JA Solar JAM78S30 590W vs Hanwha Q.TRON G11S 410W
The Hanwha Q.TRON G11S 410W wins this comparison by a narrow margin. It offers better long-term durability with 25-year warranty. For most residential installations, the Hanwha Q.TRON G11S 410W is the stronger choice.
Key Differences
- • JA Solar JAM78S30 590W is rated at 590W while Hanwha Q.TRON G11S 410W is rated at 410W, a 180W difference.
- • JA Solar JAM78S30 590W achieves 22.6% efficiency vs 21.3% for the other, a 1.3 percentage point gap.
- • Hanwha Q.TRON G11S 410W comes with a 25-year product warranty vs 15 years for the other.
- • JA Solar JAM78S30 590W has a superior temperature coefficient of -0.28%/°C vs -0.29%/°C, retaining more power in hot climates.
Specifications Breakdown
Module Efficiency
The JA Solar JAM78S30 590W achieves 22.6% module efficiency compared to Hanwha Q.TRON G11S 410W's 21.3%, meaning JA Solar JAM78S30 590W converts 1.3 percentage points more sunlight into electricity per square meter. In practical terms, the JA Solar JAM78S30 590W produces 218.2 watts per square meter of panel area while the Hanwha Q.TRON G11S 410W produces 210.0 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 JAM78S30 590W delivers 590W per panel versus 410W for the Hanwha Q.TRON G11S 410W, a 180W difference per module. To build an 8 kW residential system, you would need 14 JA Solar JAM78S30 590W panels or 20 Hanwha Q.TRON G11S 410W panels. Choosing the higher-wattage option saves 6 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 JAM78S30 590W has a temperature coefficient of -0.28%/°C versus -0.29%/°C for the Hanwha Q.TRON G11S 410W. On a hot summer day when cell temperature reaches 65°C (40°C above the 25°C STC baseline), the JA Solar JAM78S30 590W retains 94.4% of its rated power while the other retains 94.2%. 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 JAM78S30 590W is backed by a 15-year product warranty and 30-year performance guarantee, while the Hanwha Q.TRON G11S 410W offers 25-year product and 25-year performance coverage. The Hanwha Q.TRON G11S 410W provides 10 additional years of defect protection, covering manufacturing issues, material failures, and premature performance loss. Based on their published degradation rates (1% first year then 0.4%/year for JA Solar JAM78S30 590W; 1% first year then 0.4%/year for Hanwha Q.TRON G11S 410W), after 25 years the JA Solar JAM78S30 590W should retain approximately 89.4% of original output versus 89.4% for the Hanwha Q.TRON G11S 410W. The end-of-life output levels are closely matched.
Physical Dimensions & Weight
The JA Solar JAM78S30 590W measures 2384×1134×35mm and weighs 31 kg, while the Hanwha Q.TRON G11S 410W measures 1722×1134×30mm at 20.8 kg. 2.70 m² of panel area for the JA Solar JAM78S30 590W versus 1.95 m² for the Hanwha Q.TRON G11S 410W. The Hanwha Q.TRON G11S 410W is 10.2 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 204 kg. The more compact Hanwha Q.TRON G11S 410W may be easier to fit on irregularly shaped or space-limited rooftops.
Specification Comparison
| Specification | JA Solar JAM78S30 590W | Hanwha Q.TRON G11S 410W |
|---|---|---|
| Power | 590W | 410W |
| Efficiency | 22.6% | 21.3% |
| Power Density | 20.3 W/sq ft | 19.5 W/sq ft |
| Cell Type | TOPCon N-type | TOPCon N-type |
| Bifacial | No | No |
| Weight | 31 kg | 20.8 kg |
| Temp Coefficient | -0.28%/°C | -0.29%/°C |
| Snow Load | 5400 Pa | 5400 Pa |
| Wind Load | 2400 Pa | 2400 Pa |
| Product Warranty | 15 years | 25 years |
| Performance Warranty | 30 years | 25 years |
| Degradation (Year 1) | 1% | 1% |
| Annual Degradation | 0.4% | 0.4% |
| Country | China | South Korea |
5-Dimension Head-to-Head Analysis
1. Efficiency & Power Density
Winner: JA Solar JAM78S30 590WThe JA Solar JAM78S30 590W achieves 22.6% efficiency versus 21.3% — a 1.3 percentage point advantage. On a typical 30-panel residential roof, this translates to approximately 5.4 kW more total system capacity, or 25 kWh more annual production in an average US location.
