CertainTeed Solstice Solar Panel 365W Specifications & Review

The main reasons are US manufacturing (IRA domestic content bonus eligibility), coordinated roof-and-solar warranties from a single manufacturer, and the Saint-Gobain financial backing. If maximum efficiency or lowest cost per watt are your priorities, panels from LONGi, Canadian Solar, or Qcells offer better specs at lower prices. The CertainTeed panel makes most sense when you're already working with a CertainTeed roofing contractor on a re-roof project.

The CertainTeed Solstice Panel 365W is manufactured in the United States, which helps meet the domestic content requirements under the Inflation Reduction Act. If your system meets the full domestic content threshold (panels, inverter, racking, and wiring with sufficient US-sourced content), the federal ITC increases from 30% to 40%. Consult your installer and tax advisor to determine if your specific system configuration qualifies.

Yes — CertainTeed specifically supports hybrid installations where Solstice Solar Shingles cover aesthetically sensitive roof sections (front-facing, street-visible) while conventional Solstice panels are installed on less visible sections (rear-facing, flat sections) for higher power density. The systems use the same inverter and monitoring platform. Your installer can design a hybrid layout that balances aesthetics and performance.

CertainTeed is owned by Saint-Gobain, a company with over 350 years of operating history and €51 billion in annual revenue. Even if CertainTeed were to discontinue its solar product line, Saint-Gobain would be contractually obligated to honor existing warranties. This financial backing is significantly more robust than most pure-play solar companies, many of which are startups or mid-size firms with less certain long-term viability.

The CertainTeed Solstice Solar Panel 365W achieves 19.9% module efficiency using Monocrystalline PERC cell technology. This is around the industry average for residential solar panels in 2026.

It comes with a 10-year product warranty and a 25-year performance warranty guaranteeing output at approximately 84.8% of rated power at the end of the warranty period.

With a temperature coefficient of -0.36%/°C, the Solstice Solar Panel 365W experiences moderate power reduction in high temperatures. Every degree above 25°C reduces output by 0.36%.

At 365W per panel, you would need approximately 22 panels for an 8 kW system or 28 panels for a 10 kW system. Each panel measures 1755 x 1044 mm (19.7 sq ft).

The CertainTeed Solstice Solar Panel 365W works well with both string inverters and microinverters. For string inverters, choose one with a maximum input voltage above 41.5V and an MPPT voltage range that covers 34.6V. Microinverters rated for 365W+ panels are also an excellent choice, offering panel-level monitoring and shade tolerance. Popular options include Enphase IQ8 series microinverters and SolarEdge string inverters with power optimizers.

The CertainTeed Solstice Solar Panel 365W is built to last well beyond its 25-year performance warranty. With first-year degradation of 2% and annual degradation of 0.55% thereafter, the panel will still produce approximately 84.8% of its rated power after 25 years. Most modern solar panels continue generating useful power for 30-40 years, though output gradually decreases over time.

The CertainTeed Solstice Solar Panel 365W can work in hot states like Arizona, Nevada, and Texas, though its temperature coefficient of -0.36%/°C means it will lose some output on the hottest days. Consider panels with a lower (closer to 0) temperature coefficient if you live in an area with extreme heat. Higher sun exposure in these states means more total energy production throughout the year, often offsetting any heat-related losses.

The CertainTeed Solstice Solar Panel 365W delivers 19.9% efficiency, which is below the industry average of ~21%. Combined with a standard 10-year product warranty and 25-year performance guarantee, it offers reasonable value for homeowners seeking reliable solar generation.