CertainTeed Solstice Solar Panel 365W vs Tesla Solar Roof Tile
The CertainTeed Solstice Solar Panel 365W wins this comparison by a decisive margin. It leads in efficiency (19.9% vs 15.5%). For most residential installations, the CertainTeed Solstice Solar Panel 365W is the stronger choice.
Key Differences
- • CertainTeed Solstice Solar Panel 365W is rated at 365W while Tesla Solar Roof Tile is rated at 71.67W, a 293.33W difference.
- • CertainTeed Solstice Solar Panel 365W achieves 19.9% efficiency vs 15.5% for the other, a 4.4 percentage point gap.
- • Tesla Solar Roof Tile comes with a 25-year product warranty vs 10 years for the other.
- • CertainTeed Solstice Solar Panel 365W has a superior temperature coefficient of -0.36%/°C vs -0.4%/°C, retaining more power in hot climates.
- • CertainTeed Solstice Solar Panel 365W uses Monocrystalline PERC cells while Tesla Solar Roof Tile uses Monocrystalline cells, representing different technology generations.
Specifications Breakdown
Module Efficiency
The CertainTeed Solstice Solar Panel 365W achieves 19.9% module efficiency compared to Tesla Solar Roof Tile's 15.5%, meaning CertainTeed Solstice Solar Panel 365W converts 4.4 percentage points more sunlight into electricity per square meter. In practical terms, the CertainTeed Solstice Solar Panel 365W produces 199.2 watts per square meter of panel area while the Tesla Solar Roof Tile produces 164.6 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 CertainTeed Solstice Solar Panel 365W delivers 365W per panel versus 71.67W for the Tesla Solar Roof Tile, a 293.33W difference per module. To build an 8 kW residential system, you would need 22 CertainTeed Solstice Solar Panel 365W panels or 112 Tesla Solar Roof Tile panels. Choosing the higher-wattage option saves 90 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 CertainTeed Solstice Solar Panel 365W has a temperature coefficient of -0.36%/°C versus -0.4%/°C for the Tesla Solar Roof Tile. On a hot summer day when cell temperature reaches 65°C (40°C above the 25°C STC baseline), the CertainTeed Solstice Solar Panel 365W retains 92.8% of its rated power while the other retains 92.0%. 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 CertainTeed Solstice Solar Panel 365W is backed by a 10-year product warranty and 25-year performance guarantee, while the Tesla Solar Roof Tile offers 25-year product and 25-year performance coverage. The Tesla Solar Roof Tile provides 15 additional years of defect protection, covering manufacturing issues, material failures, and premature performance loss. Based on their published degradation rates (2% first year then 0.55%/year for CertainTeed Solstice Solar Panel 365W; 2.5% first year then 0.6%/year for Tesla Solar Roof Tile), after 25 years the CertainTeed Solstice Solar Panel 365W should retain approximately 84.8% of original output versus 83.1% for the Tesla Solar Roof Tile. This 1.7 percentage point gap in end-of-life output meaningfully impacts lifetime energy economics.
Physical Dimensions & Weight
The CertainTeed Solstice Solar Panel 365W measures 1755×1044×40mm and weighs 21.6 kg, while the Tesla Solar Roof Tile measures 1143×381×12mm at 5.4 kg. 1.83 m² of panel area for the CertainTeed Solstice Solar Panel 365W versus 0.44 m² for the Tesla Solar Roof Tile. The Tesla Solar Roof Tile is 16.2 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 324 kg. The more compact Tesla Solar Roof Tile may be easier to fit on irregularly shaped or space-limited rooftops.
Specification Comparison
| Specification | CertainTeed Solstice Solar Panel 365W | Tesla Solar Roof Tile |
|---|---|---|
| Power | 365W | 71.67W |
| Efficiency | 19.9% | 15.5% |
| Power Density | 18.5 W/sq ft | 15.3 W/sq ft |
| Cell Type | Monocrystalline PERC | Monocrystalline |
| Bifacial | No | No |
| Weight | 21.6 kg | 5.4 kg |
| Temp Coefficient | -0.36%/°C | -0.4%/°C |
| Snow Load | 5400 Pa | 5400 Pa |
| Wind Load | 2400 Pa | 2400 Pa |
| Product Warranty | 10 years | 25 years |
| Performance Warranty | 25 years | 25 years |
| Degradation (Year 1) | 2% | 2.5% |
| Annual Degradation | 0.55% | 0.6% |
| Country | United States | United States |
5-Dimension Head-to-Head Analysis
1. Efficiency & Power Density
Winner: CertainTeed Solstice Solar Panel 365WThe CertainTeed Solstice Solar Panel 365W achieves 19.9% efficiency versus 15.5% — a 4.4 percentage point advantage. On a typical 30-panel residential roof, this translates to approximately 8.8 kW more total system capacity, or 40 kWh more annual production in an average US location.
2. Hot Climate Performance
Winner: CertainTeed Solstice Solar Panel 365WThe CertainTeed Solstice Solar Panel 365W has a better temperature coefficient of -0.36%/°C versus -0.4%/°C. On a 45°C summer day (20°C above STC), the winner retains 92.8% of rated power versus 92.0%. The difference is modest but accumulates over 25 years of summer production.
3. Durability & Warranty
Winner: Tesla Solar Roof TileTesla Solar Roof Tile leads with a 25-year product warranty versus 10 years. CertainTeed Solstice Solar Panel 365W degrades more slowly at 0.55% per year versus 0.6%. After 25 years, expect 84.8% vs 83.1% of original output for CertainTeed Solstice Solar Panel 365W and Tesla Solar Roof Tile respectively.
