JA Solar JAM54S31 415W vs Renogy 320W Mono Solar Panel
The JA Solar JAM54S31 415W wins this comparison by a decisive margin. It leads in efficiency (21.5% vs 20.3%) and matches or exceeds on warranty (12 vs 5 years). For most residential installations, the JA Solar JAM54S31 415W is the stronger choice.
Key Differences
- • JA Solar JAM54S31 415W is rated at 415W while Renogy 320W Mono Solar Panel is rated at 320W, a 95W difference.
- • JA Solar JAM54S31 415W achieves 21.5% efficiency vs 20.3% for the other, a 1.2 percentage point gap.
- • JA Solar JAM54S31 415W comes with a 12-year product warranty vs 5 years for the other.
- • JA Solar JAM54S31 415W has a superior temperature coefficient of -0.34%/°C vs -0.35%/°C, retaining more power in hot climates.
- • JA Solar JAM54S31 415W uses PERC Mono cells while Renogy 320W Mono Solar Panel uses Monocrystalline cells, representing different technology generations.
Specifications Breakdown
Module Efficiency
The JA Solar JAM54S31 415W achieves 21.5% module efficiency compared to Renogy 320W Mono Solar Panel's 20.3%, meaning JA Solar JAM54S31 415W converts 1.2 percentage points more sunlight into electricity per square meter. In practical terms, the JA Solar JAM54S31 415W produces 212.5 watts per square meter of panel area while the Renogy 320W Mono Solar Panel produces 293.3 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 JA Solar JAM54S31 415W delivers 415W per panel versus 320W for the Renogy 320W Mono Solar Panel, a 95W difference per module. To build an 8 kW residential system, you would need 20 JA Solar JAM54S31 415W panels or 25 Renogy 320W Mono Solar Panel panels. Choosing the higher-wattage option saves 5 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 JA Solar JAM54S31 415W has a temperature coefficient of -0.34%/°C versus -0.35%/°C for the Renogy 320W Mono Solar Panel. On a hot summer day when cell temperature reaches 65°C (40°C above the 25°C STC baseline), the JA Solar JAM54S31 415W retains 93.2% of its rated power while the other retains 93.0%. 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 JA Solar JAM54S31 415W is backed by a 12-year product warranty and 25-year performance guarantee, while the Renogy 320W Mono Solar Panel offers 5-year product and 25-year performance coverage. The JA Solar JAM54S31 415W provides 7 additional years of defect protection, covering manufacturing issues, material failures, and premature performance loss. Based on their published degradation rates (1.5% first year then 0.5%/year for JA Solar JAM54S31 415W; 2% first year then 0.55%/year for Renogy 320W Mono Solar Panel), after 25 years the JA Solar JAM54S31 415W should retain approximately 86.5% of original output versus 84.8% for the Renogy 320W Mono Solar Panel. This 1.7 percentage point gap in end-of-life output meaningfully impacts lifetime energy economics.
Physical Dimensions & Weight
The JA Solar JAM54S31 415W measures 1722×1134×30mm and weighs 21.5 kg, while the Renogy 320W Mono Solar Panel measures 1638×666×35mm at 18.5 kg. 1.95 m² of panel area for the JA Solar JAM54S31 415W versus 1.09 m² for the Renogy 320W Mono Solar Panel. The Renogy 320W Mono Solar Panel 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. The more compact Renogy 320W Mono Solar Panel may be easier to fit on irregularly shaped or space-limited rooftops.
Specification Comparison
| Specification | JA Solar JAM54S31 415W | Renogy 320W Mono Solar Panel |
|---|---|---|
| Power | 415W | 320W |
| Efficiency | 21.5% | 20.3% |
| Power Density | 19.7 W/sq ft | 27.3 W/sq ft |
| Cell Type | PERC Mono | Monocrystalline |
| Bifacial | No | No |
| Weight | 21.5 kg | 18.5 kg |
| Temp Coefficient | -0.34%/°C | -0.35%/°C |
| Snow Load | 5400 Pa | 5400 Pa |
| Wind Load | 2400 Pa | 2400 Pa |
| Product Warranty | 12 years | 5 years |
| Performance Warranty | 25 years | 25 years |
| Degradation (Year 1) | 1.5% | 2% |
| Annual Degradation | 0.5% | 0.55% |
| Country | China | China |
5-Dimension Head-to-Head Analysis
1. Efficiency & Power Density
Winner: JA Solar JAM54S31 415WThe JA Solar JAM54S31 415W achieves 21.5% efficiency versus 20.3% — a 1.2 percentage point advantage. On a typical 30-panel residential roof, this translates to approximately 2.9 kW more total system capacity, or 13 kWh more annual production in an average US location.
