Panasonic vs REC Group Solar Panels
A side-by-side 2026 comparison of efficiency, price per watt, warranty, and hot-weather performance for Panasonic (Premium, 4.5/5) and REC Group (Premium, 4.6/5).
Panasonic (Premium, 4.5/5) and REC Group (Premium, 4.6/5) are both proven residential solar panels. REC Group is the more efficient panel, while REC Group costs less per watt.
- Most efficient: REC Group, up to 22.6% (vs 22.2%).
- Lower price per watt: REC Group, from $0.80/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; REC Group on a tight budget.
How do Panasonic and REC Group 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; REC Group leads on price.
| Specification | Panasonic | REC Group |
|---|---|---|
| Tier | Premium | Premium |
| Overall rating | 4.5/5 | 4.6/5✓ |
| Max efficiencyHigher is better | 22.2% | 22.6%✓ |
| Max wattageHigher is better | 410 W | 470 W✓ |
| Price per wattLower is better | $0.95–$1.55 | $0.80–$1.55✓ |
| 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 | Japan | Norway |
| Founded | 1918 | 1996 |
| Models available | 3 | 4 |
Which is more efficient, Panasonic or REC Group?
REC Group is more efficient, converting up to 22.6% of sunlight into electricity versus 22.2% for Panasonic. 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, Panasonic or REC Group?
REC Group is the lower-cost option, starting near $0.80 per watt before installation. Panasonic ranges $0.95–$1.55/W and REC Group ranges $0.80–$1.55/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 Panasonic or REC Group panel should you choose?
- Small or shaded roof: REC Group — higher efficiency fits more power in less space.
- Tight budget / large roof: REC Group — 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.
Panasonic
Full review →Pros
- Exceptional temperature coefficient for hot climates
- HJT cell technology delivers superior real-world performance
- Trusted global brand with decades of manufacturing experience
- Strong warranty coverage and reliability track record
Cons
- Premium pricing compared to many Chinese manufacturers
- Smaller product lineup than some competitors
- Panel availability can fluctuate in certain markets
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
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Get Free Solar QuotesPanasonic vs REC Group FAQ
REC Group is more efficient (up to 22.6% vs 22.2%), and REC Group costs less per watt (from $0.80/W). Panasonic holds a 4.5/5 rating versus 4.6/5 for REC Group. The better panel depends on whether you prioritize efficiency, price, or warranty.
REC Group is the lower-cost option, starting around $0.80 per watt. Panasonic ranges $0.95–$1.55/W and REC Group ranges $0.80–$1.55/W before installation.
REC Group reaches the higher efficiency at 22.6%, compared with 22.2% 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: Panasonic degrades about 0.25% per year and REC Group about 0.25%.
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