4. Power Output
Winner: CertainTeed Solstice Solar Panel 365WThe CertainTeed Solstice Solar Panel 365W delivers 365W versus 71.67W per panel — 293.33W more. For an 8 kW system, you need 22 panels with the higher-wattage option versus 112 panels, saving 90 panels and the associated racking and labor costs.
5. Cell Technology
Winner: Tesla Solar Roof TileThe CertainTeed Solstice Solar Panel 365W uses Monocrystalline PERC: PERC (Passivated Emitter Rear Cell) is the current mainstream technology, offering good efficiency at the lowest manufacturing cost. The Tesla Solar Roof Tile uses Monocrystalline: Monocrystalline. Monocrystalline represents a newer generation technology with a longer performance runway as manufacturing matures.
CertainTeed Solstice Solar Panel 365W
The CertainTeed Solstice Solar Panel 365W is a conventional residential solar panel from CertainTeed (Saint-Gobain), using monocrystalline PERC half-cut cells. Designed to pair with CertainTeed roofing products for a coordinated roof-and-solar installation through certified roofing contractors.
Pros
- + Made in the USA by Saint-Gobain subsidiary
- + 10-year product warranty — strong for US-manufactured panel
- + Designed for seamless pairing with CertainTeed roofing
- + Half-cut PERC cells for partial shade resilience
- + Available through established roofing contractor network
Cons
- - 19.9% efficiency below current N-Type leaders
- - 365W output lower than modern 400W+ panels
- - Heavier at 21.6 kg than comparable wattage panels
- - Higher cost per watt than budget alternatives
- - Limited distribution outside CertainTeed roofing dealers
Tesla Solar Roof Tile
The Tesla Solar Roof Tile is a building-integrated photovoltaic (BIPV) product that replaces the entire roof with a combination of active solar tiles and matching non-solar tiles, creating a seamless all-glass roof. Each active tile generates approximately 71.67W. Requires full roof replacement and Powerwall battery. Efficiency not publicly disclosed — estimated at 15-16%. Weight per tile not publicly disclosed. Installed cost is $5.00-$7.00/W for the full roof system.
Pros
- + Seamless full-roof aesthetic — virtually invisible as solar
- + 25-year warranty covering both tile and power output
- + Class 3 hail rating and Class F wind rating
- + Class A fire rating — highest available
- + Integrated with Tesla Powerwall and app ecosystem
- + Tempered glass more durable than standard roofing
Cons
- - $5.00-$7.00/W installed — 3-4x cost of conventional panels
- - Must replace entire roof — not for partial installations
- - Requires Tesla Powerwall purchase
- - Long installation wait times (months)
- - Tesla-only certified installers — limited availability
- - ~15.5% efficiency significantly lower than conventional panels
Choose CertainTeed Solstice Solar Panel 365W 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 want maximum output retention over the system's 25-30 year lifespan
- ✓ Homeowners doing a combined roof replacement and solar installation through CertainTeed-certified contractors.
Choose Tesla Solar Roof Tile If...
- ✓ Long-term warranty protection is a top priority and you plan to stay in your home for 25+ years
- ✓ Homeowners building new homes or needing a full roof replacement who want the most aesthetically integrated solar solution and are invested in the Tesla ecosystem.
Our Recommendation
The CertainTeed Solstice Solar Panel 365W is the decisive winner in this solar panel comparison, outperforming the Tesla Solar Roof Tile in 3 of 5 dimensions. Unless you have a specific requirement that the Tesla Solar Roof Tile uniquely addresses, the CertainTeed Solstice Solar Panel 365W is the stronger choice for virtually every installation scenario.
Frequently Asked Questions
Which is better, CertainTeed Solstice Solar Panel 365W or Tesla Solar Roof Tile?
The CertainTeed Solstice Solar Panel 365W wins this comparison by a decisive margin. It leads in efficiency (19.9% vs 15.5%). For most residential installations, the CertainTeed Solstice Solar Panel 365W is the stronger choice.
Which panel is more efficient, CertainTeed Solstice Solar Panel 365W or Tesla Solar Roof Tile?
The CertainTeed Solstice Solar Panel 365W at 19.9% module efficiency. Higher efficiency means more watts per square foot of roof space, which is critical for space-constrained installations. The difference of 4.4 percentage points translates to approximately 293.33W per panel under standard test conditions.
Which has a better warranty, CertainTeed Solstice Solar Panel 365W or Tesla Solar Roof Tile?
The CertainTeed Solstice Solar Panel 365W comes with a 10-year product warranty and 25-year performance guarantee. The Tesla Solar Roof Tile offers 25-year product and 25-year performance warranties. Tesla Solar Roof Tile provides 15 additional years of product coverage.
Which panel performs better in hot weather?
The CertainTeed Solstice Solar Panel 365W has a temperature coefficient of -0.36%/°C and the Tesla Solar Roof Tile is -0.4%/°C. CertainTeed Solstice Solar Panel 365W retains more power in heat — important in states like Arizona, Texas, and Florida. A lower (less negative) temperature coefficient is better.
How many CertainTeed Solstice Solar Panel 365W vs Tesla Solar Roof Tile panels do I need for an 8 kW system?
For an 8 kW system: you need 22 CertainTeed Solstice Solar Panel 365W panels (365W each) or 112 Tesla Solar Roof Tile panels (71.67W each). The CertainTeed Solstice Solar Panel 365W requires fewer panels, saving on racking hardware and installation labor.
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Last updated: February 2026