New Class! – NEC 2017 & 2020 Solar + Storage Requirements New Course Update: A new course, 10-Hour Energy Storage 2020 NEC Class, taught by Sean White is HeatSpring’s current course that covers energy storage and the NEC. (Updated July 2022) Check out this new short course from Justine Sanchez and… Continue reading “New Class! – NEC 2017 & 2020 Solar + Storage Requirements”