2. Hot Climate Performance
Winner: JA Solar JAM78S30 590WThe JA Solar JAM78S30 590W has a better temperature coefficient of -0.28%/°C versus -0.29%/°C. On a 45°C summer day (20°C above STC), the winner retains 94.4% of rated power versus 94.2%. The difference is modest but accumulates over 25 years of summer production.
3. Durability & Warranty
Winner: Hanwha Q.TRON G11S 410WHanwha Q.TRON G11S 410W leads with a 25-year product warranty versus 15 years. After 25 years, expect 89.4% vs 89.4% of original output for JA Solar JAM78S30 590W and Hanwha Q.TRON G11S 410W respectively.
4. Power Output
Winner: JA Solar JAM78S30 590WThe JA Solar JAM78S30 590W delivers 590W versus 410W per panel — 180W more. For an 8 kW system, you need 14 panels with the higher-wattage option versus 20 panels, saving 6 panels and the associated racking and labor costs.
5. Cell Technology
Winner: TieBoth panels use TOPCon N-type cell technology. No technology advantage for either product.
JA Solar JAM78S30 590W
JA Solar's JAM78S30 is a high-wattage N-type TOPCon module achieving 22.6% efficiency for large-scale installations.
Pros
- + Very high 590W output
- + Excellent efficiency
- + Low temperature coefficient
- + Bifacial design
Cons
- - Very large and heavy
- - Requires heavy-duty mounting
- - Not for small roofs
Hanwha Q.TRON G11S 410W
The Hanwha Q.TRON G11S delivers 410W N-type TOPCon performance in a compact residential format with a strong 25-year warranty.
Pros
- + 25-year product warranty
- + N-type TOPCon cells
- + Compact size
- + Korean quality
Cons
- - Moderate wattage
- - Premium pricing
- - Limited color options
Choose JA Solar JAM78S30 590W 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
- ✓ Large commercial or ground-mount systems requiring maximum output.
Choose Hanwha Q.TRON G11S 410W If...
- ✓ Long-term warranty protection is a top priority and you plan to stay in your home for 25+ years
- ✓ You prefer newer cell technology with a longer performance improvement runway
- ✓ Residential installations valuing Korean quality with strong warranty.
Our Recommendation
Both the JA Solar JAM78S30 590W and Hanwha Q.TRON G11S 410W are excellent solar panel options, and the margin between them is narrow. The Hanwha Q.TRON G11S 410W wins 1 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, JA Solar JAM78S30 590W or Hanwha Q.TRON G11S 410W?
The Hanwha Q.TRON G11S 410W wins this comparison by a narrow margin. It offers better long-term durability with 25-year warranty. For most residential installations, the Hanwha Q.TRON G11S 410W is the stronger choice.
Which panel is more efficient, JA Solar JAM78S30 590W or Hanwha Q.TRON G11S 410W?
The JA Solar JAM78S30 590W 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 1.3 percentage points translates to approximately 180W per panel under standard test conditions.
Which has a better warranty, JA Solar JAM78S30 590W or Hanwha Q.TRON G11S 410W?
The JA Solar JAM78S30 590W comes with a 15-year product warranty and 30-year performance guarantee. The Hanwha Q.TRON G11S 410W offers 25-year product and 25-year performance warranties. Hanwha Q.TRON G11S 410W provides 10 additional years of product coverage.
Which panel performs better in hot weather?
The JA Solar JAM78S30 590W has a temperature coefficient of -0.28%/°C and the Hanwha Q.TRON G11S 410W is -0.29%/°C. JA Solar JAM78S30 590W 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 JAM78S30 590W vs Hanwha Q.TRON G11S 410W panels do I need for an 8 kW system?
For an 8 kW system: you need 14 JA Solar JAM78S30 590W panels (590W each) or 20 Hanwha Q.TRON G11S 410W panels (410W each). The JA Solar JAM78S30 590W requires fewer panels, saving on racking hardware and installation labor.
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Last updated: February 2026