Maxeon Maxeon 7 470W vs Waaree WS-440
The Maxeon Maxeon 7 470W wins this comparison by a decisive margin. It leads in efficiency (22.8% vs 21.8%) and matches or exceeds on warranty (40 vs 12 years). For most residential installations, the Maxeon Maxeon 7 470W is the stronger choice.
Key Differences
- • Maxeon Maxeon 7 470W is rated at 470W while Waaree WS-440 is rated at 440W, a 30W difference.
- • Maxeon Maxeon 7 470W achieves 22.8% efficiency vs 21.8% for the other, a 1.0 percentage point gap.
- • Maxeon Maxeon 7 470W comes with a 40-year product warranty vs 12 years for the other.
- • Maxeon Maxeon 7 470W has a superior temperature coefficient of -0.27%/°C vs -0.3%/°C, retaining more power in hot climates.
- • Maxeon Maxeon 7 470W uses IBC (Interdigitated Back Contact) cells while Waaree WS-440 uses TOPCon N-type cells, representing different technology generations.
Specifications Breakdown
Module Efficiency
The Maxeon Maxeon 7 470W achieves 22.8% module efficiency compared to Waaree WS-440's 21.8%, meaning Maxeon Maxeon 7 470W converts 1.0 percentage points more sunlight into electricity per square meter. In practical terms, the Maxeon Maxeon 7 470W produces 243.3 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 Maxeon Maxeon 7 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 Maxeon Maxeon 7 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 Maxeon Maxeon 7 470W has a temperature coefficient of -0.27%/°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 Maxeon Maxeon 7 470W retains 94.6% 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 Maxeon Maxeon 7 470W is backed by a 40-year product warranty and 40-year performance guarantee, while the Waaree WS-440 offers 12-year product and 25-year performance coverage. The Maxeon Maxeon 7 470W provides 28 additional years of defect protection, covering manufacturing issues, material failures, and premature performance loss. Based on their published degradation rates (0.25% first year then 0.25%/year for Maxeon Maxeon 7 470W; 1% first year then 0.4%/year for Waaree WS-440), after 25 years the Maxeon Maxeon 7 470W should retain approximately 93.8% of original output versus 89.4% for the Waaree WS-440. This 4.4 percentage point gap in end-of-life output meaningfully impacts lifetime energy economics.
Physical Dimensions & Weight
The Maxeon Maxeon 7 470W measures 1872×1032×30mm and weighs 21 kg, while the Waaree WS-440 measures 1722×1134×30mm at 21.5 kg. 1.93 m² of panel area for the Maxeon Maxeon 7 470W versus 1.95 m² for the Waaree WS-440. Their weights are closely matched, so neither panel imposes a significantly different structural load on the mounting system. Similar footprints mean both panels fit comparably on standard residential rooftop configurations.
Specification Comparison
| Specification | Maxeon Maxeon 7 470W | Waaree WS-440 |
|---|---|---|
| Power | 470W | 440W |
| Efficiency | 22.8% | 21.8% |
| Power Density | 22.6 W/sq ft | 20.9 W/sq ft |
| Cell Type | IBC (Interdigitated Back Contact) | TOPCon N-type |
| Bifacial | Yes | No |
| Weight | 21 kg | 21.5 kg |
| Temp Coefficient | -0.27%/°C | -0.3%/°C |
| Snow Load | 5400 Pa | 5400 Pa |
| Wind Load | 3600 Pa | 2400 Pa |
| Product Warranty | 40 years | 12 years |
| Performance Warranty | 40 years | 25 years |
| Degradation (Year 1) | 0.25% | 1% |
| Annual Degradation | 0.25% | 0.4% |
| Country | Malaysia | India |
5-Dimension Head-to-Head Analysis
1. Efficiency & Power Density
Winner: Maxeon Maxeon 7 470WThe Maxeon Maxeon 7 470W achieves 22.8% efficiency versus 21.8% — a 1.0 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: Maxeon Maxeon 7 470WThe Maxeon Maxeon 7 470W has a better temperature coefficient of -0.27%/°C versus -0.3%/°C. On a 45°C summer day (20°C above STC), the winner retains 94.6% of rated power versus 94.0%. The difference is modest but accumulates over 25 years of summer production.
