Solar companies in the United States are stockpiling a massive amount of solar panels

Rooftop solar installers in the U.S. are stockpiling massive volumes of panels and other equipment before the ITC starts shrinking next year.

Sunrun is collecting enough equipment to help qualify 500 megawatts worth of planned installations. Sunrun isn’t the only one amassing inventories.

SunPower told investors during a recent earnings call that it was sourcing enough equipment to help qualify 200 megawatts worth of projects. While rival Vivint Solar has placed orders for 115 megawatts worth of panels.