Head to Head
REC vs. Silfab vs. Qcells: Specs Side by Side
| Spec | REC Alpha Pure-RX | Silfab SIL-440 | Qcells Q.TRON |
|---|---|---|---|
| Wattage (top model) | 460W | 440W | 435W |
| Efficiency | Up to 22.5% | Up to 22.0% | Up to 22.5% |
| Temperature Coefficient | -0.24%/°C | Not disclosed to same spec tier | -0.34%/°C |
| Product Warranty | 25 years | 30 years | 25 years |
| Year-25 Performance Guarantee | 92% | 85.1% (82.6% at year 30) | 86% |
| Manufacturing | Norway-engineered, global production | North America | South Korea / global production |
Which Is Right for You
Which Panel Should You Choose?
- Choose REC if you want maximum efficiency, especially on a tight roof where every watt per square foot counts. This is Solphos’s flagship panel.
- Choose Silfab if warranty length and North American manufacturing matter most to you.
- Choose Qcells if you want strong, dependable performance at a price point below either premium option.
What Solphos Installs
Why Solphos Installs REC as Our Flagship Panel
Solphos’s standard equipment package pairs REC panels with Enphase microinverters, our best-in-class combination for efficiency and reliability on Western Washington roofs. If your project calls for a different fit, whether that’s Silfab’s warranty or Qcells’ pricing, we can source and install those brands too. Every proposal starts with a LiDAR-based production estimate specific to your roof, not a generic sales pitch. You can review REC’s full Alpha Pure-RX datasheet directly from the manufacturer.
Frequently Asked Questions
REC vs Silfab vs Qcells, which is best?
It depends on what you’re optimizing for. REC Alpha Pure-RX leads on raw efficiency and is what Solphos installs as our flagship panel. Silfab carries the longest warranty at 30 years and is manufactured in North America. Qcells offers strong performance at a lower price point than either premium option.
Which solar panel brand has the longest warranty?
Silfab, with a 30-year product and performance warranty on its SIL-440 series, compared to 25 years for REC and Qcells.
Which solar panel brand is most efficient?
REC’s Alpha Pure-RX leads this comparison at up to 22.5% efficiency, ahead of Silfab’s roughly 22.0% and Qcells’ roughly 22.5% on its top Q.TRON models.
What solar panels does Solphos install?
REC is our flagship panel, paired with Enphase microinverters as our standard best-in-class equipment package. We can source Silfab or Qcells for specific roof, budget, or warranty priorities on request.
Ready to Compare Panels for Your Roof?
Get a free, no-pressure quote and equipment recommendation for your home in Seattle or the Eastside.