3. Durability & Warranty
Winner: Maxeon Maxeon 7 470WMaxeon Maxeon 7 470W leads with a 40-year product warranty versus 12 years. Maxeon Maxeon 7 470W degrades more slowly at 0.25% per year versus 0.4%. After 25 years, expect 93.8% vs 89.4% of original output for Maxeon Maxeon 7 470W and Waaree WS-440 respectively.
4. Power Output
Winner: Maxeon Maxeon 7 470WThe Maxeon Maxeon 7 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: Maxeon Maxeon 7 470WThe Maxeon Maxeon 7 470W uses IBC (Interdigitated Back Contact): IBC (Interdigitated Back Contact) moves all electrical contacts to the rear of the cell, maximizing front-side light capture for the highest possible efficiency. The Waaree WS-440 uses TOPCon N-type: TOPCon (Tunnel Oxide Passivated Contact) adds a thin tunnel oxide layer to reduce recombination losses, achieving higher efficiency than PERC while being manufacturable on existing production lines. IBC (Interdigitated Back Contact) represents a newer generation technology with a longer performance runway as manufacturing matures.
Maxeon Maxeon 7 470W
The Maxeon 7 470W uses fifth-generation IBC (Interdigitated Back Contact) cells that are 65% larger than previous generations, achieving 22.8% panel efficiency with an industry-leading 40-year warranty and the lowest degradation rate in the industry (0.25%/year). The patented back-contact copper foundation provides exceptional crack resistance and eliminates front-surface gridlines for a clean all-black aesthetic. Cradle to Cradle Certified Silver. Note: US availability limited since July 2024 due to CBP detentions.
Pros
- + 22.8% efficiency with Gen 5 IBC back-contact cells — no front gridlines
- + Industry-leading 40-year warranty with 1-in-20,000 historical failure rate
- + Lowest degradation: 0.25%/year, guaranteed 88.25% output at year 40
- + Copper-backed cells maintain conductivity even if silicon cracks
- + Cradle to Cradle Certified Silver sustainability credential
Cons
- - Premium pricing at ~$3.35/W (40-80% more than mainstream panels)
- - US availability severely limited since July 2024 CBP detentions
- - Maxeon is independent from bankrupt SunPower but faces financial pressures
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 Maxeon Maxeon 7 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 40+ 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 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
The Maxeon Maxeon 7 470W is the decisive winner in this solar panel comparison, outperforming the Waaree WS-440 in 5 of 5 dimensions. Unless you have a specific requirement that the Waaree WS-440 uniquely addresses, the Maxeon Maxeon 7 470W is the stronger choice for virtually every installation scenario.
Frequently Asked Questions
Which is better, Maxeon Maxeon 7 470W or Waaree WS-440?
The Maxeon Maxeon 7 470W wins this comparison by a decisive margin. It leads in efficiency (22.8% vs 21.8%) and matches or exceeds on warranty (40 vs 12 years). For most residential installations, the Maxeon Maxeon 7 470W is the stronger choice.
Which panel is more efficient, Maxeon Maxeon 7 470W or Waaree WS-440?
The Maxeon Maxeon 7 470W at 22.8% module efficiency. Higher efficiency means more watts per square foot of roof space, which is critical for space-constrained installations. The difference of 1.0 percentage points translates to approximately 30W per panel under standard test conditions.
Which has a better warranty, Maxeon Maxeon 7 470W or Waaree WS-440?
The Maxeon Maxeon 7 470W comes with a 40-year product warranty and 40-year performance guarantee. The Waaree WS-440 offers 12-year product and 25-year performance warranties. Maxeon Maxeon 7 470W provides 28 additional years of product coverage.
Which panel performs better in hot weather?
The Maxeon Maxeon 7 470W has a temperature coefficient of -0.27%/°C and the Waaree WS-440 is -0.3%/°C. Maxeon Maxeon 7 470W retains more power in heat — important in states like Arizona, Texas, and Florida. A lower (less negative) temperature coefficient is better.
How many Maxeon Maxeon 7 470W vs Waaree WS-440 panels do I need for an 8 kW system?
For an 8 kW system: you need 18 Maxeon Maxeon 7 470W panels (470W each) or 19 Waaree WS-440 panels (440W each). The Maxeon Maxeon 7 470W requires fewer panels, saving on racking hardware and installation labor.
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Last updated: February 2026