LONGi Hi-MO X6 Max 470W vs Waaree WS-440
The LONGi Hi-MO X6 Max 470W wins this comparison by a clear margin. It leads in efficiency (22.3% vs 21.8%) and matches or exceeds on warranty (15 vs 12 years). For most residential installations, the LONGi Hi-MO X6 Max 470W is the stronger choice.
Key Differences
- • LONGi Hi-MO X6 Max 470W is rated at 470W while Waaree WS-440 is rated at 440W, a 30W difference.
- • LONGi Hi-MO X6 Max 470W achieves 22.3% efficiency vs 21.8% for the other, a 0.5 percentage point gap.
- • LONGi Hi-MO X6 Max 470W comes with a 15-year product warranty vs 12 years for the other.
- • LONGi Hi-MO X6 Max 470W has a superior temperature coefficient of -0.29%/°C vs -0.3%/°C, retaining more power in hot climates.
Specifications Breakdown
Module Efficiency
The LONGi Hi-MO X6 Max 470W achieves 22.3% module efficiency compared to Waaree WS-440's 21.8%, meaning LONGi Hi-MO X6 Max 470W converts 0.5 percentage points more sunlight into electricity per square meter. In practical terms, the LONGi Hi-MO X6 Max 470W produces 235.2 watts per square meter of panel area while the Waaree WS-440 produces 225.3 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 LONGi Hi-MO X6 Max 470W delivers 470W per panel versus 440W for the Waaree WS-440, a 30W difference per module. To build an 8 kW residential system, you would need 18 LONGi Hi-MO X6 Max 470W panels or 19 Waaree WS-440 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 LONGi Hi-MO X6 Max 470W has a temperature coefficient of -0.29%/°C versus -0.3%/°C for the Waaree WS-440. On a hot summer day when cell temperature reaches 65°C (40°C above the 25°C STC baseline), the LONGi Hi-MO X6 Max 470W retains 94.2% of its rated power while the other retains 94.0%. 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 LONGi Hi-MO X6 Max 470W is backed by a 15-year product warranty and 30-year performance guarantee, while the Waaree WS-440 offers 12-year product and 25-year performance coverage. The LONGi Hi-MO X6 Max 470W provides 3 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 LONGi Hi-MO X6 Max 470W; 1% first year then 0.4%/year for Waaree WS-440), after 25 years the LONGi Hi-MO X6 Max 470W should retain approximately 89.4% of original output versus 89.4% for the Waaree WS-440. The end-of-life output levels are closely matched.
Physical Dimensions & Weight
The LONGi Hi-MO X6 Max 470W measures 1762×1134×30mm and weighs 23.5 kg, while the Waaree WS-440 measures 1722×1134×30mm at 21.5 kg. 2.00 m² of panel area for the LONGi Hi-MO X6 Max 470W versus 1.95 m² for the Waaree WS-440. The Waaree WS-440 is 2.0 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 40 kg. Similar footprints mean both panels fit comparably on standard residential rooftop configurations.
Specification Comparison
| Specification | LONGi Hi-MO X6 Max 470W | Waaree WS-440 |
|---|---|---|
| Power | 470W | 440W |
| Efficiency | 22.3% | 21.8% |
| Power Density | 21.9 W/sq ft | 20.9 W/sq ft |
| Cell Type | TOPCon N-type | TOPCon N-type |
| Bifacial | Yes | No |
| Weight | 23.5 kg | 21.5 kg |
| Temp Coefficient | -0.29%/°C | -0.3%/°C |
| Snow Load | 5400 Pa | 5400 Pa |
| Wind Load | 2400 Pa | 2400 Pa |
| Product Warranty | 15 years | 12 years |
| Performance Warranty | 30 years | 25 years |
| Degradation (Year 1) | 1% | 1% |
| Annual Degradation | 0.4% | 0.4% |
| Country | China | India |
5-Dimension Head-to-Head Analysis
1. Efficiency & Power Density
Winner: LONGi Hi-MO X6 Max 470WThe LONGi Hi-MO X6 Max 470W achieves 22.3% efficiency versus 21.8% — a 0.5 percentage point advantage. On a typical 30-panel residential roof, this translates to approximately 0.9 kW more total system capacity, or 5 kWh more annual production in an average US location.
2. Hot Climate Performance
Winner: LONGi Hi-MO X6 Max 470WThe LONGi Hi-MO X6 Max 470W has a better temperature coefficient of -0.29%/°C versus -0.3%/°C. On a 45°C summer day (20°C above STC), the winner retains 94.2% of rated power versus 94.0%. The difference is modest but accumulates over 25 years of summer production.
