X-Series Residential Solar Panels SunPower® X-Series Residential Solar Panels | X21-335-BLK | X21-345 Unmatched Performance, Reliability & Aesthetics More than 21% Efficiency Ideal for roofs where space is at a premium or where future expansion might be needed. Maximum Performance Designed to deliver the most energy in demanding real-world conditions, in partial shade and hot rooftop temperatures.1,2,4 Premium Aesthetics SunPower® Signature™ Black X-Series panels blend harmoniously into your roof. The most elegant choice for your home. Generate more energy per square foot X-Series residential panels convert more sunlight to electricity by producing 38% more power per panel1 and 70% more energy per square foot over 25 years.1,2,3 Highest Energy Production6 Produce more energy per rated watt Maxeon® Solar Cells: Fundamentally better Engineered for performance, designed for durability. High year-one performance delivers 8–10% more energy per rated watt.2 This advantage increases over time, producing 21% more energy over the first 25 years to meet your needs.3 Designed to deliver consistent, trouble-free energy over a very long lifetime. 3,4 Designed for Durability The SunPower Maxeon Solar Cell is the only cell built on a solid copper foundation. Virtually impervious to the corrosion and cracking that 25-Year Energy Production / Watt Engineered for Peace of Mind #1 Rank in Fraunhofer durability test.9 100% power maintained in Atlas 25+ comprehensive durability test. SunPower X-Series Year 1 Energy Advantage / Watt Same excellent durability as E-Series panels. More Energy Per Rated Watt degrade conventional panels. 3 10% Maintains High Power at High Temps 8% 6% No Light-Induced Degradation High Average Watts Better Low-Light and Spectral Response High

X-Series Residential Solar Panels SunPower® X-Series Residential Solar Panels | X21-335-BLK | X21-345 SunPower Offers The Best Combined Power And Product Warranty Power Warranty Traditional Warranty Product Warranty Traditional Warranty Rated Voltage (Vmpp) Sustainability Ammonia Test Potential-Induced Degradation free: 1000 V9 Available Listings Salt Spray Test Current Temp Coef. REFERENCES: 1 All comparisons are SPR-X21-345 vs. a representative conventional panel: 250 W, approx. 1.6 m², 15.3% efficiency. 2 Typically 8–10% more energy per watt, BEW/DNV Engineering “SunPower Yield Report,” Jan...