Silfab SIL-370-BK 370W vs Meyer Burger Glass 390W
The Meyer Burger Glass 390W wins this comparison by a decisive margin. It leads in efficiency (21.2% vs 20.4%) and matches or exceeds on warranty (25 vs 25 years). For most residential installations, the Meyer Burger Glass 390W is the stronger choice.
Key Differences
- • Silfab SIL-370-BK 370W is rated at 370W while Meyer Burger Glass 390W is rated at 390W, a 20W difference.
- • Meyer Burger Glass 390W achieves 21.2% efficiency vs 20.4% for the other, a 0.8 percentage point gap.
- • Both carry matching 25-year product warranties.
- • Meyer Burger Glass 390W has a superior temperature coefficient of -0.26%/°C vs -0.35%/°C, retaining more power in hot climates.
- • Silfab SIL-370-BK 370W uses PERC Mono cells while Meyer Burger Glass 390W uses HJT (Heterojunction) N-type cells, representing different technology generations.
Specifications Breakdown
Module Efficiency
The Meyer Burger Glass 390W achieves 21.2% module efficiency compared to Silfab SIL-370-BK 370W's 20.4%, meaning Meyer Burger Glass 390W converts 0.8 percentage points more sunlight into electricity per square meter. In practical terms, the Silfab SIL-370-BK 370W produces 189.5 watts per square meter of panel area while the Meyer Burger Glass 390W produces 199.7 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 Meyer Burger Glass 390W delivers 390W per panel versus 370W for the Silfab SIL-370-BK 370W, a 20W difference per module. To build an 8 kW residential system, you would need 22 Silfab SIL-370-BK 370W panels or 21 Meyer Burger Glass 390W panels. Choosing the higher-wattage option saves 1 panel, 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 Meyer Burger Glass 390W has a temperature coefficient of -0.26%/°C versus -0.35%/°C for the Silfab SIL-370-BK 370W. On a hot summer day when cell temperature reaches 65°C (40°C above the 25°C STC baseline), the Meyer Burger Glass 390W retains 94.8% of its rated power while the other retains 93.0%. This difference is particularly significant in hot climates such as the American Southwest, the Middle East, and Southeast Asia, where panels routinely operate 30-40°C above STC for several hours each day. Over the system lifetime, the cumulative energy advantage from a better temperature coefficient can amount to 2-4% of total production.
Warranty Coverage
The Silfab SIL-370-BK 370W is backed by a 25-year product warranty and 25-year performance guarantee, while the Meyer Burger Glass 390W offers 25-year product and 30-year performance coverage. Both offer identical product warranty duration. Based on their published degradation rates (1% first year then 0.4%/year for Silfab SIL-370-BK 370W; 1% first year then 0.25%/year for Meyer Burger Glass 390W), after 25 years the Silfab SIL-370-BK 370W should retain approximately 89.4% of original output versus 93.0% for the Meyer Burger Glass 390W. This 3.6 percentage point gap in end-of-life output meaningfully impacts lifetime energy economics.
Physical Dimensions & Weight
The Silfab SIL-370-BK 370W measures 1722×1134×30mm and weighs 19.5 kg, while the Meyer Burger Glass 390W measures 1722×1134×35mm at 22.5 kg. 1.95 m² of panel area for the Silfab SIL-370-BK 370W versus 1.95 m² for the Meyer Burger Glass 390W. The Silfab SIL-370-BK 370W is 3.0 kg lighter per panel, which reduces structural load requirements on the roof and makes handling easier during installation. For a 20-panel system, that is a total weight difference of 60 kg. Similar footprints mean both panels fit comparably on standard residential rooftop configurations.
Specification Comparison
| Specification | Silfab SIL-370-BK 370W | Meyer Burger Glass 390W |
|---|---|---|
| Power | 370W | 390W |
| Efficiency | 20.4% | 21.2% |
| Power Density | 17.6 W/sq ft | 18.6 W/sq ft |
| Cell Type | PERC Mono | HJT (Heterojunction) N-type |
| Bifacial | No | No |
| Weight | 19.5 kg | 22.5 kg |
| Temp Coefficient | -0.35%/°C | -0.26%/°C |
| Snow Load | 2400 Pa | 5400 Pa |
| Wind Load | 2400 Pa | 2400 Pa |
| Product Warranty | 25 years | 25 years |
| Performance Warranty | 25 years | 30 years |
| Degradation (Year 1) | 1% | 1% |
| Annual Degradation | 0.4% | 0.25% |
| Country | United States | Germany |
5-Dimension Head-to-Head Analysis
1. Efficiency & Power Density
Winner: Meyer Burger Glass 390WThe Meyer Burger Glass 390W achieves 21.2% efficiency versus 20.4% — a 0.8 percentage point advantage. On a typical 30-panel residential roof, this translates to approximately 0.6 kW more total system capacity, or 3 kWh more annual production in an average US location.
