Highest efficiency solar panels

SunPower makes the highest efficiency solar panels you can buy for your roof.
Source: Highest of over 3,200 silicon solar panels, Photon Module Survey, Feb 2014

SunPower holds the world record for the highest efficiency silicon solar panel.
Source: Green, M. A., et al., “Solar Cell Efficiency Tables (version 43)," Progress in Photovoltaics, 2014

SunPower® X-Series panels deliver 38% more power.
Source: SunPower 345W panel vs. Conventional Panel (250W, 15.3% efficient, approx. 1.6 m2)

SunPower® E-Series panels deliver 31% more power.
Source: SunPower 327W panel vs. Conventional Panel (250W, 15.3% efficient, approx. 1.6 m2)

Highest reliability solar panels

Unmatched reliability
Source: Ranked no. 1 in the "PV Module Durability Initiative Public Report", Fraunhofer ISE, Feb 2013. Campeau, Z. et al. "SunPower Warranty Review, Feb 2013"

SunPower panels average only 0.25% power loss per year over the first 25 years
Source: Jordan, Dirk “SunPower Test Report”, NREL, Apr 2015; Campeau, Z. et al. "SunPower Module Degradation Rate", SunPower white paper, 2013

One out of every 20,000 panels has been returned under warranty
Source: Hasselbrink, E., et al. "Validation of the PVLife Model Against 3 Million Module-Years of Live Site Data." 39th IEEE PVSC, Tampa, Florida, 2013

SunPower predicts its panels will have a useful life of more than 40 years
Source: "SunPower Module 40 Year Useful Life", SunPower white paper. Feb 2013. Useful life is 99 out of 100 panels operating at more than 70% of rated power

SunPower panels ranked no. 1 in Fraunhofer durability testing
Source: "Fraunhofer PV Durability Initiative for Solar Modules: Part 2". Photovoltaics International, 2014

SunPower utility-scale power plants with on-site O&M staff deliver more than 99% availability
Source: BEW/DNV Engineering, "Availability Evaluation Report", Jan 2013. Requires on-site O&M staff

Highest solar panel energy production, year 1

SunPower X-Series panels deliver 8-10% more energy per watt in the first year
Source: BEW/DNV Engineering "SunPower Yield Report", Jan 2013, with CFV Solar Test Lab Report no. 12063, Jan 2013 temp. coef. calculation. Compared to a Conventional Panel (250 W, 15.3% efficient, approx. 1.6 m2)

SunPower E-Series panels deliver 7-9% more energy per watt in the first year
Source: BEW/DNV Engineering "SunPower Yield Report", Jan 2013. Compared to a Conventional Panel (250 W, 15.3% efficient, approx. 1.6 m2)

SunPower panels maintain their energy production much better than Conventional Panels in partly-shaded conditions
Source: PVEvolution Labs "SunPower Shading Study", Feb 2013. Compared to a Conventional Panel (240W, 15% efficient, approx. 1.6 m2)

SunPower X-Series panels have 5x less power drop from a single leaf shading a panel
Source: PVEvolution Labs "SunPower Shading Study", Feb 2013. Compared to a Conventional Panel (240W, 15% efficient, approx. 1.6 m2)

SunPower E-Series panels have 3x less power drop from a single leaf shading a panel
Source: PVEvolution Labs "SunPower Shading Study", Feb 2013. Compared to a Conventional Panel (240W, 15% efficient, approx. 1.6 m2)

Highest solar panel energy production, 25 years

SunPower X-Series solar panels

  1. SunPower X-Series solar panels produce 21% more energy per rated watt over the first 25 years
  2. SunPower X-Series solar panels produce 70% more energy from the same space over the first 25 years
  3. A SunPower X-Series solar panel produces the same total energy in its first 14 years as a conventional solar panel running for 25 years

Source: SunPower 345W compared to a Conventional Panel (240 W, 15% efficient, approx. 1.6 m2), 9% more energy per watt, 0.75%/yr slower degradation. BEW/DNV Engineering "SunPower Yield Report", Jan 2013, with CFV Solar Test Lab Report no. 12063, Jan 2013 temp. coef. calculation. Campeau, Z. et al. "SunPower Module Degradation Rate", SunPower white paper, Feb 2013.

SunPower E-Series solar panels

  1. SunPower E-Series solar panels produce 20% more energy per rated watt over the first 25 years
  2. SunPower E-Series solar panels produce 60% more energy from the same space over the first 25 years
  3. A SunPower E-Series solar panel produces the same total energy in its first 15 years as a conventional solar panel running for 25 years

Source: SunPower 327W compared to a Conventional Panel (240 W, 15% efficient, approx. 1.6 m2), 8% more energy per watt, 0.75%/yr slower degradation. BEW/DNV Eng. "SunPower Yield Report", Jan 2013. Jordan, Dirk "SunPower Test Report", NREL, Oct 2012. Campeau, Z. et al. "SunPower Module Degradation Rate", SunPower white paper, Feb 2013.