LONGi vs REC Group Solar Panels
A side-by-side 2026 comparison of efficiency, price per watt, warranty, and hot-weather performance for LONGi (Mid-Range, 4.3/5) and REC Group (Premium, 4.6/5).
LONGi (Mid-Range, 4.3/5) and REC Group (Premium, 4.6/5) are both proven residential solar panels. LONGi is the more efficient panel, while LONGi costs less per watt.
- Most efficient: LONGi, up to 22.8% (vs 22.6%).
- Lower price per watt: LONGi, from $0.42/W.
- Longer product warranty: REC Group, 25 years.
- Better in hot climates: tie on temperature performance.
- Best for: LONGi on small or shaded roofs; LONGi on a tight budget.
How do LONGi and REC Group compare on specs?
The table below puts every key 2026 metric side by side and marks the winner on each row. LONGi leads on efficiency; LONGi leads on price.
| Specification | LONGi | REC Group |
|---|---|---|
| Tier | Mid-Range | Premium |
| Overall rating | 4.3/5 | 4.6/5✓ |
| Max efficiencyHigher is better | 22.8%✓ | 22.6% |
| Max wattageHigher is better | 580 W✓ | 470 W |
| Price per wattLower is better | $0.42–$0.85✓ | $0.80–$1.55 |
| Product warrantyLonger is better | 15 yr | 25 yr✓ |
| Temperature coefficientCloser to 0 is better | -0.26%/°C | -0.26%/°C |
| Annual degradationLower is better | 0.35% | 0.25%✓ |
| Country | China | Norway |
| Founded | 2000 | 1996 |
| Models available | 4 | 4 |
Which is more efficient, LONGi or REC Group?
LONGi is more efficient, converting up to 22.8% of sunlight into electricity versus 22.6% for REC Group. 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, LONGi or REC Group?
LONGi is the lower-cost option, starting near $0.42 per watt before installation. LONGi ranges $0.42–$0.85/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 LONGi or REC Group panel should you choose?
- Small or shaded roof: LONGi — higher efficiency fits more power in less space.
- Tight budget / large roof: LONGi — lower price per watt wins when space isn't the constraint.
- Hot climate: either brand — better heat performance protects summer output.
- Longest protection: REC Group — 25-year product warranty.
LONGi
Full review →Pros
- World leader in monocrystalline silicon technology
- Vertically integrated supply chain ensures quality control
- Hi-MO series offers excellent power output and efficiency
- Massive R&D investment drives continuous innovation
Cons
- Primarily focused on large-format commercial/utility modules
- US residential presence still growing compared to established brands
- Some geopolitical supply chain concerns
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 QuotesLONGi vs REC Group FAQ
LONGi is more efficient (up to 22.8% vs 22.6%), and LONGi costs less per watt (from $0.42/W). LONGi holds a 4.3/5 rating versus 4.6/5 for REC Group. The better panel depends on whether you prioritize efficiency, price, or warranty.
LONGi is the lower-cost option, starting around $0.42 per watt. LONGi ranges $0.42–$0.85/W and REC Group ranges $0.80–$1.55/W before installation.
LONGi reaches the higher efficiency at 22.8%, compared with 22.6% for the other. Higher efficiency lets you fit more power on a smaller roof.
REC Group offers the longer product warranty at 25 years. Lower annual degradation also matters: LONGi degrades about 0.35% per year and REC Group about 0.25%.
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