JA Solar JAM78S30 590W vs JinkoSolar Tiger Neo S 430W
The JA Solar JAM78S30 590W wins this comparison by a clear margin. It leads in efficiency (22.6% vs 22%) and matches or exceeds on warranty (15 vs 15 years). For most residential installations, the JA Solar JAM78S30 590W is the stronger choice.
Key Differences
- • JA Solar JAM78S30 590W is rated at 590W while JinkoSolar Tiger Neo S 430W is rated at 430W, a 160W difference.
- • JA Solar JAM78S30 590W achieves 22.6% efficiency vs 22% for the other, a 0.6 percentage point gap.
- • Both carry matching 15-year product warranties.
- • 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 JinkoSolar Tiger Neo S 430W's 22%, meaning JA Solar JAM78S30 590W converts 0.6 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 JinkoSolar Tiger Neo S 430W produces 220.2 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 430W for the JinkoSolar Tiger Neo S 430W, a 160W difference per module. To build an 8 kW residential system, you would need 14 JA Solar JAM78S30 590W panels or 19 JinkoSolar Tiger Neo S 430W 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 JAM78S30 590W has a temperature coefficient of -0.28%/°C versus -0.29%/°C for the JinkoSolar Tiger Neo S 430W. 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 JinkoSolar Tiger Neo S 430W offers 15-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 JA Solar JAM78S30 590W; 1% first year then 0.4%/year for JinkoSolar Tiger Neo S 430W), after 25 years the JA Solar JAM78S30 590W should retain approximately 89.4% of original output versus 89.4% for the JinkoSolar Tiger Neo S 430W. 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 JinkoSolar Tiger Neo S 430W measures 1722×1134×30mm at 21 kg. 2.70 m² of panel area for the JA Solar JAM78S30 590W versus 1.95 m² for the JinkoSolar Tiger Neo S 430W. The JinkoSolar Tiger Neo S 430W is 10.0 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 200 kg. The more compact JinkoSolar Tiger Neo S 430W may be easier to fit on irregularly shaped or space-limited rooftops.
Specification Comparison
| Specification | JA Solar JAM78S30 590W | JinkoSolar Tiger Neo S 430W |
|---|---|---|
| Power | 590W | 430W |
| Efficiency | 22.6% | 22% |
| Power Density | 20.3 W/sq ft | 20.5 W/sq ft |
| Cell Type | TOPCon N-type | TOPCon N-type |
| Bifacial | No | Yes |
| Weight | 31 kg | 21 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 | 15 years |
| Performance Warranty | 30 years | 30 years |
| Degradation (Year 1) | 1% | 1% |
| Annual Degradation | 0.4% | 0.4% |
| Country | China | China |
5-Dimension Head-to-Head Analysis
1. Efficiency & Power Density
Winner: JA Solar JAM78S30 590WThe JA Solar JAM78S30 590W achieves 22.6% efficiency versus 22% — a 0.6 percentage point advantage. On a typical 30-panel residential roof, this translates to approximately 4.8 kW more total system capacity, or 22 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: TieBoth panels offer identical 15-year product warranties and 0.4% annual degradation. Neither has a durability advantage.
4. Power Output
Winner: JA Solar JAM78S30 590WThe JA Solar JAM78S30 590W delivers 590W versus 430W per panel — 160W more. For an 8 kW system, you need 14 panels with the higher-wattage option versus 19 panels, saving 5 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
JinkoSolar Tiger Neo S 430W
The Tiger Neo S is JinkoSolar's compact N-type residential panel, delivering 430W in a space-efficient format for standard roof sizes.
Pros
- + Compact N-type panel
- + Good residential size
- + JinkoSolar quality
- + 30-year warranty
Cons
- - Lower wattage vs larger models
- - Moderate efficiency
- - Standard sizing
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 JinkoSolar Tiger Neo S 430W If...
- ✓ You prefer newer cell technology with a longer performance improvement runway
- ✓ Standard residential rooftops wanting compact N-type performance from JinkoSolar.
Our Recommendation
We recommend the JA Solar JAM78S30 590W for most buyers in this comparison. It wins 3 of 5 key dimensions and offers a clear advantage in the metrics that matter most for a solar panel purchase. The JinkoSolar Tiger Neo S 430W remains a good product, but the JA Solar JAM78S30 590W delivers better overall value for the majority of installations.
Frequently Asked Questions
Which is better, JA Solar JAM78S30 590W or JinkoSolar Tiger Neo S 430W?
The JA Solar JAM78S30 590W wins this comparison by a clear margin. It leads in efficiency (22.6% vs 22%) and matches or exceeds on warranty (15 vs 15 years). For most residential installations, the JA Solar JAM78S30 590W is the stronger choice.
Which panel is more efficient, JA Solar JAM78S30 590W or JinkoSolar Tiger Neo S 430W?
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 0.6 percentage points translates to approximately 160W per panel under standard test conditions.
Which has a better warranty, JA Solar JAM78S30 590W or JinkoSolar Tiger Neo S 430W?
The JA Solar JAM78S30 590W comes with a 15-year product warranty and 30-year performance guarantee. The JinkoSolar Tiger Neo S 430W offers 15-year product and 30-year performance warranties. Both offer identical warranty terms.
Which panel performs better in hot weather?
The JA Solar JAM78S30 590W has a temperature coefficient of -0.28%/°C and the JinkoSolar Tiger Neo S 430W 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 JinkoSolar Tiger Neo S 430W 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 19 JinkoSolar Tiger Neo S 430W panels (430W each). The JA Solar JAM78S30 590W requires fewer panels, saving on racking hardware and installation labor.
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Last updated: February 2026