REC Group vs Silfab Solar Solar Panels
A side-by-side 2026 comparison of efficiency, price per watt, warranty, and hot-weather performance for REC Group (Premium, 4.6/5) and Silfab Solar (Mid-Range, 4.3/5).
REC Group (Premium, 4.6/5) and Silfab Solar (Mid-Range, 4.3/5) are both proven residential solar panels. REC Group is the more efficient panel, while Silfab Solar costs less per watt.
- Most efficient: REC Group, up to 22.6% (vs 22%).
- Lower price per watt: Silfab Solar, from $0.70/W.
- Longer product warranty: tie at 25 years.
- Better in hot climates: tie on temperature performance.
- Best for: REC Group on small or shaded roofs; Silfab Solar on a tight budget.
How do REC Group and Silfab Solar compare on specs?
The table below puts every key 2026 metric side by side and marks the winner on each row. REC Group leads on efficiency; Silfab Solar leads on price.
| Specification | REC Group | Silfab Solar |
|---|---|---|
| Tier | Premium | Mid-Range |
| Overall rating | 4.6/5✓ | 4.3/5 |
| Max efficiencyHigher is better | 22.6%✓ | 22% |
| Max wattageHigher is better | 470 W✓ | 440 W |
| Price per wattLower is better | $0.80–$1.55 | $0.70–$1.35✓ |
| Product warrantyLonger is better | 25 yr | 25 yr |
| Temperature coefficientCloser to 0 is better | -0.26%/°C | -0.26%/°C |
| Annual degradationLower is better | 0.25% | 0.25% |
| Country | Norway | United States/Canada |
| Founded | 1996 | 2010 |
| Models available | 4 | 4 |
Which is more efficient, REC Group or Silfab Solar?
REC Group is more efficient, converting up to 22.6% of sunlight into electricity versus 22% for Silfab Solar. Higher efficiency produces more watts per square foot, so it matters most on small or partially shaded roofs. On a large, unshaded roof the difference is minor — you can add a panel or two to match output.
Which is cheaper, REC Group or Silfab Solar?
Silfab Solar is the lower-cost option, starting near $0.70 per watt before installation. REC Group ranges $0.80–$1.55/W and Silfab Solar ranges $0.70–$1.35/W. On a typical 6 kW system that price gap works out to a few hundred to a few thousand dollars before incentives like the 30% federal tax credit.
Which performs better in hot weather?
Both panels have similar temperature coefficients, so they lose output at about the same rate in heat. In hot-sun states like Arizona, Texas, and Florida, a better temperature coefficient can mean a few extra percent of summer production.
Which REC Group or Silfab Solar panel should you choose?
- Small or shaded roof: REC Group — higher efficiency fits more power in less space.
- Tight budget / large roof: Silfab Solar — lower price per watt wins when space isn't the constraint.
- Hot climate: either brand — better heat performance protects summer output.
- Longest protection: either brand — a 25-year product warranty.
REC Group
Full review →Pros
- Excellent build quality with patented HJT cell technology
- Strong 25-year product and performance warranty
- Superior low-light and high-temperature performance
- European engineering with rigorous quality control
Cons
- Higher price point than many competitors
- Limited brand awareness in the US compared to SunPower
- Availability can vary by region
Silfab Solar
Full review →Pros
- Made in North America (US and Canada factories)
- High-quality automated manufacturing processes
- Strong product warranty and customer support
- Qualifies for domestic content bonus under IRA
Cons
- Smaller scale than major global manufacturers
- Product lineup is less extensive than larger brands
- Pricing slightly above imported alternatives
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Get Free Solar QuotesREC Group vs Silfab Solar FAQ
REC Group is more efficient (up to 22.6% vs 22%), and Silfab Solar costs less per watt (from $0.70/W). REC Group holds a 4.6/5 rating versus 4.3/5 for Silfab Solar. The better panel depends on whether you prioritize efficiency, price, or warranty.
Silfab Solar is the lower-cost option, starting around $0.70 per watt. REC Group ranges $0.80–$1.55/W and Silfab Solar ranges $0.70–$1.35/W before installation.
REC Group reaches the higher efficiency at 22.6%, compared with 22% for the other. Higher efficiency lets you fit more power on a smaller roof.
Both offer a 25-year product warranty. Lower annual degradation also matters: REC Group degrades about 0.25% per year and Silfab Solar about 0.25%.
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