The upcoming solar eclipse on August 21st may have more gravitas than neat pictures. Across the country, percentage of total sunlight blocked will vary from 50% to total darkness for approximately 3 minutes - spanning its full course from Oregon to South Carolina in a matter of 90 minutes. Granted its impact on daily activity will likely be minimal, photovoltaic generators across the country will have a much lower energy output. North Carolina has the largest amount of generator capacity that will be in the 90% darkness band, which provides with state with 3.1% of its electricity generation. However, California will be the hardest hit with a direct reduction of 4.2 GW statewide and is projected to even slightly darken the state for about 2.5 hours mid-morning.