2. Hot Climate Performance
Winner: JA Solar JAM54S31 415WThe JA Solar JAM54S31 415W has a better temperature coefficient of -0.34%/°C versus -0.35%/°C. On a 45°C summer day (20°C above STC), the winner retains 93.2% of rated power versus 93.0%. The difference is modest but accumulates over 25 years of summer production.
3. Durability & Warranty
Winner: JA Solar JAM54S31 415WJA Solar JAM54S31 415W leads with a 12-year product warranty versus 5 years. JA Solar JAM54S31 415W degrades more slowly at 0.5% per year versus 0.55%. After 25 years, expect 86.5% vs 84.8% of original output for JA Solar JAM54S31 415W and Renogy 320W Mono Solar Panel respectively.
4. Power Output
Winner: JA Solar JAM54S31 415WThe JA Solar JAM54S31 415W delivers 415W versus 320W per panel — 95W more. For an 8 kW system, you need 20 panels with the higher-wattage option versus 25 panels, saving 5 panels and the associated racking and labor costs.
5. Cell Technology
Winner: Renogy 320W Mono Solar PanelThe JA Solar JAM54S31 415W uses PERC Mono: PERC (Passivated Emitter Rear Cell) is the current mainstream technology, offering good efficiency at the lowest manufacturing cost. The Renogy 320W Mono Solar Panel uses Monocrystalline: Monocrystalline. Monocrystalline represents a newer generation technology with a longer performance runway as manufacturing matures.
JA Solar JAM54S31 415W
The JAM54S31 is a compact residential PERC panel delivering 415W with a solid balance of performance and affordability.
Pros
- + Compact residential form factor
- + Good price-performance ratio
- + Widely available
- + Proven reliability
Cons
- - Lower efficiency vs N-type
- - Higher degradation rate
- - Standard warranty
Renogy 320W Mono Solar Panel
The Renogy 320W Mono Solar Panel is a versatile mid-power panel suitable for both residential rooftop and off-grid ground-mount installations, delivering 320W with proven monocrystalline technology.
Pros
- + Versatile for residential and off-grid use
- + UL 1703 certified for building-mounted installations
- + Competitive price at $0.62-0.78/W
- + Half-cut cell design reduces shading losses
- + Manageable weight at 18.5 kg
Cons
- - 20.3% efficiency below premium panels
- - 5-year material warranty shorter than Tier 1 brands
- - Standard monocrystalline (not N-Type or TOPCon)
- - Higher degradation rate than N-Type alternatives
Choose JA Solar JAM54S31 415W 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
- ✓ Long-term warranty protection is a top priority and you plan to stay in your home for 12+ years
- ✓ 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
Choose Renogy 320W Mono Solar Panel If...
- ✓ Budget-conscious homeowners and off-grid builders needing a reliable, certified mid-power panel.
Our Recommendation
The JA Solar JAM54S31 415W is the decisive winner in this solar panel comparison, outperforming the Renogy 320W Mono Solar Panel in 4 of 5 dimensions. Unless you have a specific requirement that the Renogy 320W Mono Solar Panel uniquely addresses, the JA Solar JAM54S31 415W is the stronger choice for virtually every installation scenario.
Frequently Asked Questions
Which is better, JA Solar JAM54S31 415W or Renogy 320W Mono Solar Panel?
The JA Solar JAM54S31 415W wins this comparison by a decisive margin. It leads in efficiency (21.5% vs 20.3%) and matches or exceeds on warranty (12 vs 5 years). For most residential installations, the JA Solar JAM54S31 415W is the stronger choice.
Which panel is more efficient, JA Solar JAM54S31 415W or Renogy 320W Mono Solar Panel?
The JA Solar JAM54S31 415W at 21.5% module efficiency. Higher efficiency means more watts per square foot of roof space, which is critical for space-constrained installations. The difference of 1.2 percentage points translates to approximately 95W per panel under standard test conditions.
Which has a better warranty, JA Solar JAM54S31 415W or Renogy 320W Mono Solar Panel?
The JA Solar JAM54S31 415W comes with a 12-year product warranty and 25-year performance guarantee. The Renogy 320W Mono Solar Panel offers 5-year product and 25-year performance warranties. JA Solar JAM54S31 415W provides 7 additional years of product coverage.
Which panel performs better in hot weather?
The JA Solar JAM54S31 415W has a temperature coefficient of -0.34%/°C and the Renogy 320W Mono Solar Panel is -0.35%/°C. JA Solar JAM54S31 415W retains more power in heat — important in states like Arizona, Texas, and Florida. A lower (less negative) temperature coefficient is better.
How many JA Solar JAM54S31 415W vs Renogy 320W Mono Solar Panel panels do I need for an 8 kW system?
For an 8 kW system: you need 20 JA Solar JAM54S31 415W panels (415W each) or 25 Renogy 320W Mono Solar Panel panels (320W each). The JA Solar JAM54S31 415W requires fewer panels, saving on racking hardware and installation labor.
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Last updated: February 2026