After Growing 40% In 2 Years, Why Have SunPower's Solar Installations Stagnated In 2018?

SunPower's (NASDAQ: SPWR) solar shipments grew from 0.97 GigaWatts in 2015 to 1.36 GigaWatts in 2017, a 40% jump. However, in 2018 SunPower's shipments remained at the same level, meaning net installations have risen 40% over the last 3 years, compared to more than a 100% growth...