REC Alpha Pure-RX 470W vs Meyer Burger White 400W
The REC Alpha Pure-RX 470W wins this comparison by a narrow margin. It leads in efficiency (22.6% vs 21.7%) and matches or exceeds on warranty (25 vs 25 years). For most residential installations, the REC Alpha Pure-RX 470W is the stronger choice.
Key Differences
- • REC Alpha Pure-RX 470W is rated at 470W while Meyer Burger White 400W is rated at 400W, a 70W difference.
- • REC Alpha Pure-RX 470W achieves 22.6% efficiency vs 21.7% for the other, a 0.9 percentage point gap.
- • Both carry matching 25-year product warranties.
- • REC Alpha Pure-RX 470W has a superior temperature coefficient of -0.24%/°C vs -0.26%/°C, retaining more power in hot climates.
- • REC Alpha Pure-RX 470W uses HJT (Heterojunction) cells while Meyer Burger White 400W uses HJT (Heterojunction) N-type cells, representing different technology generations.
Specifications Breakdown
Module Efficiency
The REC Alpha Pure-RX 470W achieves 22.6% module efficiency compared to Meyer Burger White 400W's 21.7%, meaning REC Alpha Pure-RX 470W converts 0.9 percentage points more sunlight into electricity per square meter. In practical terms, the REC Alpha Pure-RX 470W produces 225.7 watts per square meter of panel area while the Meyer Burger White 400W produces 204.8 W/m². For rooftop installations where space is limited, this efficiency gap determines how many kilowatts you can fit on your available roof area. Over a 25-year system life, even a small efficiency advantage compounds into meaningful additional energy production.
Power Output
The REC Alpha Pure-RX 470W delivers 470W per panel versus 400W for the Meyer Burger White 400W, a 70W difference per module. To build an 8 kW residential system, you would need 18 REC Alpha Pure-RX 470W panels or 20 Meyer Burger White 400W panels. Choosing the higher-wattage option saves 2 panels, reducing total racking hardware, wiring, and installation labor costs. Higher wattage per panel is particularly valuable for commercial-scale installations where panel count directly impacts balance-of-system costs.
Temperature Coefficient
The REC Alpha Pure-RX 470W has a temperature coefficient of -0.24%/°C versus -0.26%/°C for the Meyer Burger White 400W. On a hot summer day when cell temperature reaches 65°C (40°C above the 25°C STC baseline), the REC Alpha Pure-RX 470W retains 95.2% of its rated power while the other retains 94.8%. While the numerical gap is modest, it still accumulates over decades of summer production, especially in southern latitudes with prolonged peak heat hours.
Warranty Coverage
The REC Alpha Pure-RX 470W is backed by a 25-year product warranty and 25-year performance guarantee, while the Meyer Burger White 400W offers 25-year product and 30-year performance coverage. Both offer identical product warranty duration. Based on their published degradation rates (0.5% first year then 0.35%/year for REC Alpha Pure-RX 470W; 1% first year then 0.25%/year for Meyer Burger White 400W), after 25 years the REC Alpha Pure-RX 470W should retain approximately 91.1% of original output versus 93.0% for the Meyer Burger White 400W. This 1.9 percentage point gap in end-of-life output meaningfully impacts lifetime energy economics.
Physical Dimensions & Weight
The REC Alpha Pure-RX 470W measures 1728×1205×30mm and weighs 22.7 kg, while the Meyer Burger White 400W measures 1722×1134×35mm at 21 kg. 2.08 m² of panel area for the REC Alpha Pure-RX 470W versus 1.95 m² for the Meyer Burger White 400W. Their weights are closely matched, so neither panel imposes a significantly different structural load on the mounting system. The more compact Meyer Burger White 400W may be easier to fit on irregularly shaped or space-limited rooftops.
Specification Comparison
| Specification | REC Alpha Pure-RX 470W | Meyer Burger White 400W |
|---|---|---|
| Power | 470W | 400W |
| Efficiency | 22.6% | 21.7% |
| Power Density | 21.0 W/sq ft | 19.0 W/sq ft |
| Cell Type | HJT (Heterojunction) | HJT (Heterojunction) N-type |
| Bifacial | Yes | No |
| Weight | 22.7 kg | 21 kg |
| Temp Coefficient | -0.24%/°C | -0.26%/°C |
| Snow Load | 5400 Pa | 5400 Pa |
| Wind Load | 3600 Pa | 2400 Pa |
| Product Warranty | 25 years | 25 years |
| Performance Warranty | 25 years | 30 years |
| Degradation (Year 1) | 0.5% | 1% |
| Annual Degradation | 0.35% | 0.25% |
| Country | Singapore | Germany |
5-Dimension Head-to-Head Analysis
1. Efficiency & Power Density
Winner: REC Alpha Pure-RX 470WThe REC Alpha Pure-RX 470W achieves 22.6% efficiency versus 21.7% — a 0.9 percentage point advantage. On a typical 30-panel residential roof, this translates to approximately 2.1 kW more total system capacity, or 10 kWh more annual production in an average US location.
2. Hot Climate Performance
Winner: REC Alpha Pure-RX 470WThe REC Alpha Pure-RX 470W has a better temperature coefficient of -0.24%/°C versus -0.26%/°C. On a 45°C summer day (20°C above STC), the winner retains 95.2% of rated power versus 94.8%. The difference is modest but accumulates over 25 years of summer production.