3. Durability & Warranty
Winner: LONGi Hi-MO X6 Max 470WLONGi Hi-MO X6 Max 470W leads with a 15-year product warranty versus 12 years. After 25 years, expect 89.4% vs 89.4% of original output for LONGi Hi-MO X6 Max 470W and Waaree WS-440 respectively.
4. Power Output
Winner: LONGi Hi-MO X6 Max 470WThe LONGi Hi-MO X6 Max 470W delivers 470W versus 440W per panel — 30W more. For an 8 kW system, you need 18 panels with the higher-wattage option versus 19 panels, saving 1 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.
LONGi Hi-MO X6 Max 470W
The Hi-MO X6 Max delivers 470W in a mid-size format with N-type TOPCon technology, bridging the gap between compact and large panels.
Pros
- + Mid-size versatility
- + N-type TOPCon efficiency
- + Good power-to-size ratio
- + LONGi reliability
Cons
- - Mid-range pricing
- - Not the highest output
- - Standard warranty
Waaree WS-440
The Waaree WS-440 is a 440W residential-format TOPCon N-type panel in the standard 108-cell configuration, manufactured at Waaree's state-of-the-art facilities in Gujarat, India. At 21.8% efficiency, it competes directly with Chinese TOPCon panels while offering Indian supply chain diversification. The standard 1722 x 1134mm form factor ensures compatibility with all major racking systems. Waaree's rapidly expanding US distribution makes this one of the most accessible Indian-made panels in the North American market.
Pros
- + Indian-manufactured — non-Chinese supply chain alternative
- + 21.8% efficiency competitive with Chinese TOPCon leaders
- + Standard 108-cell residential format — universal racking compatibility
- + -0.30%/°C temp coefficient for hot climate performance
- + Highly competitive pricing — among the lowest-cost TOPCon panels
- + Waaree's expanding US distribution improves availability
Cons
- - 12-year product warranty shorter than 25-year leaders
- - Indian manufacturing quality perception still developing vs established brands
- - US installer familiarity and support network still growing
- - No bifacial option in this residential format
Choose LONGi Hi-MO X6 Max 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
- ✓ Long-term warranty protection is a top priority and you plan to stay in your home for 15+ years
- ✓ You live in a hot climate (Arizona, Texas, Florida) where heat performance matters
- ✓ You prefer newer cell technology with a longer performance improvement runway
Choose Waaree WS-440 If...
- ✓ You prefer newer cell technology with a longer performance improvement runway
- ✓ Cost-conscious residential installers seeking high-efficiency TOPCon panels from a non-Chinese manufacturer at a competitive price point.
Our Recommendation
We recommend the LONGi Hi-MO X6 Max 470W for most buyers in this comparison. It wins 4 of 5 key dimensions and offers a clear advantage in the metrics that matter most for a solar panel purchase. The Waaree WS-440 remains a good product, but the LONGi Hi-MO X6 Max 470W delivers better overall value for the majority of installations.
Frequently Asked Questions
Which is better, LONGi Hi-MO X6 Max 470W or Waaree WS-440?
The LONGi Hi-MO X6 Max 470W wins this comparison by a clear margin. It leads in efficiency (22.3% vs 21.8%) and matches or exceeds on warranty (15 vs 12 years). For most residential installations, the LONGi Hi-MO X6 Max 470W is the stronger choice.
Which panel is more efficient, LONGi Hi-MO X6 Max 470W or Waaree WS-440?
The LONGi Hi-MO X6 Max 470W at 22.3% module efficiency. Higher efficiency means more watts per square foot of roof space, which is critical for space-constrained installations. The difference of 0.5 percentage points translates to approximately 30W per panel under standard test conditions.
Which has a better warranty, LONGi Hi-MO X6 Max 470W or Waaree WS-440?
The LONGi Hi-MO X6 Max 470W comes with a 15-year product warranty and 30-year performance guarantee. The Waaree WS-440 offers 12-year product and 25-year performance warranties. LONGi Hi-MO X6 Max 470W provides 3 additional years of product coverage.
Which panel performs better in hot weather?
The LONGi Hi-MO X6 Max 470W has a temperature coefficient of -0.29%/°C and the Waaree WS-440 is -0.3%/°C. LONGi Hi-MO X6 Max 470W retains more power in heat — important in states like Arizona, Texas, and Florida. A lower (less negative) temperature coefficient is better.
How many LONGi Hi-MO X6 Max 470W vs Waaree WS-440 panels do I need for an 8 kW system?
For an 8 kW system: you need 18 LONGi Hi-MO X6 Max 470W panels (470W each) or 19 Waaree WS-440 panels (440W each). The LONGi Hi-MO X6 Max 470W requires fewer panels, saving on racking hardware and installation labor.
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Last updated: February 2026