2. Hot Climate Performance
Winner: Meyer Burger Glass 390WThe Meyer Burger Glass 390W has a better temperature coefficient of -0.26%/°C versus -0.35%/°C. On a 45°C summer day (20°C above STC), the winner retains 94.8% of rated power versus 93.0%. This is a meaningful difference in hot states like Arizona, Texas, and Florida.
3. Durability & Warranty
Winner: Meyer Burger Glass 390WMeyer Burger Glass 390W degrades more slowly at 0.25% per year versus 0.4%. After 25 years, expect 89.4% vs 93.0% of original output for Silfab SIL-370-BK 370W and Meyer Burger Glass 390W respectively.
4. Power Output
Winner: Meyer Burger Glass 390WThe Meyer Burger Glass 390W delivers 390W versus 370W per panel — 20W more. For an 8 kW system, you need 21 panels with the higher-wattage option versus 22 panels, saving 1 panels and the associated racking and labor costs.
5. Cell Technology
Winner: Meyer Burger Glass 390WThe Silfab SIL-370-BK 370W uses PERC Mono: PERC (Passivated Emitter Rear Cell) is the current mainstream technology, offering good efficiency at the lowest manufacturing cost. The Meyer Burger Glass 390W 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. HJT (Heterojunction) N-type represents a newer generation technology with a longer performance runway as manufacturing matures.
Silfab SIL-370-BK 370W
The SIL-370-BK is Silfab's entry-level US-made all-black panel delivering 370W for budget-conscious domestic installations.
Pros
- + Made in USA
- + All-black design
- + 25-year warranty
- + ARRA compliant
Cons
- - Lower wattage
- - Basic PERC technology
- - Less competitive efficiency
Meyer Burger Glass 390W
The Meyer Burger Glass 390W is the all-black aesthetic variant of Meyer Burger's premium HJT panel line, featuring a glass-glass construction for enhanced durability and fire resistance. The all-black appearance (black frame, black backsheet) makes it ideal for residential installations where aesthetics matter. It shares the same industry-leading -0.26%/°C temperature coefficient and SmartWire Connection Technology as the White series, with the glass-glass build adding mechanical strength and improved PID resistance.
Pros
- + Sleek all-black aesthetics for residential curb appeal
- + Glass-glass construction for enhanced durability and fire resistance
- + -0.26%/°C temperature coefficient — same industry-leading thermal performance
- + Made in Germany with 25+30 year warranty coverage
- + Improved PID resistance from glass-glass construction
- + HJT cells deliver excellent low-light performance
Cons
- - 390W slightly lower output than White variant due to all-black design
- - Glass-glass construction adds 1.5 kg weight per panel
- - Higher price premium for aesthetic all-black finish
- - Limited US availability and installer network
Choose Silfab SIL-370-BK 370W If...
- ✓ Government or institutional projects requiring ARRA/Buy America compliance.
Choose Meyer Burger Glass 390W 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 want maximum output retention over the system's 25-30 year lifespan
- ✓ You prefer newer cell technology with a longer performance improvement runway
Our Recommendation
The Meyer Burger Glass 390W is the decisive winner in this solar panel comparison, outperforming the Silfab SIL-370-BK 370W in 5 of 5 dimensions. Unless you have a specific requirement that the Silfab SIL-370-BK 370W uniquely addresses, the Meyer Burger Glass 390W is the stronger choice for virtually every installation scenario.
Frequently Asked Questions
Which is better, Silfab SIL-370-BK 370W or Meyer Burger Glass 390W?
The Meyer Burger Glass 390W wins this comparison by a decisive margin. It leads in efficiency (21.2% vs 20.4%) and matches or exceeds on warranty (25 vs 25 years). For most residential installations, the Meyer Burger Glass 390W is the stronger choice.
Which panel is more efficient, Silfab SIL-370-BK 370W or Meyer Burger Glass 390W?
The Meyer Burger Glass 390W at 21.2% module efficiency. Higher efficiency means more watts per square foot of roof space, which is critical for space-constrained installations. The difference of 0.8 percentage points translates to approximately 20W per panel under standard test conditions.
Which has a better warranty, Silfab SIL-370-BK 370W or Meyer Burger Glass 390W?
The Silfab SIL-370-BK 370W comes with a 25-year product warranty and 25-year performance guarantee. The Meyer Burger Glass 390W offers 25-year product and 30-year performance warranties. Both offer identical warranty terms.
Which panel performs better in hot weather?
The Silfab SIL-370-BK 370W has a temperature coefficient of -0.35%/°C and the Meyer Burger Glass 390W is -0.26%/°C. Meyer Burger Glass 390W retains more power in heat — important in states like Arizona, Texas, and Florida. A lower (less negative) temperature coefficient is better.
How many Silfab SIL-370-BK 370W vs Meyer Burger Glass 390W panels do I need for an 8 kW system?
For an 8 kW system: you need 22 Silfab SIL-370-BK 370W panels (370W each) or 21 Meyer Burger Glass 390W panels (390W each). The Meyer Burger Glass 390W requires fewer panels, saving on racking hardware and installation labor.
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Last updated: February 2026