3. Durability & Warranty
Winner: Meyer Burger White 400WMeyer Burger White 400W degrades more slowly at 0.25% per year versus 0.35%. After 25 years, expect 91.1% vs 93.0% of original output for REC Alpha Pure-RX 470W and Meyer Burger White 400W respectively.
4. Power Output
Winner: REC Alpha Pure-RX 470WThe REC Alpha Pure-RX 470W delivers 470W versus 400W per panel — 70W more. For an 8 kW system, you need 18 panels with the higher-wattage option versus 20 panels, saving 2 panels and the associated racking and labor costs.
5. Cell Technology
Winner: TieThe REC Alpha Pure-RX 470W uses HJT (Heterojunction): HJT (Heterojunction) combines crystalline silicon with amorphous silicon layers, delivering the best temperature coefficient and bifacial gains, but at higher manufacturing cost. The Meyer Burger White 400W uses HJT (Heterojunction) N-type: HJT (Heterojunction) combines crystalline silicon with amorphous silicon layers, delivering the best temperature coefficient and bifacial gains, but at higher manufacturing cost. Both are equivalent-generation technologies.
REC Alpha Pure-RX 470W
The REC Alpha Pure-RX features advanced HJT cells delivering 470W with an industry-leading 25-year product warranty and exceptional temperature performance. Performance warranty guarantees 92% at year 25.
Pros
- + Industry-leading 25-year product warranty
- + Excellent -0.24%/°C temp coefficient
- + HJT technology for superior longevity
- + Lead-free REC Pure soldering
Cons
- - Premium pricing
- - Limited production capacity
- - Specialized dimensions
Meyer Burger White 400W
The Meyer Burger White 400W is a premium heterojunction (HJT) panel manufactured in Germany, featuring an industry-leading -0.26%/°C temperature coefficient that delivers superior energy yield in hot climates. The HJT cell architecture provides excellent low-light performance and bifacial-ready construction. Meyer Burger's 25-year product warranty and 30-year performance guarantee (92% at year 30) reflect confidence in their proprietary SmartWire Connection Technology (SWCT). A premium European-manufactured alternative to Asian-produced panels.
Pros
- + Industry-leading -0.26%/°C temperature coefficient — best-in-class hot climate performance
- + Made in Germany with European quality standards
- + 25-year product warranty — among the longest in the industry
- + 30-year performance warranty with only 0.25% annual degradation
- + HJT technology delivers excellent low-light and cloudy day performance
- + Bifacial-ready construction for additional energy gain
Cons
- - Premium pricing — $0.50-$0.60/W vs $0.25-$0.35/W for mainstream panels
- - 400W output is modest by current standards
- - Limited US distribution and installer familiarity
- - Meyer Burger has faced financial challenges affecting supply stability
Choose REC Alpha Pure-RX 470W If...
- ✓ Your roof space is limited and you need maximum power per panel
- ✓ You want fewer panels to reach your target system size, reducing racking and labor costs
- ✓ You live in a hot climate (Arizona, Texas, Florida) where heat performance matters
- ✓ You prefer newer cell technology with a longer performance improvement runway
- ✓ Homeowners in hot climates who prioritize warranty and long-term performance.
Choose Meyer Burger White 400W If...
- ✓ You want maximum output retention over the system's 25-30 year lifespan
- ✓ You prefer newer cell technology with a longer performance improvement runway
- ✓ Quality-focused homeowners in hot climates who want European-manufactured HJT panels with the best temperature performance and longest warranties available.
Our Recommendation
Both the REC Alpha Pure-RX 470W and Meyer Burger White 400W are excellent solar panel options, and the margin between them is narrow. The REC Alpha Pure-RX 470W wins 3 of 5 comparison dimensions by a slim margin. Your decision may come down to local pricing, installer availability, and which specific performance metrics matter most for your project. Either product is a solid investment.
Frequently Asked Questions
Which is better, REC Alpha Pure-RX 470W or Meyer Burger White 400W?
The REC Alpha Pure-RX 470W wins this comparison by a narrow margin. It leads in efficiency (22.6% vs 21.7%) and matches or exceeds on warranty (25 vs 25 years). For most residential installations, the REC Alpha Pure-RX 470W is the stronger choice.
Which panel is more efficient, REC Alpha Pure-RX 470W or Meyer Burger White 400W?
The REC Alpha Pure-RX 470W at 22.6% module efficiency. Higher efficiency means more watts per square foot of roof space, which is critical for space-constrained installations. The difference of 0.9 percentage points translates to approximately 70W per panel under standard test conditions.
Which has a better warranty, REC Alpha Pure-RX 470W or Meyer Burger White 400W?
The REC Alpha Pure-RX 470W comes with a 25-year product warranty and 25-year performance guarantee. The Meyer Burger White 400W offers 25-year product and 30-year performance warranties. Both offer identical warranty terms.
Which panel performs better in hot weather?
The REC Alpha Pure-RX 470W has a temperature coefficient of -0.24%/°C and the Meyer Burger White 400W is -0.26%/°C. REC Alpha Pure-RX 470W retains more power in heat — important in states like Arizona, Texas, and Florida. A lower (less negative) temperature coefficient is better.
How many REC Alpha Pure-RX 470W vs Meyer Burger White 400W panels do I need for an 8 kW system?
For an 8 kW system: you need 18 REC Alpha Pure-RX 470W panels (470W each) or 20 Meyer Burger White 400W panels (400W each). The REC Alpha Pure-RX 470W requires fewer panels, saving on racking hardware and installation labor.
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Last updated: February 2026