

FAQ

Why does Silfab offer a 30-year product warranty when most brands offer 12–25 years? ▼

Silfab's 30-year product (manufacturing defect) warranty is the longest in residential solar — most manufacturers offer 12 years (entry-level) or 25 years (premium). This warranty covers panel failures due to manufacturing defects for the entire life of a typical solar installation. Silfab can offer this extended warranty because they manufacture in North America under stringent quality controls and do not need to factor in long international logistics chains or customs delays for warranty replacements. For homeowners in regions with harsh climates (hail, snow, salt air), a 30-year product warranty provides meaningful risk reduction compared to competitors.

Does Silfab's NA manufacturing actually qualify for the IRA domestic content bonus? ▼

Silfab's Bellingham, Washington and Toronto, Canada facilities qualify for the domestic content bonus under IRS Notice 2023-29 and subsequent IRA guidance. The panels must be assembled in the US or a US Free Trade Agreement country (Canada qualifies under USMCA). However, domestic content rules also consider the cost of US-manufactured components — cell wafers, glass, frame — not just final assembly. Silfab sources components from multiple suppliers, and qualification percentages can vary by production lot. Always verify with your installer and tax professional that your specific panels meet the current domestic content threshold before claiming the bonus on your tax return.

Is Silfab Solar a financially stable company? ▼

Silfab Solar is a privately held company founded in 2010 with operations in Bellingham, WA and Toronto, Canada. They are Bloomberg NEF Tier 1 listed and have consistently shipped panels to US and Canadian residential markets. Being privately held means less public financial transparency than NYSE/NASDAQ-listed manufacturers. However, their North American manufacturing base and consistent Tier 1 status are positive indicators of financial stability. For long-term warranty confidence, consider that Silfab's North American presence means warranty claims are handled domestically rather than requiring international resolution — a practical advantage over offshore manufacturers.

How does Silfab compare to Q CELLS as a US/Canada-made option? ▼

Both Silfab and Q CELLS manufacture in North America and qualify for IRA domestic content bonuses. Key differences: Silfab has a longer product warranty (30 vs 25 years), slightly lower efficiency models, and higher $/W pricing. Q CELLS has 0.30%/yr degradation (vs Silfab's 0.45%/yr) — significantly better long-term output — and a larger market presence with more installers familiar with the brand. For maximum long-run kWh production, Q CELLS wins on degradation. For longest product warranty coverage, Silfab wins. For homeowners who prioritize the all-black aesthetic in North American manufacturing, Silfab Elite BK is unique in the market.

Related Calculators

Embed This Calculator

Free to embed on your website. Just copy this code:

<iframe src="https://solarsizecalculator.com/silfab-solar-panels-calculator"
  width="100%" height="750" frameborder="0"
  title="Silfab Solar Panels Calculator"></iframe>