>20% efficiency modules

SunPower press release
Sunpower launched the SunPower™ E20 series of solar panels, the industry's first commercially-available solar panels to achieve total area efficiencies of 20 percent or more. The new 96-cell E20 solar panels are available in 333-watt and 327-watt models for rooftop installations and featureSunPower's 22.4 percent efficient patented Maxeon™ cell technology. The all-back contact Maxeon solar cell captures significantly more sunlight and conducts more electrical current than conventional solar cells, and holds the world record for efficiency among commercially available, mass-produced solar cells.